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Austelle CW, Cox SS, Wills KE, Badran BW. Vagus nerve stimulation (VNS): recent advances and future directions. Clin Auton Res 2024:10.1007/s10286-024-01065-w. [PMID: 39363044 DOI: 10.1007/s10286-024-01065-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 09/09/2024] [Indexed: 10/05/2024]
Abstract
PURPOSE Vagus nerve stimulation (VNS) is emerging as a unique and potent intervention, particularly within neurology and psychiatry. The clinical value of VNS continues to grow, while the development of noninvasive options promises to change a landscape that is already quickly evolving. In this review, we highlight recent progress in the field and offer readers a glimpse of the future for this bright and promising modality. METHODS We compiled a narrative review of VNS literature using PubMed and organized the discussion by disease states with approved indications (epilepsy, depression, obesity, post-stroke motor rehabilitation, headache), followed by a section highlighting novel, exploratory areas of VNS research. In each section, we summarized the current role, recent advancements, and future directions of VNS in the treatment of each disease. RESULTS The field continues to gain appreciation for the clinical potential of this modality. VNS was initially developed for treatment-resistant epilepsy, with the first depression studies following shortly thereafter. Overall, VNS has gained approval or clearance in the treatment of medication-refractory epilepsy, treatment-resistant depression, obesity, migraine/cluster headache, and post-stroke motor rehabilitation. CONCLUSION Noninvasive VNS represents an opportunity to bridge the translational gap between preclinical and clinical paradigms and may offer the same therapeutic potential as invasive VNS. Further investigation into how VNS parameters modulate behavior and biology, as well as how to translate noninvasive options into the clinical arena, are crucial next steps for researchers and clinicians studying VNS.
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Affiliation(s)
- Christopher W Austelle
- Department of Psychiatry and Behavioral Sciences, Stanford University, 401 Quarry Road, Palo Alto, CA, 94305, USA.
- Veterans Affairs Palo Alto Healthcare System, and the Sierra Pacific Mental Illness, Research, Education, and Clinical Center (MIRECC), Palo Alto, CA, USA.
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA.
| | - Stewart S Cox
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Kristin E Wills
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Bashar W Badran
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
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Schambra HM, Hays SA. Vagus nerve stimulation for stroke rehabilitation: Neural substrates, neuromodulatory effects and therapeutic implications. J Physiol 2024. [PMID: 39243394 DOI: 10.1113/jp285566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 08/12/2024] [Indexed: 09/09/2024] Open
Abstract
Paired vagus nerve stimulation (VNS) has emerged as a promising strategy to potentiate recovery after neurological injury. This approach, which combines short bursts of electrical stimulation of the vagus nerve with rehabilitation exercises, received approval from the US Food and Drug Aministration in 2021 as the first neuromodulation-based therapy for chronic stroke. Because this treatment is increasingly implemented in clinical practice, there is a need to take stock of what we know about this approach and what we have yet to learn. Here, we provide a survey on the foundational basis of VNS therapy for stroke and offer insight into the mechanisms that underlie potentiated recovery, focusing on the principles of neuromodulatory reinforcement. We discuss the current state of observations regarding synaptic reorganization in motor networks that are enhanced by VNS, and we propose other prospective loci of neuromodulation that should be evaluated in the future. Finally, we highlight the future opportunities and challenges to be faced as this approach is increasingly translated to clinical use. Collectively, a clearer understanding of the mechanistic basis of VNS therapy may reveal ways to maximize its benefits.
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Affiliation(s)
- Heidi M Schambra
- Departments of Neurology & Rehabilitation Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Seth A Hays
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
- Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas, Richardson, TX, USA
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Du L, He X, Xiong X, Zhang X, Jian Z, Yang Z. Vagus nerve stimulation in cerebral stroke: biological mechanisms, therapeutic modalities, clinical applications, and future directions. Neural Regen Res 2024; 19:1707-1717. [PMID: 38103236 PMCID: PMC10960277 DOI: 10.4103/1673-5374.389365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 08/31/2023] [Accepted: 09/26/2023] [Indexed: 12/18/2023] Open
Abstract
Stroke is a major disorder of the central nervous system that poses a serious threat to human life and quality of life. Many stroke victims are left with long-term neurological dysfunction, which adversely affects the well-being of the individual and the broader socioeconomic impact. Currently, post-stroke brain dysfunction is a major and difficult area of treatment. Vagus nerve stimulation is a Food and Drug Administration-approved exploratory treatment option for autism, refractory depression, epilepsy, and Alzheimer's disease. It is expected to be a novel therapeutic technique for the treatment of stroke owing to its association with multiple mechanisms such as altering neurotransmitters and the plasticity of central neurons. In animal models of acute ischemic stroke, vagus nerve stimulation has been shown to reduce infarct size, reduce post-stroke neurological damage, and improve learning and memory capacity in rats with stroke by reducing the inflammatory response, regulating blood-brain barrier permeability, and promoting angiogenesis and neurogenesis. At present, vagus nerve stimulation includes both invasive and non-invasive vagus nerve stimulation. Clinical studies have found that invasive vagus nerve stimulation combined with rehabilitation therapy is effective in improving upper limb motor and cognitive abilities in stroke patients. Further clinical studies have shown that non-invasive vagus nerve stimulation, including ear/cervical vagus nerve stimulation, can stimulate vagal projections to the central nervous system similarly to invasive vagus nerve stimulation and can have the same effect. In this paper, we first describe the multiple effects of vagus nerve stimulation in stroke, and then discuss in depth its neuroprotective mechanisms in ischemic stroke. We go on to outline the results of the current major clinical applications of invasive and non-invasive vagus nerve stimulation. Finally, we provide a more comprehensive evaluation of the advantages and disadvantages of different types of vagus nerve stimulation in the treatment of cerebral ischemia and provide an outlook on the developmental trends. We believe that vagus nerve stimulation, as an effective treatment for stroke, will be widely used in clinical practice to promote the recovery of stroke patients and reduce the incidence of disability.
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Affiliation(s)
- Li Du
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Xuan He
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Xiaoxing Xiong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Xu Zhang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Zhihong Jian
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Zhenxing Yang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
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Korupolu R, Miller A, Park A, Yozbatiran N. Neurorehabilitation with vagus nerve stimulation: a systematic review. Front Neurol 2024; 15:1390217. [PMID: 38872818 PMCID: PMC11169586 DOI: 10.3389/fneur.2024.1390217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 05/08/2024] [Indexed: 06/15/2024] Open
Abstract
Objective To systematically review vagus nerve stimulation (VNS) studies to present data on the safety and efficacy on motor recovery following stroke, traumatic brain injury (TBI), and spinal cord injury (SCI). Methods Data sources: PubMed, EMBASE, SCOPUS, and Cochrane. Study selection Clinical trials of VNS in animal models and humans with TBI and SCI were included to evaluate the effects of pairing VNS with rehabilitation therapy on motor recovery. Data extraction Two reviewers independently assessed articles according to the evaluation criteria and extracted relevant data electronically. Data synthesis Twenty-nine studies were included; 11 were animal models of stroke, TBI, and SCI, and eight involved humans with stroke. While there was heterogeneity in methods of delivering VNS with respect to rehabilitation therapy in animal studies and human non-invasive studies, a similar methodology was used in all human-invasive VNS studies. In animal studies, pairing VNS with rehabilitation therapy consistently improved motor outcomes compared to controls. Except for one study, all human invasive and non-invasive studies with controls demonstrated a trend toward improvement in motor outcomes compared to sham controls post-intervention. However, compared to non-invasive, invasive VNS, studies reported severe adverse events such as vocal cord palsy, dysphagia, surgical site infection, and hoarseness of voice, which were found to be related to surgery. Conclusion Our review suggests that VNS (non-invasive or invasive) paired with rehabilitation can improve motor outcomes after stroke in humans. Hence, VNS human studies are needed in people with TBI and SCI. There are risks related to device implantation to deliver invasive VNS compared to non-invasive VNS. Future human comparison studies are required to study and quantify the efficacy vs. risks of paired VNS delivered via different methods with rehabilitation, which would allow patients to make an informed decision. Systematic review registration https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=330653.
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Affiliation(s)
- Radha Korupolu
- University of Texas Health Science Center at Houston, Houston, TX, United States
- TIRR Memorial Hermann Hospital, Houston, TX, United States
| | - Alyssa Miller
- University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Andrew Park
- Craig Hospital, Englewood, CO, United States
- University of Colorado Hospital, Aurora, CO, United States
| | - Nuray Yozbatiran
- University of Texas Health Science Center at Houston, Houston, TX, United States
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Jenkins DD, Garner SS, Brennan A, Morris J, Bonham K, Adams L, Hunt S, Moss H, Badran BW, George MS, Wiest DB. Transcutaneous auricular vagus nerve stimulation may benefit from the addition of N-acetylcysteine to facilitate motor learning in infants of diabetic mothers failing oral feeds. Front Hum Neurosci 2024; 18:1373543. [PMID: 38841121 PMCID: PMC11151742 DOI: 10.3389/fnhum.2024.1373543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 05/06/2024] [Indexed: 06/07/2024] Open
Abstract
Objective This study aims to determine if pretreating with enteral N-acetylcysteine (NAC) improves CNS oxidative stress and facilitates improvement in oromotor skills during transcutaneous auricular nerve stimulation (taVNS) paired with oral feedings in infants of diabetic mothers (IDMs) who are failing oral feeds. Methods We treated 10 IDMs who were gastrostomy tube candidates in an open-label trial of NAC and taVNS paired with oral feeding. NAC (75 or 100 mg/kg/dose) was given by nasogastric (NG) administration every 6 h for 4 days, then combined with taVNS paired with 2 daily feeds for another 14 days. NAC pharmacokinetic (PK) parameters were determined from plasma concentrations at baseline and at steady state on day 4 of treatment in conjunction with magnetic resonance spectroscopic (MRS) quantification of CNS glutathione (GSH) as a marker of oxidative stress. We compared increases in oral feeding volumes before and during taVNS treatment and with a prior cohort of 12 IDMs who largely failed to achieve full oral feeds with taVNS alone. Results NAC 100 mg/kg/dose every 6 h NG resulted in plasma [NAC] that increased [GSH] in the basal ganglia with a mean of 0.13 ± 0.08 mM (p = 0.01, compared to baseline). Mean daily feeding volumes increased over 14 days of NAC + taVNS compared to the 14 days before treatment and compared to the prior cohort of 12 IDMs treated with taVNS alone. Seven IDMs reached full oral feeds sufficient for discharge, while three continued to have inadequate intake. Conclusion In IDM failing oral feeds, NAC 100 mg/kg/dose every 6 h NG for 4 days before and during taVNS paired with oral feeding increased CNS GSH, potentially mitigating oxidative stress, and was associated with improving functional feeding outcomes compared to taVNS alone in a prior cohort. This represents a novel approach to neuromodulation and supports the concept that mitigation of ongoing oxidative stress may increase response to taVNS paired with a motor task.
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Affiliation(s)
- Dorothea D. Jenkins
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, United States
| | - Sandra S. Garner
- Department of Clinical Pharmacy and Outcomes Sciences, College of Pharmacy, Medical University of South Carolina, Charleston, SC, United States
| | - Alyssa Brennan
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, United States
| | - Jessica Morris
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, United States
| | - Kate Bonham
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, United States
| | - Lauren Adams
- Department of Obstetrics and Gynecology, Medical University of South Carolina, Charleston, SC, United States
| | - Sally Hunt
- Department of Pediatrics, University of North Carolina, Chapel Hill, NC, United States
| | - Hunter Moss
- Department of Neuroscience and the Center for Biomedical Imaging, Medical University of South Carolina, Charleston, SC, United States
| | - Bashar W. Badran
- Neuro-X Lab, Department of Psychiatry, Medical University of South Carolina, Charleston, SC, United States
| | - Mark S. George
- Brain Stimulation Division, Department of Psychiatry, Medical University of South Carolina, Charleston, SC, United States
- Ralph H. Johnson VA Medical Center, Charleston, SC, United States
| | - Donald B. Wiest
- Department of Clinical Pharmacy and Outcomes Sciences, College of Pharmacy, Medical University of South Carolina, Charleston, SC, United States
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Villar Ortega E, Buetler KA, Aksöz EA, Marchal-Crespo L. Enhancing touch sensibility with sensory electrical stimulation and sensory retraining. J Neuroeng Rehabil 2024; 21:79. [PMID: 38750521 PMCID: PMC11096118 DOI: 10.1186/s12984-024-01371-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 05/08/2024] [Indexed: 05/18/2024] Open
Abstract
A large proportion of stroke survivors suffer from sensory loss, negatively impacting their independence, quality of life, and neurorehabilitation prognosis. Despite the high prevalence of somatosensory impairments, our understanding of somatosensory interventions such as sensory electrical stimulation (SES) in neurorehabilitation is limited. We aimed to study the effectiveness of SES combined with a sensory discrimination task in a well-controlled virtual environment in healthy participants, setting a foundation for its potential application in stroke rehabilitation. We employed electroencephalography (EEG) to gain a better understanding of the underlying neural mechanisms and dynamics associated with sensory training and SES. We conducted a single-session experiment with 26 healthy participants who explored a set of three visually identical virtual textures-haptically rendered by a robotic device and that differed in their spatial period-while physically guided by the robot to identify the odd texture. The experiment consisted of three phases: pre-intervention, intervention, and post-intervention. Half the participants received subthreshold whole-hand SES during the intervention, while the other half received sham stimulation. We evaluated changes in task performance-assessed by the probability of correct responses-before and after intervention and between groups. We also evaluated differences in the exploration behavior, e.g., scanning speed. EEG was employed to examine the effects of the intervention on brain activity, particularly in the alpha frequency band (8-13 Hz) associated with sensory processing. We found that participants in the SES group improved their task performance after intervention and their scanning speed during and after intervention, while the sham group did not improve their task performance. However, the differences in task performance improvements between groups only approached significance. Furthermore, we found that alpha power was sensitive to the effects of SES; participants in the stimulation group exhibited enhanced brain signals associated with improved touch sensitivity likely due to the effects of SES on the central nervous system, while the increase in alpha power for the sham group was less pronounced. Our findings suggest that SES enhances texture discrimination after training and has a positive effect on sensory-related brain areas. Further research involving brain-injured patients is needed to confirm the potential benefit of our solution in neurorehabilitation.
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Affiliation(s)
- Eduardo Villar Ortega
- Motor Learning and Neurorehabilitation Laboratory, ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland
| | - Karin A Buetler
- Motor Learning and Neurorehabilitation Laboratory, ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland
| | - Efe Anil Aksöz
- rehaLab-The Laboratory for Rehabilitation Engineering, Institute for Human Centred Engineering HuCE, Division of Mechatronics and Systems Engineering, Department of Engineering and Information Technology, Bern University of Applied Sciences, Biel, Switzerland
| | - Laura Marchal-Crespo
- Motor Learning and Neurorehabilitation Laboratory, ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland.
- Department of Cognitive Robotics, Delft University of Technology, Delft, The Netherlands.
- Department of Rehabilitation Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands.
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Dawson J, Abdul-Rahim AH, Kimberley TJ. Neurostimulation for treatment of post-stroke impairments. Nat Rev Neurol 2024; 20:259-268. [PMID: 38570705 DOI: 10.1038/s41582-024-00953-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/29/2024] [Indexed: 04/05/2024]
Abstract
Neurostimulation, the use of electrical stimulation to modulate the activity of the nervous system, is now commonly used for the treatment of chronic pain, movement disorders and epilepsy. Many neurostimulation techniques have now shown promise for the treatment of physical impairments in people with stroke. In 2021, vagus nerve stimulation was approved by the FDA as an adjunct to intensive rehabilitation therapy for the treatment of chronic upper extremity deficits after ischaemic stroke. In 2024, pharyngeal electrical stimulation was conditionally approved by the UK National Institute for Health and Care Excellence for neurogenic dysphagia in people with stroke who have a tracheostomy. Many other approaches have also been tested in pivotal device trials and a number of approaches are in early-phase study. Typically, neurostimulation techniques aim to increase neuroplasticity in response to training and rehabilitation, although the putative mechanisms of action differ and are not fully understood. Neurostimulation techniques offer a number of practical advantages for use after stroke, such as precise dosing and timing, but can be invasive and costly to implement. This Review focuses on neurostimulation techniques that are now in clinical use or that have reached the stage of pivotal trials and show considerable promise for the treatment of post-stroke impairments.
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Affiliation(s)
- Jesse Dawson
- School of Cardiovascular and Metabolic Health, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.
| | - Azmil H Abdul-Rahim
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, UK
- Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
| | - Teresa J Kimberley
- Department of Physical Therapy, School of Health and Rehabilitation Sciences, Institute of Health Professions, Massachusetts General Hospital, Boston, MA, USA
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Gerges ANH, Graetz L, Hillier S, Uy J, Hamilton T, Opie G, Vallence AM, Braithwaite FA, Chamberlain S, Hordacre B. Transcutaneous auricular vagus nerve stimulation modifies cortical excitability in middle-aged and older adults. Psychophysiology 2024:e14584. [PMID: 38602055 DOI: 10.1111/psyp.14584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/23/2024] [Accepted: 03/26/2024] [Indexed: 04/12/2024]
Abstract
There is a growing interest in the clinical application of transcutaneous auricular vagus nerve stimulation (taVNS). However, its effect on cortical excitability, and whether this is modulated by stimulation duration, remains unclear. We evaluated whether taVNS can modify excitability in the primary motor cortex (M1) in middle-aged and older adults and whether the stimulation duration moderates this effect. In addition, we evaluated the blinding efficacy of a commonly reported sham method. In a double-blinded randomized cross-over sham-controlled study, 23 healthy adults (mean age 59.91 ± 6.87 years) received three conditions: active taVNS for 30 and 60 min and sham for 30 min. Single and paired-pulse transcranial magnetic stimulation was delivered over the right M1 to evaluate motor-evoked potentials. Adverse events, heart rate and blood pressure measures were evaluated. Participant blinding effectiveness was assessed via guesses about group allocation. There was an increase in short-interval intracortical inhibition (F = 7.006, p = .002) and a decrease in short-interval intracortical facilitation (F = 4.602, p = .014) after 60 min of taVNS, but not 30 min, compared to sham. taVNS was tolerable and safe. Heart rate and blood pressure were not modified by taVNS (p > .05). Overall, 96% of participants detected active stimulation and 22% detected sham stimulation. taVNS modifies cortical excitability in M1 and its effect depends on stimulation duration in middle-aged and older adults. taVNS increased GABAAergic inhibition and decreased glutamatergic activity. Sham taVNS protocol is credible but there is an imbalance in beliefs about group allocation.
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Affiliation(s)
- Ashraf N H Gerges
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, South Australia, Australia
| | - Lynton Graetz
- College of Education, Psychology and Social Work, Flinders University, Adelaide, South Australia, Australia
| | - Susan Hillier
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, South Australia, Australia
| | - Jeric Uy
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, South Australia, Australia
| | - Taya Hamilton
- Perron Institute for Neurological and Translational Science, Perth, Western Australia, Australia
- Centre for Neuromuscular and Neurological Disorders, University of Western Australia, Perth, Western Australia, Australia
| | - George Opie
- Discipline of Physiology, School of Biomedicine, The University of Adelaide, Adelaide, South Australia, Australia
| | - Ann-Maree Vallence
- School of Psychology, College of Health and Education, Murdoch University, Perth, Western Australia, Australia
- Centre for Healthy Ageing, Health Futures Institute, Murdoch University, Perth, Western Australia, Australia
| | - Felicity A Braithwaite
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, South Australia, Australia
| | - Saran Chamberlain
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, South Australia, Australia
| | - Brenton Hordacre
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, South Australia, Australia
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Wang MH, Wang YX, Xie M, Chen LY, He MF, Lin F, Jiang ZL. Transcutaneous auricular vagus nerve stimulation with task-oriented training improves upper extremity function in patients with subacute stroke: a randomized clinical trial. Front Neurosci 2024; 18:1346634. [PMID: 38525376 PMCID: PMC10957639 DOI: 10.3389/fnins.2024.1346634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/27/2024] [Indexed: 03/26/2024] Open
Abstract
Background Transcutaneous auricular vagus nerve stimulation (taVNS) has emerged as a promising brain stimulation modality in poststroke upper extremity rehabilitation. Although several studies have examined the safety and reliability of taVNS, the mechanisms underlying motor recovery in stroke patients remain unclear. Objectives This study aimed to investigate the effects of taVNS paired with task-oriented training (TOT) on upper extremity function in patients with subacute stroke and explore the potential underlying mechanisms. Methods In this double-blinded, randomized, controlled pilot trial, 40 patients with subacute stroke were randomly assigned to two groups: the VNS group (VG), receiving taVNS during TOT, and the Sham group (SG), receiving sham taVNS during TOT. The intervention was delivered 5 days per week for 4 weeks. Upper extremity function was measured using the Fugl-Meyer Assessment-Upper Extremity (FMA-UE), the Action Research Arm Test (ARAT). Activities of daily living were measured by the modified Barthel Index (MBI). Motor-evoked potentials (MEPs) were measured to evaluate cortical excitability. Assessments were administered at baseline and post-intervention. Additionally, the immediate effect of taVNS was detected using functional near-infrared spectroscopy (fNIRS) and heart rate variability (HRV) before intervention. Results The VG showed significant improvements in upper extremity function (FMA-UE, ARAT) and activities of daily living (MBI) compared to the SG at post-intervention. Furthermore, the VG demonstrated a higher rate of elicited ipsilesional MEPs and a shorter latency of MEPs in the contralesional M1. In the VG, improvements in FMA-UE were significantly associated with reduced latency of contralesional MEPs. Additionally, fNIRS revealed increased activation in the contralesional prefrontal cortex and ipsilesional sensorimotor cortex in the VG in contrast to the SG. However, no significant between-group differences were found in HRV. Conclusion The combination of taVNS with TOT effectively improves upper extremity function in patients with subacute stroke, potentially through modulating the bilateral cortex excitability to facilitate task-specific functional recovery.
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Affiliation(s)
- Meng-Huan Wang
- School of Rehabilitation Medicine, Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yi-Xiu Wang
- School of Rehabilitation Medicine, Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Min Xie
- Department of Rehabilitation Medicine, Sir Run Run Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Li-Yan Chen
- School of Rehabilitation Medicine, Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Meng-Fei He
- School of Rehabilitation Medicine, Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Feng Lin
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Rehabilitation Medicine, Sir Run Run Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhong-Li Jiang
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Rehabilitation Medicine, Sir Run Run Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
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Kim S, Park HY. Update on Non-invasive Brain Stimulation on Stroke Motor Impairment: A Narrative Review. BRAIN & NEUROREHABILITATION 2024; 17:e5. [PMID: 38585032 PMCID: PMC10990843 DOI: 10.12786/bn.2024.17.e5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/12/2023] [Accepted: 12/28/2023] [Indexed: 04/09/2024] Open
Abstract
Stroke is a leading global cause of death and disability, with motor impairment being one of the common post-stroke complications. Rehabilitation is crucial for functional recovery. Recently, non-invasive brain stimulation (NIBS) has emerged as a promising intervention that allows neuromodulation by activating or inhibiting neural activity in specific brain regions. This narrative review aims to examine current research on the effects of various NIBS techniques, including repetitive transcranial magnetic stimulation, transcranial direct current stimulation, vagus nerve stimulation, and transcranial focused ultrasound on post-stroke motor function.
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Affiliation(s)
- Sejoon Kim
- Department of Rehabilitation Medicine, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hae-Yeon Park
- Department of Rehabilitation Medicine, Bucheon St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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González-González MA, Conde SV, Latorre R, Thébault SC, Pratelli M, Spitzer NC, Verkhratsky A, Tremblay MÈ, Akcora CG, Hernández-Reynoso AG, Ecker M, Coates J, Vincent KL, Ma B. Bioelectronic Medicine: a multidisciplinary roadmap from biophysics to precision therapies. Front Integr Neurosci 2024; 18:1321872. [PMID: 38440417 PMCID: PMC10911101 DOI: 10.3389/fnint.2024.1321872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 01/10/2024] [Indexed: 03/06/2024] Open
Abstract
Bioelectronic Medicine stands as an emerging field that rapidly evolves and offers distinctive clinical benefits, alongside unique challenges. It consists of the modulation of the nervous system by precise delivery of electrical current for the treatment of clinical conditions, such as post-stroke movement recovery or drug-resistant disorders. The unquestionable clinical impact of Bioelectronic Medicine is underscored by the successful translation to humans in the last decades, and the long list of preclinical studies. Given the emergency of accelerating the progress in new neuromodulation treatments (i.e., drug-resistant hypertension, autoimmune and degenerative diseases), collaboration between multiple fields is imperative. This work intends to foster multidisciplinary work and bring together different fields to provide the fundamental basis underlying Bioelectronic Medicine. In this review we will go from the biophysics of the cell membrane, which we consider the inner core of neuromodulation, to patient care. We will discuss the recently discovered mechanism of neurotransmission switching and how it will impact neuromodulation design, and we will provide an update on neuronal and glial basis in health and disease. The advances in biomedical technology have facilitated the collection of large amounts of data, thereby introducing new challenges in data analysis. We will discuss the current approaches and challenges in high throughput data analysis, encompassing big data, networks, artificial intelligence, and internet of things. Emphasis will be placed on understanding the electrochemical properties of neural interfaces, along with the integration of biocompatible and reliable materials and compliance with biomedical regulations for translational applications. Preclinical validation is foundational to the translational process, and we will discuss the critical aspects of such animal studies. Finally, we will focus on the patient point-of-care and challenges in neuromodulation as the ultimate goal of bioelectronic medicine. This review is a call to scientists from different fields to work together with a common endeavor: accelerate the decoding and modulation of the nervous system in a new era of therapeutic possibilities.
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Affiliation(s)
- María Alejandra González-González
- Jan and Dan Duncan Neurological Research Institute, Texas Children’s Hospital, Houston, TX, United States
- Department of Pediatric Neurology, Baylor College of Medicine, Houston, TX, United States
| | - Silvia V. Conde
- iNOVA4Health, NOVA Medical School, Faculdade de Ciências Médicas, NOVA University, Lisbon, Portugal
| | - Ramon Latorre
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
| | - Stéphanie C. Thébault
- Laboratorio de Investigación Traslacional en salud visual (D-13), Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Marta Pratelli
- Neurobiology Department, Kavli Institute for Brain and Mind, UC San Diego, La Jolla, CA, United States
| | - Nicholas C. Spitzer
- Neurobiology Department, Kavli Institute for Brain and Mind, UC San Diego, La Jolla, CA, United States
| | - Alexei Verkhratsky
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
- Achucarro Centre for Neuroscience, IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
- Department of Forensic Analytical Toxicology, School of Forensic Medicine, China Medical University, Shenyang, China
- International Collaborative Center on Big Science Plan for Purinergic Signaling, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Department of Stem Cell Biology, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
| | - Marie-Ève Tremblay
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
- Department of Molecular Medicine, Université Laval, Québec City, QC, Canada
- Department of Biochemistry and Molecular Biology, The University of British Columbia, Vancouver, BC, Canada
| | - Cuneyt G. Akcora
- Department of Computer Science, University of Central Florida, Orlando, FL, United States
| | | | - Melanie Ecker
- Department of Biomedical Engineering, University of North Texas, Denton, TX, United States
| | | | - Kathleen L. Vincent
- Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, TX, United States
| | - Brandy Ma
- Stanley H. Appel Department of Neurology, Houston Methodist Hospital, Houston, TX, United States
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12
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Gerges ANH, Williams EER, Hillier S, Uy J, Hamilton T, Chamberlain S, Hordacre B. Clinical application of transcutaneous auricular vagus nerve stimulation: a scoping review. Disabil Rehabil 2024:1-31. [PMID: 38362860 DOI: 10.1080/09638288.2024.2313123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 01/27/2024] [Indexed: 02/17/2024]
Abstract
PURPOSE Transcutaneous auricular vagus nerve stimulation (taVNS) is an emerging non-invasive neuromodulation therapy. This study aimed to explore the therapeutic use of taVNS, optimal stimulation parameters, effective sham protocols, and safety. METHODS A scoping review was conducted. Five databases and grey literature were searched. The data extracted included stimulation parameters, adverse events (AEs), and therapeutic effects on clinical outcomes. RESULTS 109 studies were included. taVNS was used across 21 different clinical populations, most commonly in psychiatric, cardiac, and neurological disorders. Overall, 2,214 adults received active taVNS and 1,017 received sham taVNS. Reporting of stimulation parameters was limited and inconsistent. taVNS appeared to have a favourable therapeutic effect across a wide range of clinical populations with varied parameters. Three sham protocols were reported but their effectiveness was documented in only two of the 54 sham-controlled studies. Most reported adverse events were localised to stimulation site. CONCLUSION There is growing evidence for taVNS therapeutic effect. taVNS appears safe and tolerable. Sham protocols need evaluation. Standardised and comprehensive reporting of both stimulation parameters and adverse events is required. Two different questionnaires have been proposed to evaluate adverse events and the effectiveness of sham methods in blinding participants.
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Affiliation(s)
- Ashraf N H Gerges
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, Australia
| | - Ellen E R Williams
- School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, Australia
- Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, Australia
| | - Susan Hillier
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, Australia
| | - Jeric Uy
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, Australia
| | - Taya Hamilton
- Perron Institute for Neurological and Translational Science, Perth, Australia
- Fourier Intelligence International Pte Ltd., Global Headquarters, Singapore, Singapore
| | - Saran Chamberlain
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, Australia
| | - Brenton Hordacre
- Innovation, Implementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, Australia
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13
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Jelinek M, Lipkova J, Duris K. Vagus nerve stimulation as immunomodulatory therapy for stroke: A comprehensive review. Exp Neurol 2024; 372:114628. [PMID: 38042360 DOI: 10.1016/j.expneurol.2023.114628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/20/2023] [Accepted: 11/27/2023] [Indexed: 12/04/2023]
Abstract
Stroke is a devastating cerebrovascular pathology with high morbidity and mortality. Inflammation plays a central role in the pathophysiology of stroke. Vagus nerve stimulation (VNS) is a promising immunomodulatory method that has shown positive effects in stroke treatment, including neuroprotection, anti-apoptosis, anti-inflammation, antioxidation, reduced infarct volume, improved neurological scores, and promotion of M2 microglial polarization. In this review, we summarize the current knowledge about the vagus nerve's immunomodulatory effects through the cholinergic anti-inflammatory pathway (CAP) and provide a comprehensive assessment of the available experimental literature focusing on the use of VNS in stroke treatment.
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Affiliation(s)
- Matyas Jelinek
- Department of Pathophysiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Jolana Lipkova
- Department of Pathophysiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Kamil Duris
- Department of Pathophysiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic; Department of Neurosurgery, The University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic.
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14
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Malakouti N, Serruya MD, Cramer SC, Kimberley TJ, Rosenwasser RH. Making Sense of Vagus Nerve Stimulation for Stroke. Stroke 2024; 55:519-522. [PMID: 38095119 DOI: 10.1161/strokeaha.123.044576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Implantable vagus nerve stimulation, paired with high-dose occupational therapy, has been shown to be effective in improving upper limb function among patients with stroke and received regulatory approval from the US Food and Drug Administration and the Centers for Medicare & Medicaid Services. Combining nonsurgical and surgical approaches of vagus nerve stimulation in recent meta-analyses has resulted in misleading reports on the efficacy of each type of stimulation among patients with stroke. This article aims to clarify the confusion surrounding implantable vagus nerve stimulation as a poststroke treatment option, highlighting the importance of distinguishing between transcutaneous auricular vagus nerve stimulation and implantable vagus nerve stimulation. Recent meta-analyses on vagus nerve stimulation have inappropriately combined studies of fundamentally different interventions, outcome measures, and participant selection, which do not conform to methodological best practices and, hence, cannot be used to deduce the relative efficacy of the different types of vagus nerve stimulation for stroke rehabilitation. Health care providers, patients, and insurers should rely on appropriately designed research to guide well-informed decisions.
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Affiliation(s)
- Niloufar Malakouti
- Raphael Center for Neurorestoration (N.M., M.D.S.), Thomas Jefferson University Hospital, Philadelphia, PA
| | - Mijail D Serruya
- Raphael Center for Neurorestoration (N.M., M.D.S.), Thomas Jefferson University Hospital, Philadelphia, PA
- Department of Neurology (M.D.S.), Thomas Jefferson University Hospital, Philadelphia, PA
| | - Steven C Cramer
- Department of Neurology, David Geffen School of Medicine at the University of California, Los Angeles (UCLA), California Rehabilitation Institute (S.C.C.)
| | - Teresa J Kimberley
- Department of Physical Therapy, School of Health and Rehabilitation Science, MGH Institute of Health Professions, Boston, MA (T.J.K.)
| | - Robert H Rosenwasser
- Department of Neurological Surgery (R.H.R.), Thomas Jefferson University Hospital, Philadelphia, PA
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15
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Bernal-Jiménez JJ, Polonio-López B, Sanz-García A, Martín-Conty JL, Lerín-Calvo A, Segura-Fragoso A, Martín-Rodríguez F, Cantero-Garlito PA, Corregidor-Sánchez AI, Mordillo-Mateos L. Is the Combination of Robot-Assisted Therapy and Transcranial Direct Current Stimulation Useful for Upper Limb Motor Recovery? A Systematic Review with Meta-Analysis. Healthcare (Basel) 2024; 12:337. [PMID: 38338223 PMCID: PMC10855329 DOI: 10.3390/healthcare12030337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/18/2024] [Accepted: 01/26/2024] [Indexed: 02/12/2024] Open
Abstract
Stroke is the third leading cause of disability in the world, and effective rehabilitation is needed to improve lost functionality post-stroke. In this regard, robot-assisted therapy (RAT) and transcranial direct current stimulation (tDCS) are promising rehabilitative approaches that have been shown to be effective in motor recovery. In the past decade, they have been combined to study whether their combination produces adjuvant and greater effects on stroke recovery. The aim of this study was to estimate the effectiveness of the combined use of RATs and tDCS in the motor recovery of the upper extremities after stroke. After reviewing 227 studies, we included nine randomised clinical trials (RCTs) in this study. We analysed the methodological quality of all nine RCTs in the meta-analysis. The analysed outcomes were deficit severity, hand dexterity, spasticity, and activity. The addition of tDCS to RAT produced a negligible additional benefit on the effects of upper limb function (SMD -0.09, 95% CI -0.31 to 0.12), hand dexterity (SMD 0.12, 95% CI -0.22 to 0.46), spasticity (SMD 0.04, 95% CI -0.24 to 0.32), and activity (SMD 0.66, 95% CI -1.82 to 3.14). There is no evidence of an additional effect when adding tDCS to RAT for upper limb recovery after stroke. Combining tDCS with RAT does not improve upper limb motor function, spasticity, and/or hand dexterity. Future research should focus on the use of RAT protocols in which the patient is given an active role, focusing on the intensity and dosage, and determining how certain variables influence the success of RAT.
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Affiliation(s)
- Juan J. Bernal-Jiménez
- Faculty of Health Sciences, University of Castilla-La Mancha, 45600 Talavera de la Reina, Spain; (J.J.B.-J.); (A.S.-G.); (J.L.M.-C.); (A.S.-F.); (P.A.C.-G.); (A.-I.C.-S.); (L.M.-M.)
- Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, 45600 Talavera de la Reina, Spain
| | - Begoña Polonio-López
- Faculty of Health Sciences, University of Castilla-La Mancha, 45600 Talavera de la Reina, Spain; (J.J.B.-J.); (A.S.-G.); (J.L.M.-C.); (A.S.-F.); (P.A.C.-G.); (A.-I.C.-S.); (L.M.-M.)
- Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, 45600 Talavera de la Reina, Spain
| | - Ancor Sanz-García
- Faculty of Health Sciences, University of Castilla-La Mancha, 45600 Talavera de la Reina, Spain; (J.J.B.-J.); (A.S.-G.); (J.L.M.-C.); (A.S.-F.); (P.A.C.-G.); (A.-I.C.-S.); (L.M.-M.)
- Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, 45600 Talavera de la Reina, Spain
| | - José L. Martín-Conty
- Faculty of Health Sciences, University of Castilla-La Mancha, 45600 Talavera de la Reina, Spain; (J.J.B.-J.); (A.S.-G.); (J.L.M.-C.); (A.S.-F.); (P.A.C.-G.); (A.-I.C.-S.); (L.M.-M.)
- Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, 45600 Talavera de la Reina, Spain
| | - Alfredo Lerín-Calvo
- Neruon Neurobotic S.L., 28015 Madrid, Spain;
- Department of Physiotherapy, Faculty of Health Sciences, University La Salle, 28023 Madrid, Spain
| | - Antonio Segura-Fragoso
- Faculty of Health Sciences, University of Castilla-La Mancha, 45600 Talavera de la Reina, Spain; (J.J.B.-J.); (A.S.-G.); (J.L.M.-C.); (A.S.-F.); (P.A.C.-G.); (A.-I.C.-S.); (L.M.-M.)
- Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, 45600 Talavera de la Reina, Spain
| | - Francisco Martín-Rodríguez
- Faculty of Medicine, University of Valladolid, 47005 Valladolid, Spain;
- Advanced Life Support, Emergency Medical Services (SACYL), 47007 Valladolid, Spain
| | - Pablo A. Cantero-Garlito
- Faculty of Health Sciences, University of Castilla-La Mancha, 45600 Talavera de la Reina, Spain; (J.J.B.-J.); (A.S.-G.); (J.L.M.-C.); (A.S.-F.); (P.A.C.-G.); (A.-I.C.-S.); (L.M.-M.)
- Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, 45600 Talavera de la Reina, Spain
| | - Ana-Isabel Corregidor-Sánchez
- Faculty of Health Sciences, University of Castilla-La Mancha, 45600 Talavera de la Reina, Spain; (J.J.B.-J.); (A.S.-G.); (J.L.M.-C.); (A.S.-F.); (P.A.C.-G.); (A.-I.C.-S.); (L.M.-M.)
- Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, 45600 Talavera de la Reina, Spain
| | - Laura Mordillo-Mateos
- Faculty of Health Sciences, University of Castilla-La Mancha, 45600 Talavera de la Reina, Spain; (J.J.B.-J.); (A.S.-G.); (J.L.M.-C.); (A.S.-F.); (P.A.C.-G.); (A.-I.C.-S.); (L.M.-M.)
- Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, 45600 Talavera de la Reina, Spain
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16
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Andalib S, Divani AA, Ayata C, Baig S, Arsava EM, Topcuoglu MA, Cáceres EL, Parikh V, Desai MJ, Majid A, Girolami S, Di Napoli M. Vagus Nerve Stimulation in Ischemic Stroke. Curr Neurol Neurosci Rep 2023; 23:947-962. [PMID: 38008851 PMCID: PMC10841711 DOI: 10.1007/s11910-023-01323-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/30/2023] [Indexed: 11/28/2023]
Abstract
PURPOSE OF REVIEW Vagus nerve stimulation (VNS) has emerged as a potential therapeutic approach for neurological and psychiatric disorders. In recent years, there has been increasing interest in VNS for treating ischemic stroke. This review discusses the evidence supporting VNS as a treatment option for ischemic stroke and elucidates its underlying mechanisms. RECENT FINDINGS Preclinical studies investigating VNS in stroke models have shown reduced infarct volumes and improved neurological deficits. Additionally, VNS has been found to reduce reperfusion injury. VNS may promote neuroprotection by reducing inflammation, enhancing cerebral blood flow, and modulating the release of neurotransmitters. Additionally, VNS may stimulate neuroplasticity, thereby facilitating post-stroke recovery. The Food and Drug Administration has approved invasive VNS (iVNS) combined with rehabilitation for ischemic stroke patients with moderate to severe upper limb deficits. However, iVNS is not feasible in acute stroke due to its time-sensitive nature. Non-invasive VNS (nVNS) may be an alternative approach for treating ischemic stroke. While the evidence from preclinical studies and clinical trials of nVNS is promising, the mechanisms through which VNS exerts its beneficial effects on ischemic stroke are still being elucidated. Therefore, further research is needed to better understand the efficacy and underlying mechanisms of nVNS in ischemic stroke. Moreover, large-scale randomized clinical trials are necessary to determine the optimal nVNS protocols, assess its long-term effects on stroke recovery and outcomes, and identify the potential benefits of combining nVNS with other rehabilitation strategies.
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Affiliation(s)
- Sasan Andalib
- Research Unit of Neurology, Department of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
- Department of Neurology, Odense University Hospital, Odense, Denmark
| | - Afshin A Divani
- Department of Neurology, School of Medicine, University of New Mexico, Albuquerque, NM, 87131, USA.
| | - Cenk Ayata
- Neurovascular Research Unit, Department of Radiology and Stroke Service, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Sheharyar Baig
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
| | - Ethem Murat Arsava
- Department of Neurology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | | | | | - Vinay Parikh
- Department of Psychology and Neuroscience, Temple University, Philadelphia, PA, USA
| | - Masoom J Desai
- Department of Neurology, School of Medicine, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Arshad Majid
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
| | - Sara Girolami
- Neurological Service, SS Annunziata Hospital, Sulmona, L'Aquila, Italy
| | - Mario Di Napoli
- Neurological Service, SS Annunziata Hospital, Sulmona, L'Aquila, Italy
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17
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Gunduz ME, Bucak B, Keser Z. Advances in Stroke Neurorehabilitation. J Clin Med 2023; 12:6734. [PMID: 37959200 PMCID: PMC10650295 DOI: 10.3390/jcm12216734] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
Stroke is one of the leading causes of disability worldwide despite recent advances in hyperacute interventions to lessen the initial impact of stroke. Stroke recovery therapies are crucial in reducing the long-term disability burden after stroke. Stroke recovery treatment options have rapidly expanded within the last decade, and we are in the dawn of an exciting era of multimodal therapeutic approaches to improve post-stroke recovery. In this narrative review, we highlighted various promising advances in treatment and technologies targeting stroke rehabilitation, including activity-based therapies, non-invasive and minimally invasive brain stimulation techniques, robotics-assisted therapies, brain-computer interfaces, pharmacological treatments, and cognitive therapies. These new therapies are targeted to enhance neural plasticity as well as provide an adequate dose of rehabilitation and improve adherence and participation. Novel activity-based therapies and telerehabilitation are promising tools to improve accessibility and provide adequate dosing. Multidisciplinary treatment models are crucial for post-stroke neurorehabilitation, and further adjuvant treatments with brain stimulation techniques and pharmacological agents should be considered to maximize the recovery. Among many challenges in the field, the heterogeneity of patients included in the study and the mixed methodologies and results across small-scale studies are the cardinal ones. Biomarker-driven individualized approaches will move the field forward, and so will large-scale clinical trials with a well-targeted patient population.
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Affiliation(s)
- Muhammed Enes Gunduz
- Department of Neurology, University of Massachusetts Chan Medical School, Worcester, MA 01655, USA
| | - Bilal Bucak
- Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA; (B.B.); (Z.K.)
| | - Zafer Keser
- Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA; (B.B.); (Z.K.)
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18
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Wang MX, Wumiti A, Zhang YW, Gao XS, Huang Z, Zhang MF, Peng ZY, Oku Y, Tang ZM. Transcutaneous cervical vagus nerve stimulation improved motor cortex excitability in healthy adults: a randomized, single-blind, self-crossover design study. Front Neurosci 2023; 17:1234033. [PMID: 37854293 PMCID: PMC10579560 DOI: 10.3389/fnins.2023.1234033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 09/18/2023] [Indexed: 10/20/2023] Open
Abstract
Purpose To investigate the effect of transcutaneous cervical vagus nerve stimulation (tcVNS) on motor cortex excitability in healthy adults. Method Twenty eight healthy subjects were assigned to receive real and sham tcVNS for 30 min. The interval between the real and sham conditions was more than 24 h, and the sequence was random. The central and peripheral motor-evoked potential (MEP) of the right first dorsal interosseous (FDI) muscle was measured by transcranial magnetic stimulation (TMS) before and after stimulation. MEP latency, MEP amplitude and rest motor threshold (rMT) were analyzed before and after stimulation. Results MEP amplitude, MEP latency and rMT had significant interaction effect between time points and conditions (p < 0.05). After real stimulation, the MEP amplitude was significantly increased (p < 0.001). MEP latency (p < 0.001) and rMT (p = 0.006) was decreased than that of baseline. The MEP amplitude on real condition was higher than that of sham stimulation after stimulation (p = 0.027). The latency after the real stimulation was significantly shorter than that after sham stimulation (p = 0.005). No significantly difference was found in rMT after stimulation between real and sham conditions (p > 0.05). Conclusion tcVNS could improve motor cortex excitability in healthy adults.
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Affiliation(s)
- Meng-Xin Wang
- Department of Rehabilitation Medicine, Yuedong Hospital, The Third Affiliated Hospital of Sun Yat-sen University, Meizhou, China
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Aihaiti Wumiti
- Department of Rehabilitation Medicine, Yuedong Hospital, The Third Affiliated Hospital of Sun Yat-sen University, Meizhou, China
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yao-Wen Zhang
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xue-Sheng Gao
- Rehabilitation Medicine Department, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Zi Huang
- Department of Rehabilitation Medicine, Yuedong Hospital, The Third Affiliated Hospital of Sun Yat-sen University, Meizhou, China
| | - Meng-Fei Zhang
- Department of Rehabilitation Medicine, Yuedong Hospital, The Third Affiliated Hospital of Sun Yat-sen University, Meizhou, China
| | - Zhi-Yong Peng
- Department of Rehabilitation Medicine, Yuedong Hospital, The Third Affiliated Hospital of Sun Yat-sen University, Meizhou, China
| | - Yoshitaka Oku
- Department of Physiology, Hyogo Medical University, Hyogo, Japan
| | - Zhi-Ming Tang
- Department of Rehabilitation Medicine, Yuedong Hospital, The Third Affiliated Hospital of Sun Yat-sen University, Meizhou, China
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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19
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Shibata S, Takahashi H, Miida Y, Mima T, Onishi H. Priming effects of transcutaneous vagus nerve stimulation on the neuromodulation induced by transcranial static magnetic field stimulation in human motor cortex. Clin Neurophysiol 2023; 154:194-197. [PMID: 37647834 DOI: 10.1016/j.clinph.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/05/2023] [Accepted: 08/08/2023] [Indexed: 09/01/2023]
Affiliation(s)
- Sumiya Shibata
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata-shi, Niigata ZIP: 950-3198, Japan; Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata-shi, Niigata ZIP: 950-3198, Japan.
| | - Hirotaka Takahashi
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata-shi, Niigata ZIP: 950-3198, Japan
| | - Yu Miida
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata-shi, Niigata ZIP: 950-3198, Japan
| | - Tatsuya Mima
- The Graduate School of Core Ethics and Frontier Sciences, Ritsumeikan University, 56-1, Tojiin, Kitamachi, Kita-ku, Kyoto ZIP: 603-8577, Japan
| | - Hideaki Onishi
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata-shi, Niigata ZIP: 950-3198, Japan; Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata-shi, Niigata ZIP: 950-3198, Japan
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Ahmed I, Mustafaoglu R, Rossi S, Cavdar FA, Agyenkwa SK, Pang MYC, Straudi S. Non-invasive Brain Stimulation Techniques for the Improvement of Upper Limb Motor Function and Performance in Activities of Daily Living After Stroke: A Systematic Review and Network Meta-analysis. Arch Phys Med Rehabil 2023; 104:1683-1697. [PMID: 37245690 DOI: 10.1016/j.apmr.2023.04.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/21/2023] [Accepted: 04/22/2023] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To compare the efficacy of non-invasive brain stimulation (NiBS) such as transcranial direct current stimulation (tDCS), repetitive transcranial magnetic stimulation (rTMS), theta-burst stimulation (TBS), and transcutaneous vagus nerve stimulation (taVNS) in upper limb stroke rehabilitation. DATA SOURCES PubMed, Web of Science, and Cochrane databases were searched from January 2010 to June 2022. DATA SELECTION Randomized controlled trials (RCTs) assessing the effects of "tDCS", "rTMS", "TBS", or "taVNS" on upper limb motor function and performance in activities of daily livings (ADLs) after stroke. DATA EXTRACTION Data were extracted by 2 independent reviewers. Risk of bias was evaluated with the Cochrane Risk of Bias tool. DATA SYNTHESIS 87 RCTs with 3750 participants were included. Pairwise meta-analysis showed that all NiBS except continuous TBS (cTBS) and cathodal tDCS were significantly more efficacious than sham stimulation for motor function (standardized mean difference [SMD] range 0.42-1.20), whereas taVNS, anodal tDCS, and both low and high frequency rTMS were significantly more efficacious than sham stimulation for ADLs (SMD range 0.54-0.99). NMA showed that taVNS was more effective than cTBS (SMD:1.00; 95% CI (0.02-2.02)), cathodal tDCS (SMD:1.07; 95% CI (0.21-1.92)), and Physical rehabilitation alone (SMD:1.46; 95% CI (0.59-2.33)) for improving motor function. P-score found that taVNS is best ranked treatment in improving motor function (SMD: 1.20; 95% CI (0.46-1.95)) and ADLs (SMD:1.20; 95% CI (0.45-1.94)) after stroke. After taVNS, excitatory stimulation protocols (intermittent TBS, anodal tDCS, and HF-rTMS) are most effective in improving motor function and ADLs after acute/sub-acute (SMD range 0.53-1.63) and chronic stroke (SMD range 0.39-1.16). CONCLUSIONS Evidence suggests that excitatory stimulation protocols are the most promising intervention in improving upper limb motor function and performance in ADLs. taVNS appeared to be a promising intervention for stroke patients, but further large RCTs are required to confirm its relative superiority.
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Affiliation(s)
- Ishtiaq Ahmed
- Pain in Motion International Research Group, Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium; Istanbul University-Cerrahpasa, Institute of Graduate Studies, Department of Physiotherapy and Rehabilitation, Istanbul, Turkey.
| | - Rustem Mustafaoglu
- Istanbul University-Cerrahpasa, Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, Istanbul, Turkey
| | - Simone Rossi
- Department of Medicine, Surgery, and Neuroscience, Si-BIN Lab, Human Physiology Section, Neurology and Clinical Neurophysiology Unit, University of Siena, Siena, Italy
| | - Fatih A Cavdar
- Istanbul University-Cerrahpasa, Institute of Graduate Studies, Department of Physiotherapy and Rehabilitation, Istanbul, Turkey; Istanbul Okan University, Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, Istanbul, Turkey
| | - Seth Kwame Agyenkwa
- Istanbul University-Cerrahpasa, Institute of Graduate Studies, Department of Physiotherapy and Rehabilitation, Istanbul, Turkey
| | - Marco Y C Pang
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong
| | - Sofia Straudi
- Neuroscience and Rehabilitation Department, Ferrara University, Ferrara, Italy
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Baig SS, Kamarova M, Bell SM, Ali AN, Su L, Dimairo M, Dawson J, Redgrave JN, Majid A. tVNS in Stroke: A Narrative Review on the Current State and the Future. Stroke 2023; 54:2676-2687. [PMID: 37646161 DOI: 10.1161/strokeaha.123.043414] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Ischemic stroke is a leading cause of disability and there is a paucity of therapeutic strategies that promote functional recovery after stroke. Transcutaneous vagus nerve stimulation (tVNS) has shown promising evidence as a tool to reduce infarct size in animal models of hyperacute stroke. In chronic stroke, tVNS paired with limb movements has been shown to enhance neurological recovery. In this review, we summarize the current evidence for tVNS in preclinical models and clinical trials in humans. We highlight the mechanistic pathways involved in the beneficial effects of tVNS. We critically evaluate the current gaps in knowledge and recommend the key areas of research required to translate tVNS into clinical practice in acute and chronic stroke.
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Affiliation(s)
- Sheharyar S Baig
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, United Kingdom (S.S.B., M.K., S.M.B., A.N.A., L.S., J.N.R., A.M.)
| | - Marharyta Kamarova
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, United Kingdom (S.S.B., M.K., S.M.B., A.N.A., L.S., J.N.R., A.M.)
| | - Simon M Bell
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, United Kingdom (S.S.B., M.K., S.M.B., A.N.A., L.S., J.N.R., A.M.)
| | - Ali N Ali
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, United Kingdom (S.S.B., M.K., S.M.B., A.N.A., L.S., J.N.R., A.M.)
| | - Li Su
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, United Kingdom (S.S.B., M.K., S.M.B., A.N.A., L.S., J.N.R., A.M.)
| | - Munya Dimairo
- School of Health and Related Research, University of Sheffield, United Kingdom (M.D.)
| | - Jesse Dawson
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Queen Elizabeth University Hospital, United Kingdom (J.D.)
| | - Jessica N Redgrave
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, United Kingdom (S.S.B., M.K., S.M.B., A.N.A., L.S., J.N.R., A.M.)
| | - Arshad Majid
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, United Kingdom (S.S.B., M.K., S.M.B., A.N.A., L.S., J.N.R., A.M.)
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22
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Shi X, Zhao J, Xu S, Ren M, Wu Y, Chen X, Zhou Z, Chen S, Huang Y, Li Y, Shan C. Clinical Research Progress of the Post-Stroke Upper Limb Motor Function Improvement via Transcutaneous Auricular Vagus Nerve Stimulation. Neural Plast 2023; 2023:9532713. [PMID: 37789954 PMCID: PMC10545466 DOI: 10.1155/2023/9532713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 06/24/2023] [Accepted: 08/22/2023] [Indexed: 10/05/2023] Open
Abstract
Stroke is a disease with high morbidity and disability, and motor impairment is a common sequela of stroke. Transcutaneous auricular vagus nerve stimulation (taVNS) is a type of non-invasive stimulation, which can effectively improve post-stroke motor dysfunction. This review discusses stimulation parameters, intervention timing, and the development of innovative devices for taVNS. We further summarize the application of taVNS in improving post-stroke upper limb motor function to further promote the clinical research and application of taVNS in the rehabilitation of post-stroke upper limb motor dysfunction.
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Affiliation(s)
- Xiaolong Shi
- Department of Rehabilitation Medicine, Tong Ren Hospital, Shanghai Jiao Tong University School of Medicine, 200336, Shanghai, China
- Institute of Rehabilitation, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China
| | - Jingjun Zhao
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China
| | - Shutian Xu
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China
- Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation, Ministry of Education, 201203, Shanghai, China
| | - Meng Ren
- Institute of Rehabilitation, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China
| | - Yuwei Wu
- Department of Rehabilitation Medicine, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, 200437, Shanghai, China
| | - Xixi Chen
- Institute of Rehabilitation, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China
| | - Zhiqing Zhou
- Institute of Rehabilitation, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China
| | - Songmei Chen
- Shanghai No.3 Rehabilitation Hospital, 200436, Shanghai, China
| | - Yu Huang
- Institute of Rehabilitation, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China
| | - Yuanli Li
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China
- Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation, Ministry of Education, 201203, Shanghai, China
| | - Chunlei Shan
- Department of Rehabilitation Medicine, Tong Ren Hospital, Shanghai Jiao Tong University School of Medicine, 200336, Shanghai, China
- Institute of Rehabilitation, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
- Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation, Ministry of Education, 201203, Shanghai, China
- Department of Rehabilitation Medicine, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, 200437, Shanghai, China
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23
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Abdullahi A, Wong TWL, Ng SSM. Effects and safety of vagus nerve stimulation on upper limb function in patients with stroke: a systematic review and meta-analysis. Sci Rep 2023; 13:15415. [PMID: 37723225 PMCID: PMC10507009 DOI: 10.1038/s41598-023-42077-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 09/05/2023] [Indexed: 09/20/2023] Open
Abstract
Vagus nerve stimulation (VNS) is used to deliver electric current to stimulate the vagus nerve. The aim of this study is to carry out a systematic review and meta-analysis to determine its effects on motor function in patients with stroke. PubMED, Embase, Web of Science (WoS), and Scopus were searched. Data on time since stroke, and mean scores and standard deviation on outcomes such as level of impairment and motor function were extracted. The results showed that invasive (MD 2.66, 95% CI 1.19-4.13, P = 0.0004) and non-invasive (MD 24.16, 95% CI 23.56-24.75, P = 0.00001) VNS are superior at improving level of motor impairment than the control post intervention and at follow-up respectively. Similarly, VNS improved motor function post intervention (MD 0.28, 95% CI 0.15-0.41, P < 0.0001); and there was no significant difference in adverse events between invasive VNS and control (OR 2.15, 95% CI 0.97-4.74, P = 0.06), and between non-invasive VNS and control (OR 4.54, 95% CI 0.48-42.97, P = 0.19). VNS can be used to improve motor function in patients with stroke.
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Affiliation(s)
- Auwal Abdullahi
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, Special Administrative Region, China
| | - Thomson W L Wong
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, Special Administrative Region, China
| | - Shamay S M Ng
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, Special Administrative Region, China.
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24
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Ierardi E, Eilbeck JC, van Wijck F, Ali M, Coupar F. Data mining versus manual screening to select papers for inclusion in systematic reviews: a novel method to increase efficiency. Int J Rehabil Res 2023; 46:284-292. [PMID: 37477349 DOI: 10.1097/mrr.0000000000000595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
Systematic reviews rely on identification of studies, initially through electronic searches yielding potentially thousands of studies, and then reviewer-led screening studies for inclusion. This standard method is time- and resource-intensive. We designed and applied an algorithm written in Python involving computer-aided identification of keywords within each paper for an exemplar systematic review of arm impairment after stroke. The standard method involved reading each abstract searching for these keywords. We compared the methods in terms of accuracy in identification of keywords, abstracts' eligibility, and time taken to make a decision about eligibility. For external validation, we adapted the algorithm for a different systematic review, and compared eligible studies using the algorithm with those included in that review. For the exemplar systematic review, the algorithm failed on 72 out of 2,789 documents retrieved (2.6%). Both methods identified the same 610 studies for inclusion. Based on a sample of 21 randomly selected abstracts, the standard screening took 1.58 ± 0.26 min per abstract. Computer output screening took 0.43 ± 0.14 min per abstract. The mean difference between the two methods was 1.15 min ( P < 0.0001), saving 73% per abstract. For the other systematic review, use of the algorithm resulted in the same studies being identified. One study was excluded based on the interpretation of the comparison intervention. Our purpose-built software was an accurate and significantly time-saving method for identifying eligible abstracts for inclusion in systematic reviews. This novel method could be adapted for other systematic reviews in future for the benefit of authors, reviewers and editors.
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Affiliation(s)
- Elena Ierardi
- Department of Occupational Therapy, and Human Nutrition and Dietetics, School of Health and Life Sciences, Glasgow Caledonian University, Glasgow
| | - J Chris Eilbeck
- Department of Mathematics, School of Mathematical and Computer Sciences and Maxwell Institute, Heriot-Watt University, Edinburgh
| | - Frederike van Wijck
- Department of Physiotherapy and Paramedicine, School of Health and Life Sciences, Glasgow Caledonian University, Glasgow
| | - Myzoon Ali
- School of Cardiovascular and Metabolic Health, University of Glasgow
- NMAHP Research Unit, Glasgow Caledonian University, Glasgow, UK
| | - Fiona Coupar
- Department of Occupational Therapy, and Human Nutrition and Dietetics, School of Health and Life Sciences, Glasgow Caledonian University, Glasgow
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25
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Hua K, Cummings M, Bernatik M, Brinkhaus B, Usichenko T, Dietzel J. Cardiovascular effects of auricular stimulation -a systematic review and meta-analysis of randomized controlled clinical trials. Front Neurosci 2023; 17:1227858. [PMID: 37727325 PMCID: PMC10505819 DOI: 10.3389/fnins.2023.1227858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 08/17/2023] [Indexed: 09/21/2023] Open
Abstract
Background The number of randomized controlled trials using auricular stimulation (AS) such as transauricular vagus nerve stimulation, or other auricular electrostimulation or auricular acupuncture or acupressure, in experimental and clinical settings, has increased markedly over the last three decades. This systematic review focusses on cardiovascular effects of auricular stimulation. Methods and analysis The following databases were searched: MEDLINE (PubMed), EMBASE, Cochrane Central Register of Controlled Trials (CENTRAL), ISI Web of Science, and Scopus Database. RCTs were reviewed that had been published in English and European languages. Data collection and analysis was conducted by two reviewers independently. Quality and risk assessment of included studies was performed and the meta-analysis of the effect of the most frequently assessed biomarkers. Results Altogether, 78 trials were included. 38 studies assessed heart rate (HR), 19 studies analyzed heart rate variability (HRV), 31 studies analyzed blood pressure (BP) and 7 studies were identified that measured oxygen saturation (O2), 2 studies on baroreflex sensitivity and 2 studies on skin conductance were evaluated in this review. 26 studies contained continuous data and were eligible for meta-analysis, 50 trials reported non continuous data and were evaluated descriptively. The overall quality of the studies was moderate to low. AS leads to a significant reduction of HR, the changes though were not considered an adverse reaction. Furthermore, when looking at HRV, AS was able to reduce the LF/HF ratio significantly compared to control procedures. No other cardiovascular parameters (blood pressure, oxygen saturation, baroreflex sensitivity) were changed significantly. AS produced only minor side effects in all trials. Conclusion AS can lead to clinically safe reduction of HR and changes in the LF/HF ratio of the HRV, which is presumably via an increase in vagal activity. More research is needed to clarify whether AS can be used to modulate tachycardia or indications with autonomic imbalance. Systematic review registration https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=231885 PROSPERO, ID CRD42021231885.
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Affiliation(s)
- Kevin Hua
- Institute for Social Medicine, Epidemiology and Health Economics, Berlin Institute of Health, Charité - University Medicine, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Mike Cummings
- British Medical Acupuncture Society, London, United Kingdom
| | | | - Benno Brinkhaus
- Institute for Social Medicine, Epidemiology and Health Economics, Berlin Institute of Health, Charité - University Medicine, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Taras Usichenko
- Department for Anesthesiology, University Hospital Greifswald, Greifswald, Germany
- Department of Anesthesia, McMaster University, Hamilton, ON, Canada
| | - Joanna Dietzel
- Institute for Social Medicine, Epidemiology and Health Economics, Berlin Institute of Health, Charité - University Medicine, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
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26
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Evancho A, Tyler WJ, McGregor K. A review of combined neuromodulation and physical therapy interventions for enhanced neurorehabilitation. Front Hum Neurosci 2023; 17:1151218. [PMID: 37545593 PMCID: PMC10400781 DOI: 10.3389/fnhum.2023.1151218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 06/30/2023] [Indexed: 08/08/2023] Open
Abstract
Rehabilitation approaches for individuals with neurologic conditions have increasingly shifted toward promoting neuroplasticity for enhanced recovery and restoration of function. This review focuses on exercise strategies and non-invasive neuromodulation techniques that target neuroplasticity, including transcranial magnetic stimulation (TMS), vagus nerve stimulation (VNS), and peripheral nerve stimulation (PNS). We have chosen to focus on non-invasive neuromodulation techniques due to their greater potential for integration into routine clinical practice. We explore and discuss the application of these interventional strategies in four neurological conditions that are frequently encountered in rehabilitation settings: Parkinson's Disease (PD), Traumatic Brain Injury (TBI), stroke, and Spinal Cord Injury (SCI). Additionally, we discuss the potential benefits of combining non-invasive neuromodulation with rehabilitation, which has shown promise in accelerating recovery. Our review identifies studies that demonstrate enhanced recovery through combined exercise and non-invasive neuromodulation in the selected patient populations. We primarily focus on the motor aspects of rehabilitation, but also briefly address non-motor impacts of these conditions. Additionally, we identify the gaps in current literature and barriers to implementation of combined approaches into clinical practice. We highlight areas needing further research and suggest avenues for future investigation, aiming to enhance the personalization of the unique neuroplastic responses associated with each condition. This review serves as a resource for rehabilitation professionals and researchers seeking a comprehensive understanding of neuroplastic exercise interventions and non-invasive neuromodulation techniques tailored for specific diseases and diagnoses.
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Affiliation(s)
- Alexandra Evancho
- Department of Physical Therapy, School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, United States
| | - William J. Tyler
- Department of Biomedical Engineering, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- Department of Physical Medicine and Rehabilitation, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Keith McGregor
- Department of Clinical and Diagnostic Studies, School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, United States
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Wang X, Ding Q, Li T, Li W, Yin J, Li Y, Li Y, Zhuang W. Application of vagus nerve stimulation on the rehabilitation of upper limb dysfunction after stroke: a systematic review and meta-analysis. Front Neurol 2023; 14:1189034. [PMID: 37416314 PMCID: PMC10321132 DOI: 10.3389/fneur.2023.1189034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 05/16/2023] [Indexed: 07/08/2023] Open
Abstract
Objective This study aimed to elucidate the efficacy, safety, and long-term implications of vagus nerve stimulation (VNS) as a viable therapeutic option for patients with upper limb dysfunction following a stroke. Methods Data from the following libraries were searched from inception to December 2022: PubMed, Wanfang, Scopus, China Science and Technology Journal Database, Embase, Web of Science, China Biology Medicine Disc, Cochrane Library, and China National Knowledge Infrastructure. Outcomes included indicators of upper limb motor function, indicators of prognosis, and indicators of safety (incidence of adverse events [AEs] and serious AEs [SAEs]). Two of the authors extracted the data independently. A third researcher arbitrated when disputes occurred. The quality of each eligible study was evaluated using the Cochrane Risk of Bias tool. Meta-analysis and bias analysis were performed using Stata (version 16.0) and RevMan (version 5.3). Results Ten trials (VNS combined with rehabilitation group vs. no or sham VNS combined with rehabilitation group) with 335 patients were included in the meta-analysis. Regarding upper extremity motor function, based on Fugl-Meyer assessment scores, VNS combined with other treatment options had immediate (mean difference [MD] = 2.82, 95% confidence interval [CI] = 1.78-3.91, I2 = 62%, p < 0.00001) and long-term (day-30 MD = 4.20, 95% CI = 2.90-5.50, p < 0.00001; day-90 MD = 3.27, 95% CI = 1.67-4.87, p < 0.00001) beneficial effects compared with that of the control treatment. Subgroup analyses showed that transcutaneous VNS (MD = 2.87, 95% CI = 1.78-3.91, I2 = 62%, p < 0.00001) may be superior to invasive VNS (MD = 3.56, 95% CI = 1.99-5.13, I2 = 77%, p < 0.0001) and that VNS combined with integrated treatment (MD = 2.87, 95% CI = 1.78-3.91, I2 = 62%, p < 0.00001) is superior to VNS combined with upper extremity training alone (MD = 2.24, 95% CI = 0.55-3.93, I2 = 48%, p = 0.009). Moreover, lower frequency VNS (20 Hz) (MD = 3.39, 95% CI = 2.06-4.73, I2 = 65%, p < 0.00001) may be superior to higher frequency VNS (25 Hz or 30 Hz) (MD = 2.29, 95% CI = 0.27-4.32, I2 = 58%, p = 0,03). Regarding prognosis, the VNS group outperformed the control group in the activities of daily living (standardized MD = 1.50, 95% CI = 1.10-1.90, I2 = 0%, p < 0.00001) and depression reduction. In contrast, quality of life did not improve (p = 0.51). Safety was not significantly different between the experimental and control groups (AE p = 0.25; SAE p = 0.26). Conclusion VNS is an effective and safe treatment for upper extremity motor dysfunction after a stroke. For the functional restoration of the upper extremities, noninvasive integrated therapy and lower-frequency VNS may be more effective. In the future, further high-quality studies with larger study populations, more comprehensive indicators, and thorough data are required to advance the clinical application of VNS. Systematic review registration https://www.crd.york.ac.uk/prospero/, identifier: CRD42023399820.
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Affiliation(s)
- Xu Wang
- School of Rehabilitation Medicine, Henan University of Chinese Medicine, Zhengzhou, China
| | - Qixin Ding
- School of Rehabilitation Medicine, Henan University of Chinese Medicine, Zhengzhou, China
| | - Tianshu Li
- School of Clinical Medicine, Henan University, Zhengzhou, China
| | - Wanyue Li
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Jialin Yin
- Department of Rehabilitation, Henan Provincial People's Hospital, School of Rehabilitation Medicine, Henan University of Chinese Medicine, Zhengzhou, China
| | - Yakun Li
- Department of Rehabilitation, Henan Provincial People's Hospital, School of Rehabilitation Medicine, Henan University of Chinese Medicine, Zhengzhou, China
| | - Yuefang Li
- School of Clinical Medicine, Henan University, Zhengzhou, China
| | - Weisheng Zhuang
- Department of Rehabilitation, Henan Provincial People's Hospital, School of Rehabilitation Medicine, Henan University of Chinese Medicine, Zhengzhou, China
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28
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Colombo M, Aggujaro S, Lombardi N, Pedrocchi A, Molteni F, Guanziroli E. Motor and Cognitive Modulation of a Single Session of Transcutaneous Auricular Vagus Nerve Stimulation in Post Stroke Patients: A Pilot Study. IEEE OPEN JOURNAL OF ENGINEERING IN MEDICINE AND BIOLOGY 2023; 4:292-299. [PMID: 38196973 PMCID: PMC10776103 DOI: 10.1109/ojemb.2023.3268011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/30/2023] [Accepted: 04/12/2023] [Indexed: 01/11/2024] Open
Abstract
Objective: The aim of the present study is to explore whether a single session of transcutaneous Vagus Nerve Stimulation (tVNS) can enhance the ipsilesional, and contralesional upper limb motor functions as well as cognitive functions in stroke patients. The effects of the stimulation were evaluated through two different tasks: the box and blocks test (BB), indexing manual dexterity, and the Go/No-go task, a visuomotor paradigm used to assess both motor readiness and response inhibition. Tests were administered without tVNS, during tVNS and during sham tVNS. Results: The BB showed a statistical difference for both contralesional side (p = 0.05) between Basal-Real condition (p = 0.042) and ipsilesional side (p = 0.001) between Basal-Real (p = 0.008) and for Real-Sham (p = 0.005). Any statistical difference was found for the mean latencies in the three conditions of the Go/No-go test. Conclusion: A single session of tVNS seems to improve upper limb motor functions but not cognitive functions in post-stroke patients, despite a positive trend was detected.
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Affiliation(s)
- M. Colombo
- Villa Beretta Rehabilitation Center Costa Masnaga – Lecco23845ComoItaly
| | - S. Aggujaro
- Villa Beretta Rehabilitation Center Costa Masnaga – Lecco23845ComoItaly
| | - N. Lombardi
- Villa Beretta Rehabilitation Center Costa Masnaga – Lecco23845ComoItaly
| | - A. Pedrocchi
- Nearlab, Department of Electronics, Informatics and BioengineeringPolitecnico di Milano20133MilanItaly
| | - F. Molteni
- Villa Beretta Rehabilitation Center Costa Masnaga – Lecco23845ComoItaly
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29
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Downes MH, Kalagara R, Chennareddy S, Vasan V, Reford E, Schuldt BR, Odland I, Tosto-Mancuso J, Putrino D, Panov F, Kellner CP. Vagal Nerve Stimulation: A Bibliometric Analysis of Current Research Trends. Neuromodulation 2023; 26:529-537. [PMID: 35970764 DOI: 10.1016/j.neurom.2022.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 06/23/2022] [Accepted: 07/01/2022] [Indexed: 11/17/2022]
Abstract
BACKGROUND Vagal nerve stimulation (VNS) has become established as an effective tool for the management of various neurologic disorders. Consequently, a growing number of VNS studies have been published over the past four decades. This study presents a bibliometric analysis investigating the current trends in VNS literature. MATERIALS AND METHODS Using the Web of Science collection data base, a search was performed to identify literature that discussed applications of VNS from 2000 to 2021. Analysis and visualization of the included literature were completed with VOSviewer. RESULTS A total of 2895 publications were identified. The number of articles published in this area has increased over the past two decades, with the most citations (7098) occurring in 2021 and the most publications (270) in 2020. The h-index, i-10, and i-100 were 97, 994, and 91, respectively, with 17.0 citations per publication on average. The highest-producing country and institution of VNS literature were the United States and the University of Texas, respectively. The most productive journal was Epilepsia. Epilepsy was the predominant focus of VNS research, with the keyword "epilepsy" having the greatest total link strength (749) in the keyword analysis. The keyword analysis also revealed two major avenues of VNS research: 1) the mechanisms by which VNS modulates neural circuitry, and 2) therapeutic applications of VNS in a variety of diseases beyond neurology. It also showed a significant prevalence of noninvasive VNS research. Although epilepsy research appears more linked to implanted VNS, headache and depression specialists were more closely associated with noninvasive VNS. CONCLUSION VNS may serve as a promising intervention for rehabilitation beyond neurologic applications, with an expanding base of literature over the past two decades. Although epilepsy researchers have produced most current literature, other fields have begun to explore VNS as a potential treatment, likely owing to the rise of noninvasive forms of VNS.
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Affiliation(s)
- Margaret H Downes
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Roshini Kalagara
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Susmita Chennareddy
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Vikram Vasan
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Emma Reford
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Braxton R Schuldt
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ian Odland
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jenna Tosto-Mancuso
- Abilities Research Center, Department of Rehabilitation and Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - David Putrino
- Abilities Research Center, Department of Rehabilitation and Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Fedor Panov
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Christopher P Kellner
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Li KP, Wu JJ, Zhou ZL, Xu DS, Zheng MX, Hua XY, Xu JG. Noninvasive Brain Stimulation for Neurorehabilitation in Post-Stroke Patients. Brain Sci 2023; 13:brainsci13030451. [PMID: 36979261 PMCID: PMC10046557 DOI: 10.3390/brainsci13030451] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 03/09/2023] Open
Abstract
Characterized by high morbidity, mortality, and disability, stroke usually causes symptoms of cerebral hypoxia due to a sudden blockage or rupture of brain vessels, and it seriously threatens human life and health. Rehabilitation is the essential treatment for post-stroke patients suffering from functional impairments, through which hemiparesis, aphasia, dysphagia, unilateral neglect, depression, and cognitive dysfunction can be restored to various degrees. Noninvasive brain stimulation (NIBS) is a popular neuromodulatory technology of rehabilitation focusing on the local cerebral cortex, which can improve clinical functions by regulating the excitability of corresponding neurons. Increasing evidence has been obtained from the clinical application of NIBS, especially repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS). However, without a standardized protocol, existing studies on NIBS show a wide variation in terms of stimulation site, frequency, intensity, dosage, and other parameters. Its application for neurorehabilitation in post-stroke patients is still limited. With advances in neuronavigation technologies, functional near-infrared spectroscopy, and functional MRI, specific brain regions can be precisely located for stimulation. On the basis of our further understanding on neural circuits, neuromodulation in post-stroke rehabilitation has also evolved from single-target stimulation to co-stimulation of two or more targets, even circuits and the network. The present study aims to review the findings of current research, discuss future directions of NIBS application, and finally promote the use of NIBS in post-stroke rehabilitation.
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Affiliation(s)
- Kun-Peng Li
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Jia-Jia Wu
- Center of Rehabilitation Medicine, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
| | - Zong-Lei Zhou
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China
| | - Dong-Sheng Xu
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Mou-Xiong Zheng
- Department of Traumatology and Orthopedics, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
- Correspondence: (M.-X.Z.); (X.-Y.H.); (J.-G.X.)
| | - Xu-Yun Hua
- Department of Traumatology and Orthopedics, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
- Correspondence: (M.-X.Z.); (X.-Y.H.); (J.-G.X.)
| | - Jian-Guang Xu
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
- Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation, Ministry of Education, Shanghai 201203, China
- Correspondence: (M.-X.Z.); (X.-Y.H.); (J.-G.X.)
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Wang Y, He Y, Jiang L, Chen X, Zou F, Yin Y, Li J, Li C, Zhang G, Ma J, Niu L. Effect of transcutaneous auricular vagus nerve stimulation on post-stroke dysphagia. J Neurol 2023; 270:995-1003. [PMID: 36329182 DOI: 10.1007/s00415-022-11465-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/28/2022] [Accepted: 10/28/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND PURPOSE It has been proved that electrical vagus nerve stimulation can promote the recovery of motor function after stroke. There were no trials on the use of transcutaneous auricular electrical vagus nerve stimulation (ta-VNS) in patients with dysphagia after acute stroke. Our aim was to confirm whether ta-VNS can promote the recovery of swallowing function in these acute stroke patients with dysphagia. METHODS We conducted a sham-controlled, double-blinded, parallel pilot study in 40 acute stroke patients randomly assigned to receive ta-VNS or sham ta-VNS combined with conventional rehabilitation training. The intensity of ta-VNS treatment was adjusted according to the patient's tolerance, 30 min each time, twice a day, five times a week, with a total course of 3 weeks. In the sham group, the parameters were the same except energy output. Swallowing function was assessed with Modified Mann assessment of swallowing ability (MASA), functional communication measure swallowing test (FCM), and the Rosenbek leakage/aspiration scale (RAS) according to swallowing video fluoroscopic (SVF) before the intervention (baseline, T0), immediately after the intervention (T1) and 4 weeks after the intervention (T2). RESULTS After treatment, ta-VNS group statistically and clinically had larger change of MASA, FCM, and RAS scores compared with control group (P < 0.05) and this improvement continued at least 4 weeks after the end of treatment. There were no serious adverse events occurred during the whole intervention. CONCLUSION The transcutaneous auricular electrical vagus nerve stimulation is effective as a novel and noninvasive treatment strategy for patients with dysphagia after acute stroke. TRIAL REGISTRATION No: kelunshen No. 63 in 2020.
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Affiliation(s)
- Ying Wang
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Yingxi He
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Linlin Jiang
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Xiaoxu Chen
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Fengjiao Zou
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Ying Yin
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Jiani Li
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Changqing Li
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Guifang Zhang
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Jingxi Ma
- Department of Neurology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, 401147, China
| | - Lingchuan Niu
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China.
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Loro A, Borg MB, Battaglia M, Amico AP, Antenucci R, Benanti P, Bertoni M, Bissolotti L, Boldrini P, Bonaiuti D, Bowman T, Capecci M, Castelli E, Cavalli L, Cinone N, Cosenza L, Di Censo R, Di Stefano G, Draicchio F, Falabella V, Filippetti M, Galeri S, Gimigliano F, Grigioni M, Invernizzi M, Jonsdottir J, Lentino C, Massai P, Mazzoleni S, Mazzon S, Molteni F, Morelli S, Morone G, Nardone A, Panzeri D, Petrarca M, Posteraro F, Santamato A, Scotti L, Senatore M, Spina S, Taglione E, Turchetti G, Varalta V, Picelli A, Baricich A. Balance Rehabilitation through Robot-Assisted Gait Training in Post-Stroke Patients: A Systematic Review and Meta-Analysis. Brain Sci 2023; 13:brainsci13010092. [PMID: 36672074 PMCID: PMC9856764 DOI: 10.3390/brainsci13010092] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/21/2022] [Accepted: 12/29/2022] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Balance impairment is a common disability in post-stroke survivors, leading to reduced mobility and increased fall risk. Robotic gait training (RAGT) is largely used, along with traditional training. There is, however, no strong evidence about RAGT superiority, especially on balance. This study aims to determine RAGT efficacy on balance of post-stroke survivors. METHODS PubMed, Cochrane Library, and PeDRO databases were investigated. Randomized clinical trials evaluating RAGT efficacy on post-stroke survivor balance with Berg Balance Scale (BBS) or Timed Up and Go test (TUG) were searched. Meta-regression analyses were performed, considering weekly sessions, single-session duration, and robotic device used. RESULTS A total of 18 trials have been included. BBS pre-post treatment mean difference is higher in RAGT-treated patients, with a pMD of 2.17 (95% CI 0.79; 3.55). TUG pre-post mean difference is in favor of RAGT, but not statistically, with a pMD of -0.62 (95%CI - 3.66; 2.43). Meta-regression analyses showed no relevant association, except for TUG and treatment duration (β = -1.019, 95% CI - 1.827; -0.210, p-value = 0.0135). CONCLUSIONS RAGT efficacy is equal to traditional therapy, while the combination of the two seems to lead to better outcomes than each individually performed. Robot-assisted balance training should be the focus of experimentation in the following years, given the great results in the first available trials. Given the massive heterogeneity of included patients, trials with more strict inclusion criteria (especially time from stroke) must be performed to finally define if and when RAGT is superior to traditional therapy.
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Affiliation(s)
- Alberto Loro
- Department of Health Sciences, Università del Piemonte Orientale “Amedeo Avogadro”, 28100 Novara, Italy
- Physical Medicine and Rehabilitation Unit, AOU Maggiore della Carità University Hospital, 28100 Novara, Italy
- Correspondence: or
| | - Margherita Beatrice Borg
- Department of Health Sciences, Università del Piemonte Orientale “Amedeo Avogadro”, 28100 Novara, Italy
- Physical Medicine and Rehabilitation Unit, AOU Maggiore della Carità University Hospital, 28100 Novara, Italy
| | - Marco Battaglia
- Department of Health Sciences, Università del Piemonte Orientale “Amedeo Avogadro”, 28100 Novara, Italy
- Physical Medicine and Rehabilitation Unit, AOU Maggiore della Carità University Hospital, 28100 Novara, Italy
| | - Angelo Paolo Amico
- Physical Medicine and Rehabilitation Unit, Polyclinic of Bari, 70124 Bari, Italy
| | - Roberto Antenucci
- Rehabilitation Unit, Castel San Giovanni Hospital, 29015 Piacenza, Italy
| | - Paolo Benanti
- Theology Department, Pontifical Gregorian University, 00187 Rome, Italy
| | - Michele Bertoni
- Physical Medicine and Rehabilitation, ASST Sette Laghi, 21100 Varese, Italy
| | - Luciano Bissolotti
- Casa di Cura Domus Salutis, Fondazione Teresa Camplani, 25100 Brescia, Italy
| | - Paolo Boldrini
- Robotic Rehabilitation Section, Italian Society of Physical and Rehabilitative Medicine (SIMFER), 00187 Rome, Italy
| | - Donatella Bonaiuti
- Robotic Rehabilitation Section, Italian Society of Physical and Rehabilitative Medicine (SIMFER), 00187 Rome, Italy
| | - Thomas Bowman
- Neurorehabilitation Department, IRCCS Fondazione Don Carlo Gnocchi, 20148 Milan, Italy
| | - Marianna Capecci
- Experimental and Clinic Medicine Department, Università Politecnica delle Marche (UNIVPM), 60126 Ancona, Italy
| | - Enrico Castelli
- Neurorehabilitation Unit, Bambino Gesù Children’s Hospital, 00165 Rome, Italy
| | - Loredana Cavalli
- Physical Medicine and Rehabilitation Unit, Centro Giusti, 50125 Florence, Italy
| | - Nicoletta Cinone
- Unit of Spasticity and Movement Disorders, Division of Physical Medicine and Rehabilitation, University Hospital of Foggia, 71100 Foggia, Italy
| | - Lucia Cosenza
- Rehabilitation Unit, Department of Rehabilitation, “Santi Antonio e Biagio e Cesare Arrigo” National Hospital, 15122 Alessandria, Italy
| | - Rita Di Censo
- Unit of Neurorehabilitation, Department of Neuroscience, Biomedicine, and Movement Sciences, University Hospital of Verona, University of Verona, 37126 Verona, Italy
| | - Giuseppina Di Stefano
- Robotic Rehabilitation Section, Italian Society of Physical and Rehabilitative Medicine (SIMFER), 00187 Rome, Italy
| | - Francesco Draicchio
- Dipartimento Medicina, Epidemiologia, Igiene del Lavoro e Ambientale, Istituto Nazionale Assicurazione Infortuni sul Lavoro (INAIL), 00192 Rome, Italy
| | - Vincenzo Falabella
- Italian Federation of Persons with Spinal Cord Injuries (FISH), 00197 Rome, Italy
| | - Mirko Filippetti
- Unit of Neurorehabilitation, Department of Neuroscience, Biomedicine, and Movement Sciences, University Hospital of Verona, University of Verona, 37126 Verona, Italy
| | - Silvia Galeri
- Neurorehabilitation Department, IRCCS Fondazione Don Carlo Gnocchi, 20148 Milan, Italy
| | - Francesca Gimigliano
- Department of Physical and Mental Health and Prevention Medicine, Luigi Vanvitelli University of Campania, 81100 Naples, Italy
| | - Mauro Grigioni
- Department of New Technologies in Public Healthcare, Italian National Institute of Health (ISS), 00161 Rome, Italy
| | - Marco Invernizzi
- Translational Medicine, Dipartimento Attività Integrate Ricerca e Innovazione (DAIRI), Azienda Ospedaliera Santi Antonio e Biagio e Cesare Arrigo, 15122 Alessandria, Italy
| | - Johanna Jonsdottir
- Neurorehabilitation Department, IRCCS Fondazione Don Carlo Gnocchi, 20148 Milan, Italy
| | - Carmelo Lentino
- Rehabilitation Unit, Santa Corona Hospital, 17027 Pietra Ligure, Italy
| | - Perla Massai
- Tuscany Rehabilitation Clinic, 52025 Montevarchi, Italy
| | - Stefano Mazzoleni
- Department of Electrical Engineering and Information Technology, Polytechnic University of Bari, 70126 Bari, Italy
- The BioRobotics Institute, Scuola Superiore Sant’Anna, 56025 Pontedera, Italy
| | - Stefano Mazzon
- Azienda Unità Locale Socio Sanitaria Euganea (AULSS 6), 35100 Padua, Italy
| | - Franco Molteni
- Rehabilitation Department, Valduce Villa Beretta Hospital, 23845 Costa Masnaga, Italy
| | - Sandra Morelli
- Department of New Technologies in Public Healthcare, Italian National Institute of Health (ISS), 00161 Rome, Italy
| | - Giovanni Morone
- Neurorehabilitation Unit, Santa Lucia Foundation IRCCS, 00179 Rome, Italy
| | - Antonio Nardone
- Pediatric, Diagnostical and Clinical-Surgical Sciences Department, University of Pavia, 27100 Pavia, Italy
- Neurorehabilitation Unit, Istituto Clinico-Scientifico Maugeri SPA IRCCS, 27100 Pavia, Italy
| | - Daniele Panzeri
- Pediatric Rehabilitation Unit, IRCCS Eugenio Medea, 23842 Bosisio Parini, Italy
| | - Maurizio Petrarca
- Neurorehabilitation Unit, Bambino Gesù Children’s Hospital, 00165 Rome, Italy
| | | | - Andrea Santamato
- Unit of Spasticity and Movement Disorders, Division of Physical Medicine and Rehabilitation, University Hospital of Foggia, 71100 Foggia, Italy
| | - Lorenza Scotti
- Department of Translational Medicine, Università del Piemonte Orientale “Amedeo Avogadro”, 28100 Novara, Italy
| | - Michele Senatore
- Italian Association of Occupational Therapists (AITO), 00136 Rome, Italy
| | - Stefania Spina
- Unit of Spasticity and Movement Disorders, Division of Physical Medicine and Rehabilitation, University Hospital of Foggia, 71100 Foggia, Italy
| | - Elisa Taglione
- Rehabilitation Unit, Istituto Nazionale Assicurazione Infortuni sul Lavoro (INAIL), 56048 Volterra, Italy
| | | | - Valentina Varalta
- Unit of Neurorehabilitation, Department of Neuroscience, Biomedicine, and Movement Sciences, University Hospital of Verona, University of Verona, 37126 Verona, Italy
| | - Alessandro Picelli
- Unit of Neurorehabilitation, Department of Neuroscience, Biomedicine, and Movement Sciences, University Hospital of Verona, University of Verona, 37126 Verona, Italy
| | - Alessio Baricich
- Department of Health Sciences, Università del Piemonte Orientale “Amedeo Avogadro”, 28100 Novara, Italy
- Physical Medicine and Rehabilitation Unit, AOU Maggiore della Carità University Hospital, 28100 Novara, Italy
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Johansen T, Sørensen L, Kolskår KK, Strøm V, Wouda MF. Effectiveness of robot-assisted arm exercise on arm and hand function in stroke survivors - A systematic review and meta-analysis. J Rehabil Assist Technol Eng 2023; 10:20556683231183639. [PMID: 37426037 PMCID: PMC10327418 DOI: 10.1177/20556683231183639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 06/06/2023] [Indexed: 07/11/2023] Open
Abstract
Objective: To examine the treatment effect of commercially available robotic-assisted devices, compared to traditional occupational- and physiotherapy on arm and hand function in persons with stroke. Methods: A systematic literature search was conducted in Medline, EMBASE, CINAHL and Cochrane Central Register of Controlled Trials up to January 2022. Randomized controlled trials (RCT's) involving persons with stroke of all ages and robot-assisted exercise as method for arm and hand function, compared to traditional therapy methods were included. Three authors performed the selection independently. The quality of evidence across studies was assessed using GRADE. Results: Eighteen RCT's were included in the study. A random effects meta-analysis showed a statistically significantly higher treatment effect in the robotic-assisted exercise group (p=<0.0001) compared to the traditional treatment group, with a total effect size of 0.44 (CI = 0.22-0.65). Heterogeneity was high, measured with I2 of 65%). Subgroup analyses showed no significant effects of the type of robotic device, treatment frequency or duration of intervention. Discussion and conclusion: Even though the analysis showed significant improvement in arm and hand function in favor of the robotic-assisted exercise group, the results in this systematic review should be interpreted with caution. This is due to high heterogeneity among the studies included and the presence of possible publication bias. Results of this study highlight the need for larger and more methodological robust RCT's, with a focus on reporting training intensity during robotic exercise.
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Affiliation(s)
- Truls Johansen
- Department of Research, Sunnaas Rehabilitation Hospital, Oslo, Norway
| | - Linda Sørensen
- Department of Research, Sunnaas Rehabilitation Hospital, Oslo, Norway
- Department of Innovation, Sunnaas Rehabilitation Hospital, Oslo, Norway
| | - Knut K Kolskår
- Department of Research, Sunnaas Rehabilitation Hospital, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
| | - Vegard Strøm
- Department of Research, Sunnaas Rehabilitation Hospital, Oslo, Norway
| | - Matthijs F Wouda
- Department of Research, Sunnaas Rehabilitation Hospital, Oslo, Norway
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Wei T, Ge X, Lu L, Li J, Xu P, Wu Q. Efficacy and safety of vagus nerve stimulation on upper extremity motor function in patients with stroke: A meta-analysis of randomized controlled trials. NeuroRehabilitation 2023; 53:253-267. [PMID: 37694313 DOI: 10.3233/nre-230106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
BACKGROUND In 2021, the U.S. Food and Drug Administration (FDA) approved paired vagus nerve stimulation (VNS) for patients with moderate-to-severe upper extremity motor impairments following chronic ischemic stroke. OBJECTIVE Previous meta-analyses have shown that VNS may impact stroke rehabilitation, but each has some limitations. METHODS PubMed, Ovid, Cochrane Library, ScienceDirect, Web of Science and WHO ICTRP databases were searched until July 14, 2022 for randomized controlled trials (RCTs). We defined primary outcomes as Fugl-Meyer Assessment for Upper Extremity (FMA-UE) and Wolf Motor Function Test (WMFT). Subgroup analyses included types of VNS, time since onset and long-term effects. Secondary outcomes included adverse events of VNS. RESULTS Eight RCTs involving 266 patients were analyzed, of which five used direct VNS and three transcutaneous auricular VNS. The results revealed that VNS enhanced upper extremity function via FMA-UE (SMD = 0.73; 95% CI: 0.48 to 0.99; P < 0.00001) and WMFT (SMD = 0.82; 95% CI:0.52 to 1.13; P < 0.00001) in comparison to the control group, but showed no significant change on long-term effects of FMA-UE (SMD = 0.69; 95% CI: - 0.06 to 1.44; P = 0.07). There was no difference in adverse events between the VNS and control groups (RR = 1.16; 95% CI: 0.46 to 2.92; P = 0.74). CONCLUSION For stroke victims with upper limb disabilities, VNS paired with rehabilitation was significantly safe and effective. More high-quality multicentric RCTs are needed to validate this conclusion.
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Affiliation(s)
- Tianqi Wei
- Department of Rehabilitation Medicine, The Affiliated Suzhou Hospital of Nanjing University Medical School, Jiangsu, China
| | - Xiangyang Ge
- Department of Rehabilitation Medicine, Affiliated Maternity and Child Health Care Hospital of Nantong University, Jiangsu, China
| | - Lingfeng Lu
- Department of Orthopedics, The Affiliated Suzhou Hospital of Nanjing Medical University, Jiangsu, China
| | - Jing Li
- Department of Neurology, The Affiliated Suzhou Hospital of Nanjing University Medical School, Jiangsu, China
| | - Panpan Xu
- Department of Rehabilitation Medicine, The Affiliated Suzhou Hospital of Nanjing University Medical School, Jiangsu, China
| | - Qinfeng Wu
- Department of Rehabilitation Medicine, The Affiliated Suzhou Hospital of Nanjing University Medical School, Jiangsu, China
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Shen QR, Hu MT, Feng W, Li KP, Wang W. Narrative Review of Noninvasive Brain Stimulation in Stroke Rehabilitation. Med Sci Monit 2022; 28:e938298. [PMID: 36457205 PMCID: PMC9724451 DOI: 10.12659/msm.938298] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 11/03/2022] [Indexed: 09/02/2023] Open
Abstract
Stroke is a disease with a high incidence and disability rate, resulting in changes in neural network and corticoid-subcortical excitability and various functional disabilities. The aim of the present study was to discuss the current status of research and limitations and potential direction in the application of noninvasive brain stimulation (NIBS) on post-stroke patients. This literature review focused on clinical studies and reviews. Literature retrieval was conducted in PubMed, Cochrane, Scopus, and CNKI, using the following keywords: Repeated transcranial magnetic stimulation, Transcranial direct current stimulation, Transcranial alternating current stimulation, Transcranial alternating current stimulation, Transcranial focused ultrasound, Noninvasive vagus nerve stimulation, Stroke, and Rehabilitation. We selected 200 relevant publications from 1985 to 2022. An overview of recent research on the use of NIBS on post-stroke patients, including its mechanism, therapeutic parameters, effects, and safety, is presented. It was found that NIBS has positive therapeutic effects on dysfunctions of motor, sensory, cognitive, speech, swallowing, and depression after stroke, but standardized stimulus programs are still lacking. The literature suggests that rTMS and tDCS are more beneficial to post-stroke patients, while tFUS and tVNS are currently less studied for post-stroke rehabilitation, but are also potential interventions.
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Affiliation(s)
- Qian-ru Shen
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, PR China
| | - Meng-ting Hu
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, PR China
| | - Wei Feng
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, PR China
| | - Kun-Peng Li
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, PR China
| | - Wu Wang
- Department of Rehabilitation Therapy, The Second Rehabilitation Hospital of Shanghai, Shanghai, PR China
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Cheng K, Wang Z, Bai J, Xiong J, Chen J, Ni J. Research advances in the application of vagus nerve electrical stimulation in ischemic stroke. Front Neurosci 2022; 16:1043446. [PMID: 36389255 PMCID: PMC9650138 DOI: 10.3389/fnins.2022.1043446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 10/10/2022] [Indexed: 12/04/2022] Open
Abstract
Stroke seriously endangers human well-being and brings a severe burden to family and society. Different post-stroke dysfunctions result in an impaired ability to perform activities of daily living. Standard rehabilitative therapies may not meet the requirements for functional improvement after a stroke; thus, alternative approaches need to be proposed. Currently, vagus nerve stimulation (VNS) is clinically applied for the treatment of epilepsy, depression, cluster headache and migraine, while its treatment of various dysfunctions after an ischemic stroke is still in the clinical research stage. Recent studies have confirmed that VNS has neuroprotective effects in animal models of transient and permanent focal cerebral ischemia, and that its combination with rehabilitative training significantly improves upper limb motor dysfunction and dysphagia. In addition, vagus-related anatomical structures and neurotransmitters are closely implicated in memory–cognition enhancement processes, suggesting that VNS is promising as a potential treatment for cognitive dysfunction after an ischemic stroke. In this review, we outline the current status of the application of VNS (invasive and non-invasive) in diverse functional impairments after an ischemic stroke, followed by an in-depth discussion of the underlying mechanisms of its mediated neuroprotective effects. Finally, we summarize the current clinical implementation challenges and adverse events of VNS and put forward some suggestions for its future research direction. Research on VNS for ischemic stroke has reached a critical stage. Determining how to achieve the clinical transformation of this technology safely and effectively is important, and more animal and clinical studies are needed to clarify its therapeutic mechanism.
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Li ZD, Qiu HJ, Wang XQ, Zhang CC, Zhang YJ. Transcutaneous auricular vagus nerve stimulation in poststroke cognitive impairment: protocol for a randomised controlled trial. BMJ Open 2022; 12:e063803. [PMID: 36198457 PMCID: PMC9535199 DOI: 10.1136/bmjopen-2022-063803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND As one of the most common stroke sequelae, poststroke cognitive impairment significantly impacts 17.6%-83% of survivors, affecting their rehabilitation, daily living and quality of life. Improving cognitive abilities among patients in stroke recovery is therefore critical and urgent. Transcutaneous auricular vagus nerve stimulation (TAVNS) is a non-invasive, safe, cost-effective treatment with great potential for improving the cognitive function of poststroke patients. This clinical research will evaluate the effectiveness, and help elucidate the possible underlying mechanisms, of TAVNS for improving poststroke cognitive function. METHODS AND ANALYSIS A single-centre, parallel-group, allocation concealment, assessor-blinded randomised controlled clinical trial. We will allocate 88 recruited participants to the TAVNS or sham group for an intervention that will run for 8 weeks, 5 days per week with twice daily sessions lasting 30 min each. Blood tests will be performed and questionnaires issued at baseline and 8-week and 12 week follow-ups. Primary outcomes will be changes in cognitive function scores. Secondary outcomes will be changes in activities of daily living, quality of life and serum oxidative stress indicators. ETHICS AND DISSEMINATION The Ethics Committee of the First Affiliated Hospital of Hunan University of Chinese Medicine has approved the protocol (No. HN-LL-YJSLW-2022200). Findings will be published in peer-reviewed academic journals and presented at scientific conferences. TRIAL REGISTRATION NUMBER ChiCTR2200057808.
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Affiliation(s)
- Zhen-Dong Li
- Department of Nursing, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Hang-Jian Qiu
- School of Nursing, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Xiao-Qian Wang
- School of Nursing, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Cheng-Cheng Zhang
- Department of Nursing, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Yue-Juan Zhang
- Department of Nursing, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
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Li JN, Xie CC, Li CQ, Zhang GF, Tang H, Jin CN, Ma JX, Wen L, Zhang KM, Niu LC. Efficacy and safety of transcutaneous auricular vagus nerve stimulation combined with conventional rehabilitation training in acute stroke patients: a randomized controlled trial conducted for 1 year involving 60 patients. Neural Regen Res 2022; 17:1809-1813. [PMID: 35017442 PMCID: PMC8820701 DOI: 10.4103/1673-5374.332155] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 09/11/2021] [Accepted: 10/23/2021] [Indexed: 02/05/2023] Open
Abstract
Transcutaneous auricular vagus nerve stimulation (ta-VNS) is a novel noninvasive treat-ment for stroke that directly stimulates the peripheral auricular branch of the vagus nerve. There have been recent reports that ta-VNS combined with conventional rehabilitation training promotes the recovery of neurological function of patients with acute stroke. However, these were small-sample-sized studies on the recovery of neurological function in patients after percutaneous vagus nerve stimulation in the subacute and chronic phases after stroke. This double-blinded randomized controlled trial involved 60 acute ischemic or hemorrhagic stroke patients aged 18-80 years who received treatment in the Second Affiliated Hospital of Chongqing Medical University. The subjects were randomly assigned to receive ta-VNS or sham ta-VNS combined with conventional rehabilitation training. The follow-up results over 1 year revealed that ta-VNS combined with conventional rehabilitation training greatly improved the recovery of motor and sensory functions and emotional responses compared with sham ta-VNS combined with conventional rehabilitation training. There were no obvious side effects. These findings suggest that ta-VNS combined with conventional rehabilitation training for the treatment of acute ischemic or hemorrhagic stroke patients is safe and effective.
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Affiliation(s)
- Jia-Ni Li
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chen-Chen Xie
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chang-Qing Li
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Gui-Fang Zhang
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hao Tang
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chuan-Na Jin
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jing-Xi Ma
- Department of Neurology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
- Chongqing Key Laboratory of Neurodegenerative Diseases, Chongqing, China
| | - Lan Wen
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, Sichuan Province, China
| | - Ke-Ming Zhang
- Clinical College, Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Ling-Chuan Niu
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Ramos-Castaneda JA, Barreto-Cortes CF, Losada-Floriano D, Sanabria-Barrera SM, Silva-Sieger FA, Garcia RG. Efficacy and Safety of Vagus Nerve Stimulation on Upper Limb Motor Recovery After Stroke. A Systematic Review and Meta-Analysis. Front Neurol 2022; 13:889953. [PMID: 35847207 PMCID: PMC9283777 DOI: 10.3389/fneur.2022.889953] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 06/13/2022] [Indexed: 12/28/2022] Open
Abstract
Background Upper limb motor impairment is one of the main complications of stroke, affecting quality of life both for the patient and their family. The aim of this systematic review was to summarize the scientific evidence on the safety and efficacy of Vagus Nerve Stimulation (VNS) on upper limb motor recovery after stroke. Methods A systematic review and meta-analysis of studies that have evaluated the efficacy or safety of VNS in stroke patients was performed. The primary outcome was upper limb motor recovery. A search of articles published on MEDLINE, CENTRAL, EBSCO and LILACS up to December 2021 was performed, and a meta-analysis was developed to calculate the overall effects. Results Eight studies evaluating VNS effects on motor function in stroke patients were included, of which 4 used implanted and 4 transcutaneous VNS. It was demonstrated that VNS, together with physical rehabilitation, increased upper limb motor function on average 7.06 points (95%CI 4.96; 9.16) as assessed by the Fugl-Meyer scale. Likewise, this improvement was significantly greater when compared to a control intervention (mean difference 2.48, 95%CI 0.98; 3.98). No deaths or serious adverse events related to the intervention were reported. The most frequent adverse events were dysphonia, dysphagia, nausea, skin redness, dysgeusia and pain related to device implantation. Conclusion VNS, together with physical rehabilitation, improves upper limb motor function in stroke patients. Additionally, VNS is a safe intervention.
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Affiliation(s)
- Jorge A. Ramos-Castaneda
- Fundación Cardiovascular de Colombia, Bucaramanga, Colombia
- Research Group Innovación y Cuidado, Faculty of Nursing, Universidad Antonio Nariño, Neiva, Colombia
- *Correspondence: Jorge A. Ramos-Castaneda
| | | | | | | | | | - Ronald G. Garcia
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- School of Medicine, Universidad de Santander, Bucaramanga, Colombia
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Vagus Nerve Stimulation for Stroke Motor Recovery-What Is Next? Transl Stroke Res 2022:10.1007/s12975-022-01041-4. [PMID: 35653016 DOI: 10.1007/s12975-022-01041-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 05/24/2022] [Indexed: 10/18/2022]
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Liu Y, Zhang L, Zhang X, Ma J, Jia G. Effect of Combined Vagus Nerve Stimulation on Recovery of Upper Extremity Function in Patients with Stroke: A Systematic Review and Meta-Analysis. J Stroke Cerebrovasc Dis 2022; 31:106390. [DOI: 10.1016/j.jstrokecerebrovasdis.2022.106390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 10/18/2022] Open
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Zhao K, Yang J, Huang J, Zhao Z, Qu Y. Effect of vagus nerve stimulation paired with rehabilitation for upper limb function improvement after stroke: a systematic review and meta-analysis of randomized controlled trials. Int J Rehabil Res 2022; 45:99-108. [PMID: 34839304 PMCID: PMC9071025 DOI: 10.1097/mrr.0000000000000509] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/30/2021] [Indexed: 02/05/2023]
Abstract
Vagus nerve stimulation (VNS) could potentially facilitate arm function recovery after stroke. The aim of this review was to evaluate the effect of VNS paired with rehabilitation on upper limb function recovery after stroke. We considered randomized controlled trials (RCTs) that used VNS paired with rehabilitation for the improvement of upper limb function after stroke and were published in English. Eligible RCTs were identified by searching electronic databases, including MEDLINE, Web of Science, Embase, CENTRAL and PEDro, from their inception until June 2021. Quality of included studies was assessed using PEDro score and Cochrane's risk of bias assessment. A meta-analysis was performed on the collected data. Five studies with a total of 178 participants met the inclusion criteria. Overall, the present meta-analysis revealed a significant effect of VNS on Fugl-Meyer Assessment for Upper Extremity (FMA-UE, MD = 3.59; 95% CI, 2.55-4.63; P < 0.01) when compared with the control group. However, no significant difference was observed in adverse events associated with device implantation between the invasive VNS and control groups (RR = 1.10; 95% CI, 0.92-1.32; P = 0.29). No adverse events associated with device use were reported in invasive VNS, and one was reported in transcutaneous VNS. This study revealed that VNS paired with rehabilitation can facilitate the recovery of upper limb function in patients with stroke on the basis of FMA-UE scores, but the long-term effects remain to be demonstrated.
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Affiliation(s)
- Kehong Zhao
- School of Rehabilitation Sciences, West China School of Medicine
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Chengdu, Sichuan, PR China
| | - Jiaen Yang
- School of Rehabilitation Sciences, West China School of Medicine
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Chengdu, Sichuan, PR China
| | - Jiapeng Huang
- School of Rehabilitation Sciences, West China School of Medicine
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Chengdu, Sichuan, PR China
| | - Ziqi Zhao
- School of Rehabilitation Sciences, West China School of Medicine
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Chengdu, Sichuan, PR China
| | - Yun Qu
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Chengdu, Sichuan, PR China
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Dawson J, Abdul-Rahim AH. Paired vagus nerve stimulation for treatment of upper extremity impairment after stroke. Int J Stroke 2022; 17:1061-1066. [PMID: 35377261 DOI: 10.1177/17474930221094684] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The use of a paired vagus nerve stimulation (VNS) system for the treatment of moderate to severe upper extremity motor deficits associated with chronic ischaemic stroke has recently been approved by the U.S Food and Drug Administration. This treatment aims to increase task specific neuroplasticity through activation of cholinergic and noradrenergic networks during rehabilitation therapy. A recent pivotal phase III trial showed that VNS paired with rehabilitation led to improvements in upper extremity impairment and function in people with moderate to severe arm weakness an average of three years after ischaemic stroke. The between group difference following six weeks of in-clinic therapy and 90 days of home exercise therapy was three points on the upper extremity Fugl Meyer score. A clinically meaningful response defined as a greater than or equal to six point improvement was seen in approximately half of people treated with VNS compared to approximately a quarter of people treated with rehabilitation alone. Further post-marketing research should aim to establish whether the treatment is also of use for people with intracerebral haemorrhage, in people with more severe arm weakness, and for other post stroke impairments. In addition, high quality randomised studies of non-invasive VNS are required.
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Affiliation(s)
- Jesse Dawson
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 9QQ, UK 236381
| | - Azmil Husin Abdul-Rahim
- Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 9QQ, UK 3526
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Wang Y, Li L, Li S, Fang J, Zhang J, Wang J, Zhang Z, Wang Y, He J, Zhang Y, Rong P. Toward Diverse or Standardized: A Systematic Review Identifying Transcutaneous Stimulation of Auricular Branch of the Vagus Nerve in Nomenclature. Neuromodulation 2022; 25:366-379. [PMID: 35396069 DOI: 10.1111/ner.13346] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/19/2020] [Accepted: 11/23/2020] [Indexed: 12/26/2022]
Abstract
OBJECTIVES After 20 years of development, there is confusion in the nomenclature of transcutaneous stimulation of the auricular branch of the vagus nerve (ABVN). We performed a systematic review of transcutaneous stimulation of ABVN in nomenclature. MATERIALS AND METHODS A systematic search of the literature was carried out, using the bibliographic search engine PubMed. The search covered articles published up until June 11, 2020. We recorded the full nomenclature and abbreviated nomenclature same or similar to transcutaneous stimulation of ABVN in the selected eligible studies, as well as the time and author information of this nomenclature. RESULTS From 261 studies, 67 full nomenclatures and 27 abbreviated nomenclatures were finally screened out, transcutaneous vagus nerve stimulation and tVNS are the most common nomenclature, accounting for 38.38% and 42.06%, respectively. In a total of 97 combinations of full nomenclatures and abbreviations, the most commonly used nomenclature for the combination of transcutaneous vagus nerve stimulation and tVNS, accounting for 30.28%. Interestingly, the combination of full nomenclatures and abbreviations is not always a one-to-one relationship, there are ten abbreviated nomenclatures corresponding to transcutaneous vagus nerve stimulation, and five full nomenclatures corresponding to tVNS. In addition, based on the analysis of the usage habits of nomenclature in 21 teams, it is found that only three teams have fixed habits, while other different teams or the same team do not always use the same nomenclature in their paper. CONCLUSIONS The phenomenon of confusion in the nomenclature of transcutaneous stimulation of ABVN is obvious and shows a trend of diversity. The nomenclature of transcutaneous stimulation of ABVN needs to become more standardized in the future.
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Affiliation(s)
- Yu Wang
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Liang Li
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Shaoyuan Li
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jiliang Fang
- Department of Radiology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jinling Zhang
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Junying Wang
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Zixuan Zhang
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Yifei Wang
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jiakai He
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Yue Zhang
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Peijing Rong
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China.
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Turnbull C, Boomsma A, Milte R, Stanton TR, Hordacre B. Safety and Adverse Events following Non-invasive Electrical Brain Stimulation in Stroke: A Systematic Review. Top Stroke Rehabil 2022; 30:355-367. [PMID: 35353649 DOI: 10.1080/10749357.2022.2058294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Noninvasive electrical stimulation (ES) could have therapeutic potential in stroke recovery. However, there is no comprehensive evaluation of adverse events. This study systematically searched the literature to document frequency and prevalence of adverse events. A secondary aim was to explore associations between adverse events and ES parameters or participant characteristics.Methods: Databases were searched for studies evaluating ES in adults with stroke. All included studies were required to report on adverse events. Extracted data were: (1) study design; (2) adverse events; (3) participant characteristics; (4) ES parameters. RESULTS Seventy-five studies were included. Adverse events were minor in nature. The most frequently reported adverse events were tingling (37.3% of papers), burning (18.7%), headaches (14.7%) and fatigue (14.7%). Cathodal stimulation was associated with greater frequency of itching (p = .02), intensities of 1-2 mA with increased tingling (p = .04) and discomfort (p = .03), and current density <0.4mA/cm2 with greater discomfort (p = .03). Tingling was the most prevalent adverse event (18.1% of participants), with prevalence data not differing between active and control conditions (all p ≥ 0.37). Individual participants were more likely to report adverse events with increasing current density (r = 0.99, p = .001). Two severe adverse events were noted (a seizure and percutaneous endoscopic gastrostomy placement). CONCLUSION ES appears safe in people with stroke as reported adverse events were predominantly minor in nature. An adverse events questionnaire is proposed to enable a more comprehensive and nuanced analysis of the frequency and prevalence of adverse events.
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Affiliation(s)
- Clare Turnbull
- Innovation, IMPlementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, SA, Australia
| | - Aafke Boomsma
- Innovation, IMPlementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, SA, Australia
| | - Rachel Milte
- Health and Social Care Economics Group College of Nursing and Health Sciences, Flinders University, Adelaide, SA, Australia
| | - Tasha R Stanton
- Innovation, IMPlementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, SA, Australia
| | - Brenton Hordacre
- Innovation, IMPlementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, University of South Australia, Adelaide, SA, Australia
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Ahmed I, Yeldan I, Mustafaoglu R. The Adjunct of Electric Neurostimulation to Rehabilitation Approaches in Upper Limb Stroke Rehabilitation: A Systematic Review With Network Meta-Analysis of Randomized Controlled Trials. Neuromodulation 2022; 25:1197-1214. [PMID: 35216873 DOI: 10.1016/j.neurom.2022.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 12/11/2021] [Accepted: 01/08/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE This review analyzed the current evidence and the potential for the application of electric neurostimulation such as transcranial direct current stimulation (tDCS) and vagus nerve stimulation (VNS) in upper limb stroke rehabilitation. MATERIALS AND METHODS We performed a systematic review of randomized controlled trials (RCTs) using network meta-analysis (NMA), searching the following data bases: PubMed, Web of Science, Cochrane, and Google Scholar, using specific keywords, from January 2010 to April 2021, and assessing the effects of "tDCS" or "VNS" combined with other therapies on upper limb motor function and activities of daily living (ADL) after stroke. RESULTS We included 38 RCTs with 1261 participants. Pairwise NMA showed transcutaneous VNS (tVNS) and anodal tDCS were effective in improving upper limb motor function (tVNS: mean difference [MD]: 5.50; 95% CI [0.67-11.67]; p < 0.05; anodal tDCS: MD: 5.23; 95% CI [2.45-8.01]; p < 0.05). tVNS and tDCS (anodal and cathodal) were also effective in improving ADL performance after stroke (tVNS: standard MD [SMD]: 0.96; 95% CI [0.15-2.06]; p < 0.05; anodal tDCS: SMD: 3.78; 95% CI [0.0-7.56]; p < 0.05; cathodal tDCS: SMD: 5.38; 95% CI [0.22-10.54]; p < 0.05). Surface under the cumulative ranking curve analysis revealed that tVNS is the best ranked treatment in improving upper limb motor function and performance in ADL after stroke. There was no difference in safety between VNS and its control interventions, measured by reported adverse events (VNS: risk ratio = 1.02 [95% CI = 0.48-2.17; I2 = 0; p = 0.96]). CONCLUSION Moderate- to high-quality evidence suggests that tVNS and anodal tDCS were effective in improving upper limb motor function in both acute/subacute and chronic stroke. In addition to tVNS and anodal tDCS, cathodal tDCS is also effective in improving ADL performance after stroke.
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Affiliation(s)
- Ishtiaq Ahmed
- Department of Physiotherapy and Rehabilitation, Institute of Graduate Studies, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ipek Yeldan
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Rustem Mustafaoglu
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Istanbul University-Cerrahpasa, Istanbul, Turkey.
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Li L, Wang D, Pan H, Huang L, Sun X, He C, Wei Q. Non-invasive Vagus Nerve Stimulation in Cerebral Stroke: Current Status and Future Perspectives. Front Neurosci 2022; 16:820665. [PMID: 35250458 PMCID: PMC8888683 DOI: 10.3389/fnins.2022.820665] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 01/25/2022] [Indexed: 12/26/2022] Open
Abstract
Stroke poses a serious threat to human health and burdens both society and the healthcare system. Standard rehabilitative therapies may not be effective in improving functions after stroke, so alternative strategies are needed. The FDA has approved vagus nerve stimulation (VNS) for the treatment of epilepsy, migraines, and depression. Recent studies have demonstrated that VNS can facilitate the benefits of rehabilitation interventions. VNS coupled with upper limb rehabilitation enhances the recovery of upper limb function in patients with chronic stroke. However, its invasive nature limits its clinical application. Researchers have developed a non-invasive method to stimulate the vagus nerve (non-invasive vagus nerve stimulation, nVNS). It has been suggested that nVNS coupled with rehabilitation could be a promising alternative for improving muscle function in chronic stroke patients. In this article, we review the current researches in preclinical and clinical studies as well as the potential applications of nVNS in stroke. We summarize the parameters, advantages, potential mechanisms, and adverse effects of current nVNS applications, as well as the future challenges and directions for nVNS in cerebral stroke treatment. These studies indicate that nVNS has promising efficacy in reducing stroke volume and attenuating neurological deficits in ischemic stroke models. While more basic and clinical research is required to fully understand its mechanisms of efficacy, especially Phase III trials with a large number of patients, these data suggest that nVNS can be applied easily not only as a possible secondary prophylactic treatment in chronic cerebral stroke, but also as a promising adjunctive treatment in acute cerebral stroke in the near future.
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Affiliation(s)
- Lijuan Li
- Rehabilitation Medicine Center and Institute of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Sichuan University, Chengdu, China
| | - Dong Wang
- Department of Rehabilitation Medicine, Affiliated Hospital of Chengdu University, Chengdu, China
| | - Hongxia Pan
- Rehabilitation Medicine Center and Institute of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Sichuan University, Chengdu, China
| | - Liyi Huang
- Rehabilitation Medicine Center and Institute of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Sichuan University, Chengdu, China
| | - Xin Sun
- Rehabilitation Medicine Center and Institute of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Sichuan University, Chengdu, China
| | - Chengqi He
- Rehabilitation Medicine Center and Institute of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Sichuan University, Chengdu, China
| | - Quan Wei
- Rehabilitation Medicine Center and Institute of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, Sichuan University, Chengdu, China
- *Correspondence: Quan Wei,
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Motolese F, Capone F, Di Lazzaro V. New tools for shaping plasticity to enhance recovery after stroke. HANDBOOK OF CLINICAL NEUROLOGY 2022; 184:299-315. [PMID: 35034743 DOI: 10.1016/b978-0-12-819410-2.00016-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Stroke is the second most common cause of death worldwide and its prevalence is projected to increase in the coming years in parallel with the increase of life expectancy. Despite the great improvements in the management of the acute phase of stroke, some residual disability persists in most patients thus requiring rehabilitation. One third of patients do not reach the maximal recovery potential and different approaches have been explored with the aim to boost up recovery. In this regard, noninvasive brain stimulation techniques have been widely used to induce neuroplasticity phenomena. Different protocols of repetitive transcranial magnetic stimulation (rTMS) and transcranial electrical stimulation (tES) can induce short- and long-term changes of synaptic excitability and are promising tools for enhancing recovery in stroke patients. New options for neuromodulation are currently under investigation. They include: vagal nerve stimulation (VNS) that can be delivered invasively, with implanted stimulators and noninvasively with transcutaneous VNS (tVNS); and extremely low-frequency (1-300Hz) magnetic fields. This chapter will provide an overview on the new techniques that are used for neuroprotection and for enhancing recovery after stroke.
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Affiliation(s)
- Francesco Motolese
- Neurology, Neurophysiology and Neurobiology Unit, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Fioravante Capone
- Neurology, Neurophysiology and Neurobiology Unit, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Vincenzo Di Lazzaro
- Neurology, Neurophysiology and Neurobiology Unit, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy.
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Badran BW, Austelle CW. The Future Is Noninvasive: A Brief Review of the Evolution and Clinical Utility of Vagus Nerve Stimulation. FOCUS (AMERICAN PSYCHIATRIC PUBLISHING) 2022; 20:3-7. [PMID: 35746934 PMCID: PMC9063597 DOI: 10.1176/appi.focus.20210023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Vagus nerve stimulation (VNS) is a form of neuromodulation that stimulates the vagus nerve. VNS had been suggested as an intervention in the late 1800s and was rediscovered in the late 1980s as a promising treatment for refractory epilepsy. Since then, VNS has been approved by the U.S. Food and Drug Administration (FDA) for treatment of epilepsy, morbid obesity, and treatment-resistant depression. Unfortunately, VNS is underutilized, as it is costly to implant and often only suggested when all other treatment options have been exhausted. Discovery of a noninvasive method of VNS known as transcutaneous auricular VNS (taVNS), which activates the vagus through stimulation of the auricular branch of the vagus nerve, has reignited excitement around VNS. taVNS has immense potential as a safe, at-home, wearable treatment for various neuropsychiatric disorders. Major strides are being made in both invasive and noninvasive VNS that aim to make this technology more accessible to patients who would find benefit, including the ongoing RECOVER trial, a randomized controlled trial in up to 1,000 individuals to further evaluate the efficacy of VNS for treatment-resistant depression. In this brief review, we first discuss the early history of VNS; then its clinical utility in FDA-approved indications; and, finally, noninvasive VNS.
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Affiliation(s)
- Bashar W Badran
- Department of Psychiatry, Medical University of South Carolina, Charleston
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Yan L, Qian Y, Li H. Transcutaneous Vagus Nerve Stimulation Combined with Rehabilitation Training in the Intervention of Upper Limb Movement Disorders After Stroke: A Systematic Review. Neuropsychiatr Dis Treat 2022; 18:2095-2106. [PMID: 36147448 PMCID: PMC9488604 DOI: 10.2147/ndt.s376399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/03/2022] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Stroke often leaves behind a wide range of functional impairments, of which limb movement disorders are more common. Approximately 85% of patients have varying degrees of upper limb motor impairment. In recent years, transcutaneous vagus nerve stimulation combined with rehabilitation training has been gradually used in the rehabilitation of upper limb motor dysfunction after stroke and appears to have some therapeutic benefits. PURPOSE We conducted the systematic review to evaluate the efficacy and safety of transcutaneous vagus nerve stimulation combined with rehabilitation training in the rehabilitation of upper limb motor dysfunction after stroke. METHODS Six databases, including PubMed, Embase, Cochrane Library, China National Knowledge Infrastructure Database (CNKI), Wanfang Database, and China Science and Technology Journal Database (VIP), were searched for January 1, 2016 to January 30, 2022. Randomized controlled trials using TVNS combined with rehabilitation training to intervene in upper limb motor dysfunction after stroke were included, and meta-analysis was performed using Review Manager 5.4.1 software. RESULTS Total of 101 participants from 4 studies were included in this systematic review. These studies were evaluated using the Cochrane Review's Handbook 5.1 evaluation criteria and PEDro scores, and meta-analysis was performed on the collected data. The systematic review shows a significant effect of TVNS combined with rehabilitation training on the Upper Extremity Fugl-Meyer Score (MD=3.58, 95% CI [2.34, 4.82], P<0.00001, I2=0%), Function Independent Measure Score (MD=3.86, 95% CI [0.45, 7.27], P=0.03, I2=0%) and the Wolf Motor Function Test Score (MD=3.58, 95% CI [1.97, 5.18], P<0.0001, I2=0%). CONCLUSION Based on UE-FM, FIM, and WMFT scores, TVNS combined with rehabilitation training showed some improvement in upper limb motor dysfunction in post-stroke patients, but its long-term effects, stimulation sites, stimulation parameters, combined mode with rehabilitation training, and adverse effects still need further observation. REGISTRATION PROSPERO: CRD42022312453 (https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42022312453).
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Affiliation(s)
- Long Yan
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, 300380, People's Republic of China.,National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, 300380, People's Republic of China
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- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, 300380, People's Republic of China
| | - Hong Li
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, 300380, People's Republic of China.,National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, 300380, People's Republic of China
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