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Sheng Zheng Z, Xing-Long Wang K, Millan H, Lee S, Howard M, Rothbart A, Rosario E, Schnakers C. Transcranial direct stimulation over left inferior frontal gyrus improves language production and comprehension in post-stroke aphasia: A double-blind randomized controlled study. BRAIN AND LANGUAGE 2024; 257:105459. [PMID: 39241469 DOI: 10.1016/j.bandl.2024.105459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 04/26/2024] [Accepted: 08/21/2024] [Indexed: 09/09/2024]
Abstract
Transcranial direct current stimulation (tDCS) targeting Broca's area has shown promise for augmenting language production in post-stroke aphasia (PSA). However, previous research has been limited by small sample sizes and inconsistent outcomes. This study employed a double-blind, parallel, randomized, controlled design to evaluate the efficacy of anodal Broca's tDCS, paired with 20-minute speech and language therapy (SLT) focused primarily on expressive language, across 5 daily sessions in 45 chronic PSA patients. Utilizing the Western Aphasia Battery-Revised, which assesses a spectrum of linguistic abilities, we measured changes in both expressive and receptive language skills before and after intervention. The tDCS group demonstrated significant improvements over sham in aphasia quotient, auditory verbal comprehension, and spontaneous speech. Notably, tDCS improved both expressive and receptive domains, whereas sham only benefited expression. These results underscore the broader linguistic benefits of Broca's area stimulation and support the integration of tDCS with SLT to advance aphasia rehabilitation.
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Affiliation(s)
- Zhong Sheng Zheng
- Research Institute, Casa Colina Hospital and Centers for Healthcare, Pomona, CA, USA.
| | | | - Henry Millan
- Research Institute, Casa Colina Hospital and Centers for Healthcare, Pomona, CA, USA
| | - Sharon Lee
- Research Institute, Casa Colina Hospital and Centers for Healthcare, Pomona, CA, USA
| | - Melissa Howard
- Research Institute, Casa Colina Hospital and Centers for Healthcare, Pomona, CA, USA
| | - Aaron Rothbart
- Research Institute, Casa Colina Hospital and Centers for Healthcare, Pomona, CA, USA
| | - Emily Rosario
- Research Institute, Casa Colina Hospital and Centers for Healthcare, Pomona, CA, USA
| | - Caroline Schnakers
- Research Institute, Casa Colina Hospital and Centers for Healthcare, Pomona, CA, USA
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Al Qasem W, Abubaker M, Pilátová K, Ježdík P, Kvašňák E. Improving working memory by electrical stimulation and cross-frequency coupling. Mol Brain 2024; 17:72. [PMID: 39354549 PMCID: PMC11446076 DOI: 10.1186/s13041-024-01142-1] [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: 07/27/2024] [Accepted: 09/12/2024] [Indexed: 10/03/2024] Open
Abstract
Working memory (WM) is essential for the temporary storage and processing of information required for complex cognitive tasks and relies on neuronal theta and gamma oscillations. Given the limited capacity of WM, researchers have investigated various methods to improve it, including transcranial alternating current stimulation (tACS), which modulates brain activity at specific frequencies. One particularly promising approach is theta-gamma peak-coupled-tACS (TGCp-tACS), which simulates the natural interaction between theta and gamma oscillations that occurs during cognitive control in the brain. The aim of this study was to improve WM in healthy young adults with TGCp-tACS, focusing on both behavioral and neurophysiological outcomes. Thirty-one participants completed five WM tasks under both sham and verum stimulation conditions. Electroencephalography (EEG) recordings before and after stimulation showed that TGCp-tACS increased power spectral density (PSD) in the high-gamma region at the stimulation site, while PSD decreased in the theta and delta regions throughout the cortex. From a behavioral perspective, although no significant changes were observed in most tasks, there was a significant improvement in accuracy in the 14-item Sternberg task, indicating an improvement in phonological WM. In conclusion, TGCp-tACS has the potential to promote and improve the phonological component of WM. To fully realize the cognitive benefits, further research is needed to refine the stimulation parameters and account for individual differences, such as baseline cognitive status and hormonal factors.
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Affiliation(s)
- Wiam Al Qasem
- Department of Medical Biophysics and Medical Informatics, Third Faculty of Medicine, Charles University in Prague, Prague, Czechia.
| | - Mohammed Abubaker
- Department of Medical Biophysics and Medical Informatics, Third Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Kateřina Pilátová
- Department of Information and Communication Technology in Medicine, Faculty of Biomedical Engineering, Czech Technical University in Prague, Prague, Czechia
| | - Petr Ježdík
- Department of Circuit Theory, Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czechia
| | - Eugen Kvašňák
- Department of Medical Biophysics and Medical Informatics, Third Faculty of Medicine, Charles University in Prague, Prague, Czechia
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Williams EER, Sghirripa S, Rogasch NC, Hordacre B, Attrill S. Non-invasive brain stimulation in the treatment of post-stroke aphasia: a scoping review. Disabil Rehabil 2024; 46:3802-3826. [PMID: 37828899 DOI: 10.1080/09638288.2023.2259299] [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: 03/08/2023] [Revised: 09/06/2023] [Accepted: 09/10/2023] [Indexed: 10/14/2023]
Abstract
PURPOSE Aphasia is an acquired language impairment that commonly results from stroke. Non-invasive brain stimulation (NIBS) might accelerate aphasia recovery trajectories and has seen mounting popularity in recent aphasia rehabilitation research. The present review aimed to: (1) summarise all existing literature on NIBS as a post-stroke aphasia treatment; and (2) provide recommendations for future NIBS-aphasia research. MATERIALS AND METHODS Databases for published and grey literature were searched using scoping review methodology. 278 journal articles, conference abstracts/posters, and books, and 38 items of grey literature, were included for analysis. RESULTS Quantitative analysis revealed that ipsilesional anodal transcranial direct current stimulation and contralesional 1-Hz repetitive transcranial magnetic stimulation were the most widely used forms of NIBS, while qualitative analysis identified four key themes including: the roles of the hemispheres in aphasia recovery and their relationship with NIBS; heterogeneity of individuals but homogeneity of subpopulations; individualisation of stimulation parameters; and much remains under-explored in the NIBS-aphasia literature. CONCLUSIONS Taken together, these results highlighted systemic challenges across the field such as small sample sizes, inter-individual variability, lack of protocol optimisation/standardisation, and inadequate focus on aphasiology. Four key recommendations are outlined herein to guide future research and refine NIBS methods for post-stroke aphasia treatment.
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Affiliation(s)
- Ellen E R Williams
- School of Biomedicine, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, Australia
| | - Sabrina Sghirripa
- School of Biomedicine, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, Australia
| | - Nigel C Rogasch
- School of Biomedicine, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, Australia
- Turner Institute of Brain and Mental Health, School of Psychological Sciences, Monash University, Melbourne, Australia
| | - Brenton Hordacre
- Innovation, IMPlementation and Clinical Translation (IIMPACT) in Health, Allied Health and Human Performance, The University of South Australia, Adelaide, Australia
| | - Stacie Attrill
- Speech Pathology, School of Allied Health Science and Practice, The University of Adelaide, Adelaide, Australia
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Sloane KL, Hamilton RH. Transcranial Direct Current Stimulation to Ameliorate Post-Stroke Cognitive Impairment. Brain Sci 2024; 14:614. [PMID: 38928614 PMCID: PMC11202055 DOI: 10.3390/brainsci14060614] [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: 04/22/2024] [Revised: 06/04/2024] [Accepted: 06/12/2024] [Indexed: 06/28/2024] Open
Abstract
Post-stroke cognitive impairment is a common and disabling condition with few effective therapeutic options. After stroke, neural reorganization and other neuroplastic processes occur in response to ischemic injury, which can result in clinical improvement through spontaneous recovery. Neuromodulation through transcranial direct current stimulation (tDCS) is a promising intervention to augment underlying neuroplasticity in order to improve cognitive function. This form of neuromodulation leverages mechanisms of neuroplasticity post-stroke to optimize neural reorganization and improve function. In this review, we summarize the current state of cognitive neurorehabilitation post-stroke, the practical features of tDCS, its uses in stroke-related cognitive impairment across cognitive domains, and special considerations for the use of tDCS in the post-stroke patient population.
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Affiliation(s)
- Kelly L. Sloane
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Physical Medicine and Rehabilitation, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Roy H. Hamilton
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Physical Medicine and Rehabilitation, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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Contrada M, Scarfone F, Iozzi A, Carozzo S, Vatrano M, Nicoletta MG, Nudo G, Quintieri M, Tonin P, Cerasa A. Combining computer-based rehabilitative approach with tDCS for recovering of aphasia: Implications from a single case study. Clin Case Rep 2024; 12:e8928. [PMID: 38799514 PMCID: PMC11111603 DOI: 10.1002/ccr3.8928] [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: 01/24/2024] [Revised: 04/30/2024] [Accepted: 05/03/2024] [Indexed: 05/29/2024] Open
Abstract
We present a case of a single left hemisphere temporal-parietal stroke with subacute global aphasia and severe verbal apraxia and moderate dysphagia. The patient underwent a combined transcranial direct current stimulation (tDCS) over the left dorsolateral prefrontal cortex (DLPFC) and language stimulation with Virtual Reality Rehabilitation System (VRRS). Patient was treated in a 1-h session, for 5 days a week, for 4 consecutive weeks. After treatment, evident improvements in the comprehension of oral and written language, swallowing abilities, and caregiver burden were detected. Power spectrum analysis of EEG data revealed significant enhancements of θ, α, and β waves from baseline to follow-up. These preliminary results seem to confirm the reliability of the tDCS translational application in conjunction with computer-based cognitive treatment for language disorders in a patient with stroke-induced aphasia.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Antonio Cerasa
- S. Anna InstituteCrotoneItaly
- Institute for Biomedical Research and Innovation (IRIB)National Research Council of Italy (CNR)MessinaItaly
- Department of Pharmacy, Pharmacotechnology Documentation and Transfer Unit, Preclinical and Translational Pharmacology, Health Science and NutritionUniversity of CalabriaRendeItaly
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Chiang H, Mudar RA, Dugas CS, Motes MA, Kraut MA, Hart J. A modified neural circuit framework for semantic memory retrieval with implications for circuit modulation to treat verbal retrieval deficits. Brain Behav 2024; 14:e3490. [PMID: 38680077 PMCID: PMC11056716 DOI: 10.1002/brb3.3490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 01/23/2024] [Accepted: 04/03/2024] [Indexed: 05/01/2024] Open
Abstract
Word finding difficulty is a frequent complaint in older age and disease states, but treatment options are lacking for such verbal retrieval deficits. Better understanding of the neurophysiological and neuroanatomical basis of verbal retrieval function may inform effective interventions. In this article, we review the current evidence of a neural retrieval circuit central to verbal production, including words and semantic memory, that involves the pre-supplementary motor area (pre-SMA), striatum (particularly caudate nucleus), and thalamus. We aim to offer a modified neural circuit framework expanded upon a memory retrieval model proposed in 2013 by Hart et al., as evidence from electrophysiological, functional brain imaging, and noninvasive electrical brain stimulation studies have provided additional pieces of information that converge on a shared neural circuit for retrieval of memory and words. We propose that both the left inferior frontal gyrus and fronto-polar regions should be included in the expanded circuit. All these regions have their respective functional roles during verbal retrieval, such as selection and inhibition during search, initiation and termination of search, maintenance of co-activation across cortical regions, as well as final activation of the retrieved information. We will also highlight the structural connectivity from and to the pre-SMA (e.g., frontal aslant tract and fronto-striatal tract) that facilitates communication between the regions within this circuit. Finally, we will discuss how this circuit and its correlated activity may be affected by disease states and how this circuit may serve as a novel target engagement for neuromodulatory treatment of verbal retrieval deficits.
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Affiliation(s)
- Hsueh‐Sheng Chiang
- Department of NeurologyUniversity of Texas Southwestern Medical CenterDallasTexasUSA
- School of Behavioral and Brain SciencesThe University of Texas at DallasRichardsonTexasUSA
| | - Raksha A. Mudar
- Department of Speech and Hearing ScienceUniversity of Illinois Urbana‐ChampaignChampaignIllinoisUSA
| | - Christine S. Dugas
- School of Behavioral and Brain SciencesThe University of Texas at DallasRichardsonTexasUSA
| | - Michael A. Motes
- School of Behavioral and Brain SciencesThe University of Texas at DallasRichardsonTexasUSA
| | - Michael A. Kraut
- Department of Radiology and Radiological ScienceJohns Hopkins UniversityBaltimoreMarylandUSA
| | - John Hart
- Department of NeurologyUniversity of Texas Southwestern Medical CenterDallasTexasUSA
- School of Behavioral and Brain SciencesThe University of Texas at DallasRichardsonTexasUSA
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Capetti B, Conti L, Marzorati C, Grasso R, Ferrucci R, Pravettoni G. The Application of tDCS to Treat Pain and Psychocognitive Symptoms in Cancer Patients: A Scoping Review. Neural Plast 2024; 2024:6344925. [PMID: 38645612 PMCID: PMC11032211 DOI: 10.1155/2024/6344925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 03/27/2024] [Accepted: 04/01/2024] [Indexed: 04/23/2024] Open
Abstract
Background The use of transcranial direct current stimulation (tDCS) to modulate pain, psychological aspects, and cognitive functions has increased in recent years. The present scoping review aims to investigate the use of tDCS in cancer patients and its significant impact on psychocognitive and pain related symptoms. Methods From the earliest available date to June 2023, a comprehensive search was conducted in three electronic scientific databases-PubMed, Scopus, and Embase-and other supplementary sources. Ten relevant studies were identified and included, comprising single case studies, randomized controlled trials, pilot studies, and one retrospective study. PRISMA guidelines for scoping reviews were followed. Results These studies investigated the use of tDCS to improve pain and psychocognitive aspects in patients with various types of cancer, including breast, oral, bladder, lung, pancreatic, head and neck cancer, hepatocellular carcinoma, and meningioma. Overall, the results suggest that tDCS has shown efficacy in relieving pain, reducing anxiety and depression, and improving cognitive function in cancer patients. Conclusion Due to the limited number and high heterogeneity of the existing literature in this field, more investigation and the establishment of standardized protocols would be required to obtain more conclusive evidence.
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Affiliation(s)
- Benedetta Capetti
- Applied Research Division for Cognitive and Psychological Science, European Institute of Oncology IRCCS, Milan, Italy
| | - Lorenzo Conti
- Applied Research Division for Cognitive and Psychological Science, European Institute of Oncology IRCCS, Milan, Italy
| | - Chiara Marzorati
- Applied Research Division for Cognitive and Psychological Science, European Institute of Oncology IRCCS, Milan, Italy
| | - Roberto Grasso
- Applied Research Division for Cognitive and Psychological Science, European Institute of Oncology IRCCS, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - Roberta Ferrucci
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
- I Neurology Clinic, ASST-Santi Paolo e Carlo University Hospital, Milan 20142, Italy
| | - Gabriella Pravettoni
- Applied Research Division for Cognitive and Psychological Science, European Institute of Oncology IRCCS, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
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Raymer AM, Johnson RK. Effectiveness of Transcranial Direct Current Stimulation as an Adjuvant to Aphasia Treatment Following Stroke: Evidence From Systematic Reviews and Meta-Analyses. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2024:1-13. [PMID: 38306506 DOI: 10.1044/2024_ajslp-23-00312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
PURPOSE Transcranial direct current stimulation (tDCS) is a neuromodulation tool to amplify neural excitability and enhance outcomes associated with speech-language therapy (SLT). Stimulation currents to the left and right hemispheres vary in applying anodal (excitatory), cathodal (inhibitory), or bihemispheric signals. Several systematic reviews (SRs) and meta-analyses (MAs) have summarized the large literature examining tDCS for aphasia rehabilitation. The purpose of this project was to appraise the quality of SRs and MAs of tDCS for aphasia and examine the weight of the evidence for language outcomes in individuals with aphasia beyond SLT alone. METHOD We searched four databases for SRs/MAs examining effects of tDCS for poststroke aphasia. We identified 16 reviews, with nine that incorporated MA to quantify results. Two reviewers reliably coded articles for methodological rigor using the AMSTAR 2 (A MeaSurement Tool to Assess Systematic Reviews, Version 2). We then summarized findings of the 16 reviews. RESULTS The AMSTAR 2 appraisal criteria suggest that critical weaknesses were noted among all reviews except those by Elsner et al. (2015, 2019). Reviews summarized three to 48 studies, as some included only randomized crossover trials and others included all trial designs. All SRs and one MA reported improvements following tDCS stimulation for general aphasia abilities and measures of repetition and speech fluency. Five recent MAs reported significant naming improvements following tDCS using all stimulation arrays. No tDCS effects were noted for comprehension measures. CONCLUSIONS As the tDCS literature matured, the conclusions of MAs merged with earlier SRs reporting statistically positive benefits over SLT alone. Most consistent results are reported for naming measures, leaving some to question the clinical significance of tDCS effects for functional measures of aphasia recovery. Although the tDCS literature is expansive, important questions remain before the technique can be confidently recommended for clinical practice.
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Affiliation(s)
- Anastasia M Raymer
- School of Speech-Language Pathology, Old Dominion University, Norfolk, VA
| | - Rachel K Johnson
- School of Speech-Language Pathology, Old Dominion University, Norfolk, VA
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Kim J, Kim HW, Kovar J, Lee YS. Neural consequences of binaural beat stimulation on auditory sentence comprehension: an EEG study. Cereb Cortex 2024; 34:bhad459. [PMID: 38044462 DOI: 10.1093/cercor/bhad459] [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: 07/17/2023] [Revised: 11/05/2023] [Accepted: 11/06/2023] [Indexed: 12/05/2023] Open
Abstract
A growing literature has shown that binaural beat (BB)-generated by dichotic presentation of slightly mismatched pure tones-improves cognition. We recently found that BB stimulation of either beta (18 Hz) or gamma (40 Hz) frequencies enhanced auditory sentence comprehension. Here, we used electroencephalography (EEG) to characterize neural oscillations pertaining to the enhanced linguistic operations following BB stimulation. Sixty healthy young adults were randomly assigned to one of three listening groups: 18-Hz BB, 40-Hz BB, or pure-tone baseline, all embedded in music. After listening to the sound for 10 min (stimulation phase), participants underwent an auditory sentence comprehension task involving spoken sentences that contained either an object or subject relative clause (task phase). During the stimulation phase, 18-Hz BB yielded increased EEG power in a beta frequency range, while 40-Hz BB did not. During the task phase, only the 18-Hz BB resulted in significantly higher accuracy and faster response times compared with the baseline, especially on syntactically more complex object-relative sentences. The behavioral improvement by 18-Hz BB was accompanied by attenuated beta power difference between object- and subject-relative sentences. Altogether, our findings demonstrate beta oscillations as a neural correlate of improved syntactic operation following BB stimulation.
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Affiliation(s)
- Jeahong Kim
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX 75080, United States
- Callier Clinical Research Center, The University of Texas at Dallas, Richardson, TX 75080, United States
| | - Hyun-Woong Kim
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX 75080, United States
- Callier Clinical Research Center, The University of Texas at Dallas, Richardson, TX 75080, United States
- Center for BrainHealth, The University of Texas at Dallas, Dallas, TX 75235, United States
- Department of Psychology, The University of Texas at Dallas, Richardson, TX 75080, United States
| | - Jessica Kovar
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX 75080, United States
- Callier Clinical Research Center, The University of Texas at Dallas, Richardson, TX 75080, United States
| | - Yune Sang Lee
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX 75080, United States
- Callier Clinical Research Center, The University of Texas at Dallas, Richardson, TX 75080, United States
- Center for BrainHealth, The University of Texas at Dallas, Dallas, TX 75235, United States
- Department of Speech, Language, and Hearing, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX 75080, United States
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Rodríguez A, Amaya-Pascasio L, Gutiérrez-Fernández M, García-Pinteño J, Moreno M, Martínez-Sánchez P. Non-invasive brain stimulation for functional recovery in animal models of stroke: A systematic review. Neurosci Biobehav Rev 2024; 156:105485. [PMID: 38042359 DOI: 10.1016/j.neubiorev.2023.105485] [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: 09/26/2023] [Revised: 11/13/2023] [Accepted: 11/27/2023] [Indexed: 12/04/2023]
Abstract
Motor and cognitive dysfunction occur frequently after stroke, severely affecting a patient´s quality of life. Recently, non-invasive brain stimulation (NIBS) has emerged as a promising treatment option for improving stroke recovery. In this context, animal models are needed to improve the therapeutic use of NIBS after stroke. A systematic review was conducted based on the PRISMA statement. Data from 26 studies comprising rodent models of ischemic stroke treated with different NIBS techniques were included. The SYRCLE tool was used to assess study bias. The results suggest that both repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS) improved overall neurological, motor, and cognitive functions and reduced infarct size both in the short- and long-term. For tDCS, it was observed that either ipsilesional inhibition or contralesional stimulation consistently led to functional recovery. Additionally, the application of early tDCS appeared to be more effective than late stimulation, and tDCS may be slightly superior to rTMS. The optimal stimulation protocol and the ideal time window for intervention remain unresolved. Future directions are discussed for improving study quality and increasing their translational potential.
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Affiliation(s)
- Antonio Rodríguez
- Fundación para la Investigación Biosanitaria de Andalucía Oriental (FIBAO), Torrecárdenas University Hospital, Almería, Spain; Stroke Unit, Department of Neurology, Torrecárdenas University Hospital, Almería, Spain
| | - Laura Amaya-Pascasio
- Stroke Unit, Department of Neurology, Torrecárdenas University Hospital, Almería, Spain
| | - María Gutiérrez-Fernández
- Neurological Sciences and Cerebrovascular Research Laboratory, Department of Neurology and Stroke Center, Neurology and Cerebrovascular Disease Group, Neuroscience Area of Hospital La Paz Institute for Health Research - IdiPAZ (La Paz University Hospital, Universidad Autónoma de Madrid), Madrid, Spain
| | - José García-Pinteño
- Fundación para la Investigación Biosanitaria de Andalucía Oriental (FIBAO), Torrecárdenas University Hospital, Almería, Spain; Stroke Unit, Department of Neurology, Torrecárdenas University Hospital, Almería, Spain
| | - Margarita Moreno
- Department of Psychology, Faculty of Health Science, University of Almería, Spain; Health Research Center (CEINSA), University of Almería, Spain.
| | - Patricia Martínez-Sánchez
- Stroke Unit, Department of Neurology, Torrecárdenas University Hospital, Almería, Spain; Health Research Center (CEINSA), University of Almería, Spain; Department of Nursing, Physiotherapy and Medicine, Faculty of Health Science, University of Almería, Spain.
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Picciuca C, Assogna M, Esposito R, D’Acunto A, Ferraresi M, Picazio S, Borghi I, Martino Cinnera A, Bonnì S, Chiurazzi P, Koch G. Transcranial direct current stimulation combined with speech therapy in Fragile X syndrome patients: a pilot study. Front Neurol 2023; 14:1268165. [PMID: 38116107 PMCID: PMC10729003 DOI: 10.3389/fneur.2023.1268165] [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: 07/27/2023] [Accepted: 10/16/2023] [Indexed: 12/21/2023] Open
Abstract
Background Fragile X syndrome (FXS) is the leading cause of genetic intellectual disability. Among the neurobehavioral dysfunctions in FXS individuals, language development and literacy are compromised. Recent evidence hypothesized that the disruption of excitatory glutamatergic and GABAergic inhibitory neurotransmission balance might be responsible for impairment in cognitive function. In this study, we evaluated for the first time, the safety, tolerability, and efficacy of anodal prefrontal transcranial direct current stimulation (tDCS) combined with standard speech therapy to enhance language function in FXS patients. Methods In total, 16 adult FXS patients were enrolled. Participants underwent 45 min of anodic tDCS combined with speech therapy for 5 weeks (3 times per week). Language function was evaluated using the Test for Reception of Grammar-Version 2 (TROG-2) and subtests of the Italian Language Examination (Esame del Linguaggio - II, EDL-II). Right and left dorsolateral prefrontal cortex transcranial magnetic stimulation and concurrent electroencephalography (TMS-EEG) recordings were collected at baseline and after the treatment to evaluate cortical reactivity and connectivity changes. Results After 5 weeks of combined therapy, we observed a significant improvement in the writing (7.5%), reading (20.3%), repetition (13.3%), and TROG-2 (10.2%) tests. Parallelly with clinical change, TMS-EEG results showed a significant difference in TMS-evoked potential amplitude over the left frontal cortex after treatment (-0.73 ± 0.87 μV) compared to baseline (0.18 ± 0.84 μV). Conclusion Our study provides novel evidence that left anodal prefrontal tDCS combined with standard speech therapy could be effective in enhancing language function in FXS patients, mainly by inducing a rebalance of the dysfunctional prefrontal cortical excitability.
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Affiliation(s)
- Chiara Picciuca
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
| | - Martina Assogna
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Romina Esposito
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
| | - Alessia D’Acunto
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
| | - Matteo Ferraresi
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
| | - Silvia Picazio
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
| | - Ilaria Borghi
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
| | - Alex Martino Cinnera
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
- Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Rome, Italy
| | - Sonia Bonnì
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
| | - Pietro Chiurazzi
- Sezione di Medicina genomica, Dipartimento di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Rome, Italy
- UOC Genetica Medica, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy
| | - Giacomo Koch
- Department of Behavioral and Clinical Neurology, Santa Lucia Foundation IRCCS, Rome, Italy
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
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Mathews D, Abernethy A, Butte AJ, Enriquez J, Kocher B, Lisanby SH, Persons TM, Fabi R, Offodile AC, Sherkow JS, Sullenger RD, Freiling E, Balatbat C. Neurotechnology and Noninvasive Neuromodulation: Case Study for Understanding and Anticipating Emerging Science and Technology. NAM Perspect 2023; 2023:202311c. [PMID: 38812840 PMCID: PMC11136498 DOI: 10.31478/202311c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
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13
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Norata D, Motolese F, Magliozzi A, Pilato F, Di Lazzaro V, Luzzi S, Capone F. Transcranial direct current stimulation in semantic variant of primary progressive aphasia: a state-of-the-art review. Front Hum Neurosci 2023; 17:1219737. [PMID: 38021245 PMCID: PMC10663282 DOI: 10.3389/fnhum.2023.1219737] [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: 05/09/2023] [Accepted: 09/27/2023] [Indexed: 12/01/2023] Open
Abstract
The semantic variant of primary progressive aphasia (svPPA), known also as "semantic dementia (SD)," is a neurodegenerative disorder that pertains to the frontotemporal lobar degeneration clinical syndromes. There is currently no approved pharmacological therapy for all frontotemporal dementia variants. Transcranial direct current stimulation (tDCS) is a promising non-invasive brain stimulation technique capable of modulating cortical excitability through a sub-threshold shift in neuronal resting potential. This technique has previously been applied as adjunct treatment in Alzheimer's disease, while data for frontotemporal dementia are controversial. In this scoped review, we summarize and critically appraise the currently available evidence regarding the use of tDCS for improving performance in naming and/or matching tasks in patients with svPPA. Clinical trials addressing this topic were identified through MEDLINE (accessed by PubMed) and Web of Science, as of November 2022, week 3. Clinical trials have been unable to show a significant benefit of tDCS in enhancing semantic performance in svPPA patients. The heterogeneity of the studies available in the literature might be a possible explanation. Nevertheless, the results of these studies are promising and may offer valuable insights into methodological differences and overlaps, raising interest among researchers in identifying new non-pharmacological strategies for treating svPPA patients. Further studies are therefore warranted to investigate the potential therapeutic role of tDCS in svPPA.
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Affiliation(s)
- Davide Norata
- Department of Medicine and Surgery, Unit of Neurology, Neurophysiology, Neurobiology and Psychiatry, Università Campus Bio-Medico di Roma, Rome, Italy
- Neurological Clinic, Department of Experimental and Clinical Medicine (DIMSC), Marche Polytechnic University, Ancona, Italy
| | - Francesco Motolese
- Department of Medicine and Surgery, Unit of Neurology, Neurophysiology, Neurobiology and Psychiatry, Università Campus Bio-Medico di Roma, Rome, Italy
- Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Alessandro Magliozzi
- Department of Medicine and Surgery, Unit of Neurology, Neurophysiology, Neurobiology and Psychiatry, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Fabio Pilato
- Department of Medicine and Surgery, Unit of Neurology, Neurophysiology, Neurobiology and Psychiatry, Università Campus Bio-Medico di Roma, Rome, Italy
- Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Vincenzo Di Lazzaro
- Department of Medicine and Surgery, Unit of Neurology, Neurophysiology, Neurobiology and Psychiatry, Università Campus Bio-Medico di Roma, Rome, Italy
- Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Simona Luzzi
- Neurological Clinic, Department of Experimental and Clinical Medicine (DIMSC), Marche Polytechnic University, Ancona, Italy
| | - Fioravante Capone
- Department of Medicine and Surgery, Unit of Neurology, Neurophysiology, Neurobiology and Psychiatry, Università Campus Bio-Medico di Roma, Rome, Italy
- Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
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Medeiros W, Barros T, Caixeta FV. Bibliometric mapping of non-invasive brain stimulation techniques (NIBS) for fluent speech production. Front Hum Neurosci 2023; 17:1164890. [PMID: 37425291 PMCID: PMC10323431 DOI: 10.3389/fnhum.2023.1164890] [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: 02/13/2023] [Accepted: 05/30/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Language production is a finely regulated process, with many aspects which still elude comprehension. From a motor perspective, speech involves over a hundred different muscles functioning in coordination. As science and technology evolve, new approaches are used to study speech production and treat its disorders, and there is growing interest in the use of non-invasive modulation by means of transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS). Methods Here we analyzed data obtained from Scopus (Elsevier) using VOSViewer to provide an overview of bibliographic mapping of citation, co-occurrence of keywords, co-citation and bibliographic coupling of non-invasive brain stimulation (NIBS) use in speech research. Results In total, 253 documents were found, being 55% from only three countries (USA, Germany and Italy), with emerging economies such as Brazil and China becoming relevant in this topic recently. Most documents were published in this last decade, with 2022 being the most productive yet, showing brain stimulation has untapped potential for the speech research field. Discussion Keyword analysis indicates a move away from basic research on the motor control in healthy speech, toward clinical applications such as stuttering and aphasia treatment. We also observe a recent trend in cerebellar modulation for clinical treatment. Finally, we discuss how NIBS have established over the years and gained prominence as tools in speech therapy and research, and highlight potential methodological possibilities for future research.
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Borrego-Écija S, Montagut N, Martín-Trias P, Vaqué-Alcázar L, Illán-Gala I, Balasa M, Lladó A, Casanova-Mollà J, Bargalló N, Valls-Solé J, Lleó A, Bartrés-Faz D, Sánchez-Valle R. Multifocal Transcranial Direct Current Stimulation in Primary Progressive Aphasia Does Not Provide a Clinical Benefit Over Speech Therapy. J Alzheimers Dis 2023:JAD230069. [PMID: 37182884 DOI: 10.3233/jad-230069] [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: 05/16/2023]
Abstract
BACKGROUND Primary progressive aphasia (PPA) is a group of neurodegenerative disorders including Alzheimer's disease and frontotemporal dementia characterized by language deterioration. Transcranial direct current stimulation (tDCS) is a non-invasive intervention for brain dysfunction. OBJECTIVE To evaluate the tolerability and efficacy of tDCS combined with speech therapy in the three variants of PPA. We evaluate changes in fMRI activity in a subset of patients. METHODS Double-blinded, randomized, cross-over, and sham-controlled tDCS study. 15 patients with PPA were included. Each patient underwent two interventions: a) speech therapy + active tDCS and b) speech therapy + sham tDCS stimulation. A multifocal strategy with anodes placed in the left frontal and parietal regions was used to stimulate the entire language network. Efficacy was evaluated by comparing the results of two independent sets of neuropsychological assessments administered at baseline, immediately after the intervention, and at 1 month and 3 months after the intervention. In a subsample, fMRI scanning was performed before and after each intervention. RESULTS The interventions were well tolerated. Participants in both arms showed clinical improvement, but no differences were found between active and sham tDCS interventions in any of the evaluations. There were trends toward better outcomes in the active tDCS group for semantic association and reading skills. fMRI identified an activity increase in the right frontal medial cortex and the bilateral paracingulate gyrus after the active tDCS intervention. CONCLUSION We did not find differences between active and sham tDCS stimulation in clinical scores of language function in PPA patients.
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Affiliation(s)
- Sergi Borrego-Écija
- Alzheimer's disease and other cognitive disorders Unit. Neurology Service, Hospital Clinic de Barcelona, Institutd'Investigació Biomèdica August Pi i Sunyer, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Nuria Montagut
- Alzheimer's disease and other cognitive disorders Unit. Neurology Service, Hospital Clinic de Barcelona, Institutd'Investigació Biomèdica August Pi i Sunyer, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Pablo Martín-Trias
- Medical Psychology Unit, Department of Medicine, Faculty of Medicine and Health Sciences, Insitute of Neurosciences, University of Barcelona; Institut d'Investigació Biomèdica August Pi i Sunyer, Barcelona, Spain
| | - Lídia Vaqué-Alcázar
- Medical Psychology Unit, Department of Medicine, Faculty of Medicine and Health Sciences, Insitute of Neurosciences, University of Barcelona; Institut d'Investigació Biomèdica August Pi i Sunyer, Barcelona, Spain
| | - Ignacio Illán-Gala
- Memory Unit, Service of Neurology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain. Centro de Investigación en Red en enfermedadesneurogenerativas (CIBERNED), Madrid, Spain
| | - Mircea Balasa
- Alzheimer's disease and other cognitive disorders Unit. Neurology Service, Hospital Clinic de Barcelona, Institutd'Investigació Biomèdica August Pi i Sunyer, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Albert Lladó
- Alzheimer's disease and other cognitive disorders Unit. Neurology Service, Hospital Clinic de Barcelona, Institutd'Investigació Biomèdica August Pi i Sunyer, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Jordi Casanova-Mollà
- Clinical Neurophysiology Unit, Institutd'Investigació Biomèdica August Pi i Sunyer, NeurologyService, Hospital Clinic de Barcelona, Barcelona, Spain
| | - Nuria Bargalló
- Radiology Service, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Josep Valls-Solé
- Clinical Neurophysiology Unit, Institutd'Investigació Biomèdica August Pi i Sunyer, NeurologyService, Hospital Clinic de Barcelona, Barcelona, Spain
| | - Alberto Lleó
- Memory Unit, Service of Neurology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain. Centro de Investigación en Red en enfermedadesneurogenerativas (CIBERNED), Madrid, Spain
| | - David Bartrés-Faz
- Medical Psychology Unit, Department of Medicine, Faculty of Medicine and Health Sciences, Insitute of Neurosciences, University of Barcelona; Institut d'Investigació Biomèdica August Pi i Sunyer, Barcelona, Spain
| | - Raquel Sánchez-Valle
- Alzheimer's disease and other cognitive disorders Unit. Neurology Service, Hospital Clinic de Barcelona, Institutd'Investigació Biomèdica August Pi i Sunyer, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
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Marsh EB, Girgenti S, Llinas EJ, Brunson AO. Outcomes in Patients with Minor Stroke: Diagnosis and Management in the Post-thrombectomy Era. Neurotherapeutics 2023; 20:732-743. [PMID: 36752947 PMCID: PMC10275835 DOI: 10.1007/s13311-023-01349-5] [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] [Accepted: 01/24/2023] [Indexed: 02/09/2023] Open
Abstract
In the era of mechanical thrombectomy and better preventative strategies, a higher number of patients are being discharged home from the hospital with the so-called minor strokes. This has significantly changed the landscape of stroke recovery. Unfortunately, while symptoms may be categorized as mild compared to individuals with higher NIH Stroke Scale scores, the physical, cognitive, and emotional sequelae can be disabling and result in failure to return to work and poor quality of life in a population with significant potential to recover fully. In this review, we discuss the current state of minor stroke, the most common pattern of resulting deficits, what is known about the underlying pathophysiology that leads to a relatively global pattern of impaired cognition following an infarct in any location, and special considerations for treatment based on this population's unique needs. Raising awareness of the current morbidity associated with minor stroke, the need for a uniform definition that allows for comparisons of individuals across studies, and further research focused on this population to optimize outcomes, has the potential to significantly improve recovery.
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Affiliation(s)
- Elisabeth B Marsh
- Department of Neurology, Johns Hopkins Hospital, The Johns Hopkins University School of Medicine, 600 North Wolfe St, Baltimore, MD 21287, USA.
| | - Sophia Girgenti
- Department of Neurology, Johns Hopkins Hospital, The Johns Hopkins University School of Medicine, 600 North Wolfe St, Baltimore, MD 21287, USA
| | - Edward J Llinas
- Department of Neurology, Johns Hopkins Hospital, The Johns Hopkins University School of Medicine, 600 North Wolfe St, Baltimore, MD 21287, USA
| | - Autumn O Brunson
- Department of Neurology, Johns Hopkins Hospital, The Johns Hopkins University School of Medicine, 600 North Wolfe St, Baltimore, MD 21287, USA
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17
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Salazar CA, Feng W, Bonilha L, Kautz S, Jensen JH, George MS, Rowland NC. Transcranial Direct Current Stimulation for Chronic Stroke: Is Neuroimaging the Answer to the Next Leap Forward? J Clin Med 2023; 12:2601. [PMID: 37048684 PMCID: PMC10094806 DOI: 10.3390/jcm12072601] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/20/2023] [Accepted: 03/22/2023] [Indexed: 03/31/2023] Open
Abstract
During rehabilitation, a large proportion of stroke patients either plateau or begin to lose motor skills. By priming the motor system, transcranial direct current stimulation (tDCS) is a promising clinical adjunct that could augment the gains acquired during therapy sessions. However, the extent to which patients show improvements following tDCS is highly variable. This variability may be due to heterogeneity in regions of cortical infarct, descending motor tract injury, and/or connectivity changes, all factors that require neuroimaging for precise quantification and that affect the actual amount and location of current delivery. If the relationship between these factors and tDCS efficacy were clarified, recovery from stroke using tDCS might be become more predictable. This review provides a comprehensive summary and timeline of the development of tDCS for stroke from the viewpoint of neuroimaging. Both animal and human studies that have explored detailed aspects of anatomy, connectivity, and brain activation dynamics relevant to tDCS are discussed. Selected computational works are also included to demonstrate how sophisticated strategies for reducing variable effects of tDCS, including electric field modeling, are moving the field ever closer towards the goal of personalizing tDCS for each individual. Finally, larger and more comprehensive randomized controlled trials involving tDCS for chronic stroke recovery are underway that likely will shed light on how specific tDCS parameters, such as dose, affect stroke outcomes. The success of these collective efforts will determine whether tDCS for chronic stroke gains regulatory approval and becomes clinical practice in the future.
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Affiliation(s)
- Claudia A. Salazar
- Department of Neurosurgery, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
- Center for Biomedical Imaging, University of South Carolina, Columbia, SC 29208, USA
- Department of Neuroscience, College of Graduate Studies, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Wuwei Feng
- Department of Neurology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Leonardo Bonilha
- Department of Neurology, College of Medicine, Emory University, Atlanta, GA 30322, USA
- Department of Neurology, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Steven Kautz
- Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC 29425, USA
- Ralph H. Johnson VA Medical Center, Charleston, SC 29401, USA
| | - Jens H. Jensen
- Center for Biomedical Imaging, University of South Carolina, Columbia, SC 29208, USA
- Department of Neuroscience, College of Graduate Studies, Medical University of South Carolina, Charleston, SC 29425, USA
- Department of Radiology and Radiological Science, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Mark S. George
- Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC 29425, USA
- Ralph H. Johnson VA Medical Center, Charleston, SC 29401, USA
- Department of Psychiatry, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Nathan C. Rowland
- Department of Neurosurgery, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
- Center for Biomedical Imaging, University of South Carolina, Columbia, SC 29208, USA
- Department of Neuroscience, College of Graduate Studies, Medical University of South Carolina, Charleston, SC 29425, USA
- Department of Neurology, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
- Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC 29425, USA
- Ralph H. Johnson VA Medical Center, Charleston, SC 29401, USA
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18
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Balboa-Bandeira Y, Zubiaurre-Elorza L, García-Guerrero MA, Ibarretxe-Bilbao N, Ojeda N, Peña J. Effects of transcranial electrical stimulation techniques on foreign vocabulary learning. Behav Brain Res 2023; 438:114165. [PMID: 36270464 DOI: 10.1016/j.bbr.2022.114165] [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: 04/13/2022] [Revised: 09/12/2022] [Accepted: 10/15/2022] [Indexed: 11/05/2022]
Abstract
Although the use of transcranial electrical stimulation (tES) techniques on healthy population has been linked to facilitating language learning, studies on their effects on foreign language learning processes are scarce and results remain unclear. The objective of this study was to analyze whether tES enhances foreign language learning processes. Sixty-four healthy native Spanish-speaking participants were randomly assigned to four groups (transcranial direct current, transcranial random noise, tDCS-tRNS stimulation, or sham). They completed two intervention sessions with a two-week gap in between. During the first session the participants received stimulation (1.5 mA) while learning new English words and then performed recall and recognition tasks. Learning was assessed at follow-up, two weeks later. No differences in learning between groups were observed in the first session (F(1,61)= .86; p = .36). At follow-up, significantly higher learning accuracy was observed after tRNS compared to sham (p = .037). These results suggest that tRNS could be helpful in improving the processes involved in foreign language vocabulary learning.
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Affiliation(s)
- Yolanda Balboa-Bandeira
- Department of Methods and Experimental Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain
| | - Leire Zubiaurre-Elorza
- Department of Methods and Experimental Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain
| | - M Acebo García-Guerrero
- Department of Methods and Experimental Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain
| | - Naroa Ibarretxe-Bilbao
- Department of Methods and Experimental Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain
| | - Natalia Ojeda
- Department of Methods and Experimental Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain
| | - Javier Peña
- Department of Methods and Experimental Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain.
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19
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Kamali AM, Ijadi M, Keshtkarhesamabadi B, Kazemiha M, Mahmoudi R, Roozbehi A, Nami M. A dual-mode neurostimulation approach to enhance athletic performance outcome in experienced taekwondo practitioners. Sci Rep 2023; 13:251. [PMID: 36604440 PMCID: PMC9816304 DOI: 10.1038/s41598-022-26610-3] [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: 09/06/2022] [Accepted: 12/16/2022] [Indexed: 01/07/2023] Open
Abstract
Transcranial Direct Current Stimulation (tDCS) is a growing empirical approach to improve athletic performance. Some recent studies have investigated the effects of transcutaneous spinal direct current stimulation (tsDCS) on the motor performance such as reaction time. TDCS and tsDCS can lead to alteration of the spontaneous neural activity, and the membrane potentials of motor neurons in cerebral cortex and spinal interneurons, respectively. Given the paucity of experimental studies on the non-invasive brain stimulation in the field of sports neuroscience, especially martial sports, the present study aimed at investigating the effects of neurostimulation in potentiating the motor and cognitive functions in experienced taekwondo practitioners. The study sample included 15 experienced male taekwondo players who received real or sham direct current stimulation on the primary motor cortex (M1) and the lumbar spinal segment (T12-L2) over two sessions, 72 h apart. Next, the performance of the participants was evaluated through a simulation of taekwondo exercise directly after the sham and real sessions. Moreover, a cognitive platform (CBS: Cambridge Brain Science) was used to investigate the participants' cognitive profile in each instance. Unlike sham stimulation, real tDCS was associated with improved selective attention and reaction time in both in the simulated task performance and cognitive examination. The concurrent cortical and trans-spinal tDCS was found to improve selective attention (31% performance improvement) (P < 0.0001) [EFFECT SIZE; 1.84]. and reduce reaction time (4.7% performance improvement) (P < 0.0001) [EFFECT SIZE; 0.02]. Meanwhile, the intervention failed to leave a significant change in cognitive functions evaluated through CBS (P > 0.05). As informed by our results, the present dual-mode neurostimulation could improve motor functions potentially through the effect of tsDCS over the spinal interneurons and tDCS over the primary motor cortex. Likewise, our findings suggested an improved performance in simulated taekwondo task after real- but not sham-stimulation. This study paves the way for designing neurostimulation protocols to improve the performance of professional athletes, namely martial art practitioners, including their accuracy and velocity of reactions. Such positive effects of neuostimulation in athletic performance as demonstrated in this research and similar reports are expected to enhance the athletes' success in professional competitions.
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Affiliation(s)
- Ali-Mohammad Kamali
- grid.412571.40000 0000 8819 4698Neuroscience Laboratory, NSL (Brain, Cognition and Behavior), Department of Neuroscience, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran ,Iranian Neuroscience Society-Fars Chapter, DANA Brain Health Institute, Shiraz, Iran
| | - Mojtaba Ijadi
- grid.413020.40000 0004 0384 8939Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Behnam Keshtkarhesamabadi
- Iranian Neuroscience Society-Fars Chapter, DANA Brain Health Institute, Shiraz, Iran ,High Performance Brain, Helena Félix Street, No. 7 to 7 D, 1600-121 Lisbon, Portugal
| | - Milad Kazemiha
- grid.412571.40000 0000 8819 4698Neuroscience Laboratory, NSL (Brain, Cognition and Behavior), Department of Neuroscience, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran ,Iranian Neuroscience Society-Fars Chapter, DANA Brain Health Institute, Shiraz, Iran
| | - Reza Mahmoudi
- grid.413020.40000 0004 0384 8939Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Amrollah Roozbehi
- Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran.
| | - Mohammad Nami
- Neuroscience Laboratory, NSL (Brain, Cognition and Behavior), Department of Neuroscience, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran. .,Iranian Neuroscience Society-Fars Chapter, DANA Brain Health Institute, Shiraz, Iran. .,Instituto de Investigaciones Científicas Y Servicios de Alta Tecnología (INDICASAT AIP), City of Knowledge, Neuroscience Center, Panama City, Panama. .,Harvard Alumni in Healthcare, Harvard University, Boston, MA, USA. .,Brain, Cognition, and Behavior Unit, BrainHub Academy, Dubai, United Arab Emirates.
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20
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Dugas CS, Keltner-Dorman E, Hart J. Differential effects from cognitive rehabilitation and high-definition tDCS in posterior cortical atrophy: A single-case experimental design. Neuropsychol Rehabil 2022; 32:1620-1642. [PMID: 34037503 DOI: 10.1080/09602011.2021.1927761] [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: 09/21/2020] [Accepted: 05/04/2021] [Indexed: 02/08/2023]
Abstract
Posterior cortical atrophy (PCA) is a progressive neurodegenerative syndrome characterized by visual-perceptual deficits, which impact daily life. Recent research has focused on non-pharmacological techniques to ameliorate these deficits, with the most common being cognitive rehabilitation. The present study investigates the differential effects of high definition-transcranial direct current stimulation (HD-tDCS) and cognitive rehabilitation in a single-case experimental design with two separate experimental phases in a patient with PCA. Experimental Phase 1 consisted of 10 sessions of HD-tDCS targeting the pre-SMA/dACC and Phase 2 consisted of 10 sessions of cognitive rehabilitation. Normed and standardized scores from figure copy and recall tests served as the primary outcome measures for visuospatial processing. The participant showed no immediate or long-term changes in visuospatial measures following HD-tDCS intervention. However, cognitive rehabilitation showed immediate improvement in visuospatial memory (figure recall) and clinically significant improvement in visuospatial construction (figure copy). Visuospatial construction gains remained in the low average range in the 10-week follow-up while visuospatial memory returned to baseline. Results indicated differential effects between HD-tDCS and cognitive rehabilitation with cognitive rehabilitation showing clinically significant improvement in primary outcome measures with sustained improvement in the long-term follow-up measure. Additional research is warranted to confirm these effects.
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Affiliation(s)
- Christine Sofka Dugas
- Department of Speech, Language and Hearing Sciences, University of Texas at Dallas, Dallas, TX, USA
| | - Elena Keltner-Dorman
- Department of Speech, Language and Hearing Sciences, University of Texas at Dallas, Dallas, TX, USA
| | - John Hart
- Department of Speech, Language and Hearing Sciences, University of Texas at Dallas, Dallas, TX, USA
- Department of Neurology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, USA
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21
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Mousavi N, Nitsche MA, Jahan A, Nazari MA, Hassanpour H. Efficacy of transcranial Direct Current Stimulation (tDCS) combined with intensive speech therapy for language production in monozygotic twins with corpus callosum dysgenesis (CCD): A sham-controlled single subject study. Neurocase 2022; 28:218-225. [PMID: 35533270 DOI: 10.1080/13554794.2022.2071626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The purpose of this single subject study was to investigate whether transcranial direct current stimulation (tDCS) applied to both hemispheres combined with speech therapy can improve language learning in a pair of 5-year-old twins with corpus callosum dysgenesis (CCD). The treatment protocol included anodal tDCS with simultaneous speech therapy in one of the participants (T.D.), and sham-tDCS with the same montage, and stimulation regime concomitant with speech therapy for the other twin (A.D.). Our findings show that T.D. improved in language production when treated with speech therapy in combination with tDCS. A.D. showed evidence for a relatively minor behavioral benefit from speech therapy.
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Affiliation(s)
- Najva Mousavi
- Department of Language and Speech Therapy, Faculty of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey
| | - Michael A Nitsche
- Department of Psychology and Neurosciences, Leibniz Research Centre for Working Environment and Human Factors (Ifado), Dortmund, Germany
| | - Ali Jahan
- Department of Speech Therapy, Faculty of Rehabilitation Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Ali Nazari
- Department of Neuroscience, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Hassan Hassanpour
- Faculty of Psychology and Social Sciences, Roudehen Branch, Islamic Azad University, Tehran, Iran
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22
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Matar SJ, Newton C, Sorinola IO, Pavlou M. Transcranial Direct-Current Stimulation as an Adjunct to Verb Network Strengthening Treatment in Post-stroke Chronic Aphasia: A Double-Blinded Randomized Feasibility Study. Front Neurol 2022; 13:722402. [PMID: 35309584 PMCID: PMC8924047 DOI: 10.3389/fneur.2022.722402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 01/24/2022] [Indexed: 11/24/2022] Open
Abstract
Background Difficulties in discourse production are common in post-stroke chronic aphasia. Previous studies have found that speech and language therapy combined with transcranial direct-current stimulation (tDCS) may improve language skills like naming and enhance aphasia treatment outcomes. However, very few studies have investigated the effect of tDCS when combined with interventions for improving higher level language skills such as the Verb Network Strengthening Treatment (VNeST). Aims This study aimed to determine the feasibility of anodal tDCS as an adjunct to VNeST to improve discourse production in post-stroke chronic aphasia. Methods Six people with post-stroke chronic aphasia took part in this double-blinded randomized feasibility study. Participants were randomly allocated to either the experimental group receiving a 6-week block of once weekly VNeST sessions combined with active tDCS over the left inferior frontal gyrus (LIFG) or a control group that received VNeST with sham stimulation. Feasibility outcomes included screening, eligibility, retention, and completion rates, and adverse events. Preliminary response to intervention was also examined using discourse production, functional communication, quality of life, psychological state, and cognition outcomes. Results Overall 19 individuals were screened and ten met the inclusion criteria. Six individuals provided consent and participated in the study giving a consent rate of 60%. Participant retention and completion rates were 100% and no adverse effects were reported. Exploratory analyses revealed promising changes (i.e., estimated large effect size) in discourse production measures across discourse language tasks and functional communication for the active tDCS group. Conclusions Our results support the feasibility of tDCS as an adjunct to VNeST. Preliminary findings provide motivation for future large-scale studies to better understand the potential of tDCS as a safe and economical tool for enhancing rehabilitation in chronic aphasia.
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Affiliation(s)
- Shereen J. Matar
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
| | - Caroline Newton
- Division of Psychology and Language Sciences, Faculty of Brain Sciences, University College London, London, United Kingdom
| | - Isaac O. Sorinola
- Department of Population Health Sciences, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
| | - Marousa Pavlou
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
- *Correspondence: Marousa Pavlou
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Yang C, Zhang T, Huang K, Xiong M, Liu H, Wang P, Zhang Y. Increased both cortical activation and functional connectivity after transcranial direct current stimulation in patients with post-stroke: A functional near-infrared spectroscopy study. Front Psychiatry 2022; 13:1046849. [PMID: 36569623 PMCID: PMC9784914 DOI: 10.3389/fpsyt.2022.1046849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 11/14/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Previous studies have shown that cognitive impairment is common after stroke. Transcranial direct current stimulation (tDCS) is a promising tool for rehabilitating cognitive impairment. This study aimed to investigate the effects of tDCS on the rehabilitation of cognitive impairment in patients with stroke. METHODS Twenty-two mild-moderate post-stroke patients with cognitive impairments were treated with 14 tDCS sessions. A total of 14 healthy individuals were included in the control group. Cognitive function was assessed using the Mini-Mental State Examination (MMSE) and the Montreal Cognitive Assessment (MoCA). Cortical activation was assessed using functional near-infrared spectroscopy (fNIRS) during the verbal fluency task (VFT). RESULTS The cognitive function of patients with stroke, as assessed by the MMSE and MoCA scores, was lower than that of healthy individuals but improved after tDCS. The cortical activation of patients with stroke was lower than that of healthy individuals in the left superior temporal cortex (lSTC), right superior temporal cortex (rSTC), right dorsolateral prefrontal cortex (rDLPFC), right ventrolateral prefrontal cortex (rVLPFC), and left ventrolateral prefrontal cortex (lVLPFC) cortical regions. Cortical activation increased in the lSTC cortex after tDCS. The functional connectivity (FC) between the cerebral hemispheres of patients with stroke was lower than that of healthy individuals but increased after tDCS. CONCLUSION The cognitive and brain functions of patients with mild-to-moderate stroke were damaged but recovered to a degree after tDCS. Increased cortical activation and increased FC between the bilateral cerebral hemispheres measured by fNIRS are promising biomarkers to assess the effectiveness of tDCS in stroke.
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Affiliation(s)
- Caihong Yang
- Department of Rehabilitation Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China.,School of Psychology, Central China Normal University, Wuhan, Hubei, China
| | - Tingyu Zhang
- Department of Rehabilitation Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Kaiqi Huang
- The Seventh Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Menghui Xiong
- Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Huiyu Liu
- Department of Rehabilitation Medicine, Yue Bei People's Hospital, Shaoguan, Guangdong, China
| | - Pu Wang
- Department of Rehabilitation Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China.,Department of Rehabilitation Medicine, Tianyang District People's Hospital, Baise, Guangxi, China
| | - Yan Zhang
- School of Educational Science, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Chiang HS, Motes M, O'Hair R, Vanneste S, Kraut M, Hart J. Baseline delayed verbal recall predicts response to high definition transcranial direct current stimulation targeting the superior medial frontal cortex. Neurosci Lett 2021; 764:136204. [PMID: 34478816 DOI: 10.1016/j.neulet.2021.136204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 08/25/2021] [Accepted: 08/29/2021] [Indexed: 11/21/2022]
Abstract
Anodal high definition transcranial direct current stimulation (HD-tDCS) targeting the pre-supplementary motor area/dorsal anterior cingulate cortex (pre-SMA/dACC) has recently been shown to improve verbal retrieval deficits in veterans with chronic traumatic brain injury (TBI) (Motes et al., 2020), but predictors of treatment response are unclear. We hypothesized that baseline delayed verbal recall, a sensitive measure for post-TBI chronic cognitive decline, would predict therapeutic effects of HD-tDCS targeting the pre-SMA/dACC for verbal retrieval deficits. Standardized verbal retrieval measures were administered at baseline, immediately after and 8 weeks after treatment completion. We applied mixed generalized linear modeling as a post-hoc subgroup analysis to the verbal retrieval scores that showed significant improvement in Motes at el. (2020) to examine effects of active stimulation across the groups with baseline-intact delayed recall (N = 10) and baseline-impaired delayed recall (N = 8), compared to sham (N = 7). Individuals with impaired baseline delayed recall showed significant improvement (compared to baseline) in both category fluency and color-word inhibition/switch, while individuals with intact delayed recall showed significant improvement only in color-word inhibition/switch. Baseline delayed verbal recall may therefore be considered as a predictor for future electromodulation studies targeting frontal structures to treat TBI-related verbal deficits.
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Affiliation(s)
- Hsueh-Sheng Chiang
- Department of Neurology, The University of Texas Southwestern Medical Center, USA; School of Behavioral and Brain Sciences, The University of Texas at Dallas, USA.
| | - Michael Motes
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, USA
| | - Rachel O'Hair
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, USA
| | - Sven Vanneste
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, USA; Global Brain Health Institute, Trinity College Dublin, Ireland
| | - Michael Kraut
- Department of Radiology, The Johns Hopkins University School of Medicine, USA
| | - John Hart
- Department of Neurology, The University of Texas Southwestern Medical Center, USA; School of Behavioral and Brain Sciences, The University of Texas at Dallas, USA; Department of Psychiatry, The University of Texas Southwestern Medical Center, USA
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25
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Coemans S, Struys E, Vandenborre D, Wilssens I, Engelborghs S, Paquier P, Tsapkini K, Keulen S. A Systematic Review of Transcranial Direct Current Stimulation in Primary Progressive Aphasia: Methodological Considerations. Front Aging Neurosci 2021; 13:710818. [PMID: 34690737 PMCID: PMC8530184 DOI: 10.3389/fnagi.2021.710818] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 08/09/2021] [Indexed: 11/30/2022] Open
Abstract
A variety of tDCS approaches has been used to investigate the potential of tDCS to improve language outcomes, or slow down the decay of language competences caused by Primary Progressive Aphasia (PPA). The employed stimulation protocols and study designs in PPA are generally speaking similar to those deployed in post-stroke aphasic populations. These two etiologies of aphasia however differ substantially in their pathophysiology, and for both conditions the optimal stimulation paradigm still needs to be established. A systematic review was done and after applying inclusion and exclusion criteria, 15 articles were analyzed focusing on differences and similarities across studies especially focusing on PPA patient characteristics (age, PPA variant, language background), tDCS stimulation protocols (intensity, frequency, combined therapy, electrode configuration) and study design as recent reviews and group outcomes for individual studies suggest tDCS is an effective tool to improve language outcomes, while methodological approach and patient characteristics are mentioned as moderators that may influence treatment effects. We found that studies of tDCS in PPA have clinical and methodological and heterogeneity regarding patient populations, stimulation protocols and study design. While positive group results are usually found irrespective of these differences, the magnitude, duration and generalization of these outcomes differ when comparing stimulation locations, and when results are stratified according to the clinical variant of PPA. We interpret the results of included studies in light of patient characteristics and methodological decisions. Further, we highlight the role neuroimaging can play in study protocols and interpreting results and make recommendations for future work.
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Affiliation(s)
- Silke Coemans
- Clinical and Experimental Neurolinguistics, CLIEN, Vrije Universiteit Brussel, Brussels, Belgium
| | - Esli Struys
- Clinical and Experimental Neurolinguistics, CLIEN, Vrije Universiteit Brussel, Brussels, Belgium
- Center for Neurosciences (C4N), Vrije Universiteit Brussel, Brussels, Belgium
| | - Dorien Vandenborre
- Department of Speech and Language Pathology, Thomas More University of Applied Sciences, Antwerp, Belgium
| | - Ineke Wilssens
- Department of Speech and Language Pathology, Thomas More University of Applied Sciences, Antwerp, Belgium
| | - Sebastiaan Engelborghs
- Center for Neurosciences (C4N), Vrije Universiteit Brussel, Brussels, Belgium
- Department of Neurology, Universitair Ziekenhuis Brussel, Brussels, Belgium
- Reference Center for Biological Markers of Dementia, BIODEM, Institute Born-Bunge, Universiteit Antwerpen, Antwerp, Belgium
| | - Philippe Paquier
- Clinical and Experimental Neurolinguistics, CLIEN, Vrije Universiteit Brussel, Brussels, Belgium
- Center for Research in Cognition and Neurosciences (CRCN), Université Libre de Bruxelles, Antwerp, Belgium
- Department of Translational Neurosciences (TNW), Universiteit Antwerpen, Antwerp, Belgium
| | - Kyrana Tsapkini
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, United States
- Department of Cognitive Science, Johns Hopkins University, Baltimore, MD, United States
| | - Stefanie Keulen
- Clinical and Experimental Neurolinguistics, CLIEN, Vrije Universiteit Brussel, Brussels, Belgium
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26
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Bolling AJ, King VL, Enam T, McDonough IM. Using transcranial direct current stimulation (tDCS) on the dorsolateral prefrontal cortex to promote long-term foreign language vocabulary learning. Brain Cogn 2021; 154:105789. [PMID: 34509124 DOI: 10.1016/j.bandc.2021.105789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 08/22/2021] [Accepted: 08/27/2021] [Indexed: 11/26/2022]
Abstract
Transcranial direct current stimulation (tDCS) on the dorsolateral prefrontal cortex (DLPFC) was used to improve foreign-langue learning while using mental imagery. Participants underwent two sessions of 1 mA, 1.5 mA, or sham stimulation prior to learning Swahili-English word pairs two consecutive days. During learning, participants were encouraged to create a mental image of the associated English word. Twenty-four hours after learning and one week later, participants received a cued recall test. A linear dose-response effect of stimulation was found across both tests that occurred long after the immediate effects of stimulation. Follow-up comparisons revealed that only the 1.5 mA condition differed from the sham group. Exploratory moderating effects revealed interactions with sleep quality and handedness. Those with poorer sleep and who were left-handed showed greater recall after 1.5 mA of stimulation than those with better sleep and right-handers. A follow-up behavioral study probing strategy usage indicated that mental imagery strategy use did not strongly impact learning but point to other possible mechanisms including the importance of attending to multimodal perceptual details and memory consolidation. This preliminary evidence supports the role of the DLPFC or connected regions in foreign language vocabulary learning and verbal memory encoding.
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Affiliation(s)
- A Jordan Bolling
- Department of Psychology, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Victoria L King
- Department of Psychology, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Tasnuva Enam
- Department of Psychology, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Ian M McDonough
- Department of Psychology, The University of Alabama, Tuscaloosa, AL 35487, USA.
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27
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Balboa-Bandeira Y, Zubiaurre-Elorza L, Ibarretxe-Bilbao N, Ojeda N, Peña J. Effects of transcranial electrical stimulation techniques on second and foreign language learning enhancement in healthy adults: A systematic review and meta-analysis. Neuropsychologia 2021; 160:107985. [PMID: 34371068 DOI: 10.1016/j.neuropsychologia.2021.107985] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/26/2021] [Accepted: 08/02/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Transcranial electrical stimulation (tES) techniques have been used to enhance different cognitive domains such as language in healthy adults. While several reviews and meta-analysis have been conducted on the effects of tES on different language skills (picture naming, verbal fluency, word reading), there has been little research conducted to date on the effects of tES on the processes involved in foreign language learning. OBJECTIVE A meta-analysis was performed to quantify the effects of tES on foreign language learning processes (non-words, artificial grammar, and foreign languages), focusing on accuracy, response times and 1-week follow-up effects, if reported by the studies. RESULTS Eleven studies that had sham condition were reviewed. Nine of them were analyzed, including five using within-participant design, and four that employed between-participant design. The final analysis encompassed nine studies with 279 healthy participants. The analysis showed moderate enhancing effects of tES on overall language learning (g = 0.50, 95 % CI [0.29, 0.71], p = .0001). However, results were not significant on follow up data (g = 0.54, 95 % CI [-0.12, 1.20], p = .07), and on response times (g = 0.50, 95 % CI [-0.1, 1.18], p = .10). The effects were significantly moderated by years of education. CONCLUSIONS The results suggest that tES seems to enhance the mechanisms involved in foreign language learning; however, more research is needed to understand the impact scope of these techniques on language learning processes.
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Affiliation(s)
| | | | | | - Natalia Ojeda
- Department of Methods and Experimental Psychology, University of Deusto, Bilbao, Spain
| | - Javier Peña
- Department of Methods and Experimental Psychology, University of Deusto, Bilbao, Spain.
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28
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Friehs MA, Frings C, Hartwigsen G. Effects of single-session transcranial direct current stimulation on reactive response inhibition. Neurosci Biobehav Rev 2021; 128:749-765. [PMID: 34271027 DOI: 10.1016/j.neubiorev.2021.07.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 06/30/2021] [Accepted: 07/11/2021] [Indexed: 01/03/2023]
Abstract
Transcranial direct current stimulation (tDCS) is widely used to explore the role of various cortical regions for reactive response inhibition. In recent years, tDCS studies reported polarity-, time- and stimulation-site dependent effects on response inhibition. Given the large parameter space in which study designs, tDCS procedures and task procedures can differ, it is crucial to systematically explore the existing tDCS literature to increase the current understanding of potential modulatory effects and limitations of different approaches. We performed a systematic review on the modulatory effects of tDCS on response inhibition as measured by the Stop-Signal Task. The final dataset shows a large variation in methodology and heterogeneous effects of tDCS on performance. The most consistent result across studies is a performance enhancement due to anodal tDCS over the right prefrontal cortex. Partially sub-optimal choices in study design, methodology and lacking consistency in reporting procedures may impede valid conclusions and obscured the effects of tDCS on response inhibition in some previous studies. Finally, we outline future directions and areas to improve research.
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Affiliation(s)
| | - Christian Frings
- Trier University, Department of Cognitive Psychology and Methodology, Trier, Germany
| | - Gesa Hartwigsen
- Lise Meitner Research Group Cognition and Plasticity, Max Planck Institute for Human Cognitive Brain Sciences, Leipzig, Germany
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29
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Suárez-García DMA, Birba A, Zimerman M, Diazgranados JA, Lopes da Cunha P, Ibáñez A, Grisales-Cárdenas JS, Cardona JF, García AM. Rekindling Action Language: A Neuromodulatory Study on Parkinson's Disease Patients. Brain Sci 2021; 11:887. [PMID: 34356122 PMCID: PMC8301982 DOI: 10.3390/brainsci11070887] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 06/25/2021] [Indexed: 12/21/2022] Open
Abstract
Impairments of action semantics (a cognitive domain that critically engages motor brain networks) are pervasive in early Parkinson's disease (PD). However, no study has examined whether action semantic skills in persons with this disease can be influenced by non-invasive neuromodulation. Here, we recruited 22 PD patients and performed a five-day randomized, blinded, sham-controlled study to assess whether anodal transcranial direct current stimulation (atDCS) over the primary motor cortex, combined with cognitive training, can boost action-concept processing. On day 1, participants completed a picture-word association (PWA) task involving action-verb and object-noun conditions. They were then randomly assigned to either an atDCS (n = 11, 2 mA for 20 m) or a sham tDCS (n = 11, 2 mA for 30 s) group and performed an online PWA practice over three days. On day 5, they repeated the initial protocol. Relative to sham tDCS, the atDCS group exhibited faster reaction times for action (as opposed to object) concepts in the post-stimulation test. This result was exclusive to the atDCS group and held irrespective of the subjects' cognitive, executive, and motor skills, further attesting to its specificity. Our findings suggest that action-concept deficits in PD are distinctively grounded in motor networks and might be countered by direct neuromodulation of such circuits. Moreover, they provide new evidence for neurosemantic models and inform a thriving agenda in the embodied cognition framework.
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Affiliation(s)
- Diana M. A. Suárez-García
- Facultad de Psicología, Universidad del Valle, Santiago de Cali 76001, Colombia; (D.M.A.S.-G.); (J.S.G.-C.)
| | - Agustina Birba
- Cognitive Neuroscience Center (CNC), Universidad de San Andrés, Buenos Aires B1644BID, Argentina; (A.B.); (M.Z.); (P.L.d.C.); (A.I.)
- National Scientific and Technical Research Council (CONICET), Buenos Aires C1033AAJ, Argentina
| | - Máximo Zimerman
- Cognitive Neuroscience Center (CNC), Universidad de San Andrés, Buenos Aires B1644BID, Argentina; (A.B.); (M.Z.); (P.L.d.C.); (A.I.)
| | - Jesús A. Diazgranados
- Centro Médico de Atención Neurológica “Neurólogos de Occidente”, Santiago de Cali 76001, Colombia;
| | - Pamela Lopes da Cunha
- Cognitive Neuroscience Center (CNC), Universidad de San Andrés, Buenos Aires B1644BID, Argentina; (A.B.); (M.Z.); (P.L.d.C.); (A.I.)
- Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT), Buenos Aires C1425FQD, Argentina
| | - Agustín Ibáñez
- Cognitive Neuroscience Center (CNC), Universidad de San Andrés, Buenos Aires B1644BID, Argentina; (A.B.); (M.Z.); (P.L.d.C.); (A.I.)
- National Scientific and Technical Research Council (CONICET), Buenos Aires C1033AAJ, Argentina
- Global Brain Health Institute (GBHI), University of California San Francisco (UCSF), San Francisco, CA 94143, USA
- Trinity College Dublin (TCD), D02R590 Dublin 2, Ireland
- Latin American Brain Health Institute (BrainLat), Universidad Adolfo Ibáñez, Santiago 8320000, Chile
| | - Johan S. Grisales-Cárdenas
- Facultad de Psicología, Universidad del Valle, Santiago de Cali 76001, Colombia; (D.M.A.S.-G.); (J.S.G.-C.)
| | - Juan Felipe Cardona
- Facultad de Psicología, Universidad del Valle, Santiago de Cali 76001, Colombia; (D.M.A.S.-G.); (J.S.G.-C.)
| | - Adolfo M. García
- Cognitive Neuroscience Center (CNC), Universidad de San Andrés, Buenos Aires B1644BID, Argentina; (A.B.); (M.Z.); (P.L.d.C.); (A.I.)
- National Scientific and Technical Research Council (CONICET), Buenos Aires C1033AAJ, Argentina
- Global Brain Health Institute (GBHI), University of California San Francisco (UCSF), San Francisco, CA 94143, USA
- Trinity College Dublin (TCD), D02R590 Dublin 2, Ireland
- Faculty of Education, National University of Cuyo (UNCuyo), Mendoza M5502GKA, Argentina
- Departamento de Lingüística y Literatura, Facultad de Humanidades, Universidad de Santiago de Chile, Santiago 9170020, Chile
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Smirni D, Oliveri M, Misuraca E, Catania A, Vernuccio L, Picciolo V, Inzerillo F, Barbagallo M, Cipolotti L, Turriziani P. Verbal Fluency in Mild Alzheimer's Disease: Transcranial Direct Current Stimulation over the Dorsolateral Prefrontal Cortex. J Alzheimers Dis 2021; 81:1273-1283. [PMID: 33935089 DOI: 10.3233/jad-210003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Recent studies showed that in healthy controls and in aphasic patients, inhibitory trains of repetitive transcranial magnetic stimulation (rTMS) over the right prefrontal cortex can improve phonemic fluency performance, while anodal transcranial direct current stimulation (tDCS) over the left prefrontal cortex can improve performance in naming and semantic fluency tasks. OBJECTIVE This study aimed at investigating the effects of cathodal tDCS over the left or the right dorsolateral prefrontal cortex (DLPFC) on verbal fluency tasks (VFT) in patients with mild Alzheimer's disease (AD). METHODS Forty mild AD patients participated in the study (mean age 73.17±5.61 years). All participants underwent cognitive baseline tasks and a VFT twice. Twenty patients randomly received cathodal tDCS to the left or the right DLPFC, and twenty patients were assigned to a control group in which only the two measures of VFT were taken, without the administration of the tDCS. RESULTS A significant improvement of performance on the VFT in AD patients was present after tDCS over the right DLPFC (p = 0.001). Instead, no difference was detected between the two VFTs sessions after tDCS over the left DLPFC (p = 0.42). Furthermore, these results cannot be related to task learning effects, since no significant difference was found between the two VFT sessions in the control group (p = 0.73). CONCLUSION These data suggest that tDCS over DLPFC can improve VFT performance in AD patients. A hypothesis is that tDCS enhances adaptive patterns of brain activity between functionally connected areas.
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Affiliation(s)
- Daniela Smirni
- Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy.,NeuroTeam Life and Science, Palermo, Italy
| | - Massimiliano Oliveri
- Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy.,NeuroTeam Life and Science, Palermo, Italy
| | | | | | - Laura Vernuccio
- Geriatric Unit, Department of Internal Medicine and Geriatrics, University of Palermo, Palermo, Italy
| | - Valentina Picciolo
- Geriatric Unit, Department of Internal Medicine and Geriatrics, University of Palermo, Palermo, Italy
| | - Flora Inzerillo
- Geriatric Unit, Department of Internal Medicine and Geriatrics, University of Palermo, Palermo, Italy
| | - Mario Barbagallo
- Geriatric Unit, Department of Internal Medicine and Geriatrics, University of Palermo, Palermo, Italy
| | - Lisa Cipolotti
- Department of Neuropsychology, National Hospital for Neurology and Neurosurgery, London, UK
| | - Patrizia Turriziani
- Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy.,NeuroTeam Life and Science, Palermo, Italy
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31
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de Aguiar V, Rofes A, Wendt H, Ficek BN, Webster K, Tsapkini K. Treating lexical retrieval using letter fluency and tDCS in primary progressive aphasia: a single-case study. APHASIOLOGY 2021; 36:353-379. [PMID: 38765920 PMCID: PMC11101187 DOI: 10.1080/02687038.2021.1881432] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 01/20/2021] [Indexed: 05/22/2024]
Abstract
Background In early stages, individuals with Primary Progressive Aphasia (PPA) report language symptoms while scoring within norm in formal language tests. Early intervention is important due to the progressive nature of the disease. Method We report a single case study of an individual with logopenic variant PPA (lvPPA). We tested whether letter fluency, used as a therapy task, can improve lexical retrieval when combined with tDCS to either the left inferior-frontal gyrus (IFG) or the left inferior parietal lobe (IPL), administered in two separate therapy phases separated by a wash-out period of three months. Outcomes and results We observed increases in number of words retrieved during a letter fluency task in trained and untrained letters, when letter fluency therapy (LeFT) was administered with anodal tDCS. When LeFT was combined with left IFG stimulation, words produced in a letter fluency task were lower frequency and higher age of acquisition after treatment, compared to before treatment and there was also an increase in accuracy and response times in an untrained picture-naming task. Conclusions The results indicate that letter fluency therapy combined anodal tDCS is effective in improving lexical retrieval, particularly when left IFG stimulation was used. Effects generalize beyond the trained task, albeit slowing down of responses in picture naming. This task may provide a useful clinical intervention strategy for patients with mild anomia, who are not challenged enough by traditional naming therapies.
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Affiliation(s)
- Vânia de Aguiar
- Department of Neurology, Johns Hopkins Medicine
- Center for Language and Cognition Groningen (CLCG), University of Groningen
| | - Adrià Rofes
- Center for Language and Cognition Groningen (CLCG), University of Groningen
- Department of Cognitive Science, Johns Hopkins University
| | - Haley Wendt
- Department of Neurology, Johns Hopkins Medicine
| | | | - Kimberly Webster
- Department of Neurology, Johns Hopkins Medicine
- Department of Otolaryngology – Head and Neck Surgery, Johns Hopkins Medicine
| | - Kyrana Tsapkini
- Department of Neurology, Johns Hopkins Medicine
- Department of Otolaryngology – Head and Neck Surgery, Johns Hopkins Medicine
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Kierońska S, Świtońska M, Meder G, Piotrowska M, Sokal P. Tractography Alterations in the Arcuate and Uncinate Fasciculi in Post-Stroke Aphasia. Brain Sci 2021; 11:brainsci11010053. [PMID: 33466403 PMCID: PMC7824889 DOI: 10.3390/brainsci11010053] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 12/31/2020] [Accepted: 01/02/2021] [Indexed: 01/01/2023] Open
Abstract
Fiber tractography based on diffuse tensor imaging (DTI) can reveal three-dimensional white matter connectivity of the human brain. Tractography is a non-invasive method of visualizing cerebral white matter structures in vivo, including neural pathways surrounding the ischemic area. DTI may be useful for elucidating alterations in brain connectivity resulting from neuroplasticity after stroke. We present a case of a male patient who developed significant mixed aphasia following ischemic stroke. The patient had been treated by mechanical thrombectomy followed by an early rehabilitation, in conjunction with transcranial direct current stimulation (tDCS). DTI was used to examine the arcuate fasciculus and uncinate fasciculus upon admission and again at three months post-stroke. Results showed an improvement in the patient’s symptoms of aphasia, which was associated with changes in the volume and numbers of tracts in the uncinate fasciculus and the arcuate fasciculus.
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Affiliation(s)
- Sara Kierońska
- Department of Neurosurgery and Neurology, Jan Biziel University Hospital No. 2, Collegium Medicum, Nicolaus Copernicus University, 85-168 Bydgoszcz, Poland; (S.K.); (M.Ś.); (M.P.)
| | - Milena Świtońska
- Department of Neurosurgery and Neurology, Jan Biziel University Hospital No. 2, Collegium Medicum, Nicolaus Copernicus University, 85-168 Bydgoszcz, Poland; (S.K.); (M.Ś.); (M.P.)
- Faculty of Health Science, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University, 85-067 Bydgoszcz, Poland
| | - Grzegorz Meder
- Department of Interventional Radiology, Jan Biziel University Hospital No. 2, 85-168 Bydgoszcz, Poland;
| | - Magdalena Piotrowska
- Department of Neurosurgery and Neurology, Jan Biziel University Hospital No. 2, Collegium Medicum, Nicolaus Copernicus University, 85-168 Bydgoszcz, Poland; (S.K.); (M.Ś.); (M.P.)
| | - Paweł Sokal
- Department of Neurosurgery and Neurology, Jan Biziel University Hospital No. 2, Collegium Medicum, Nicolaus Copernicus University, 85-168 Bydgoszcz, Poland; (S.K.); (M.Ś.); (M.P.)
- Faculty of Health Science, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University, 85-067 Bydgoszcz, Poland
- Correspondence: ; Tel.: +48-600954415
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The left prefrontal cortex supports inhibitory processing during semantic memory retrieval. Cortex 2020; 134:296-306. [PMID: 33316604 DOI: 10.1016/j.cortex.2020.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 10/05/2020] [Accepted: 11/02/2020] [Indexed: 12/22/2022]
Abstract
Semantic control refers to a set of neural and cognitive mechanisms that govern semantic processing and retrieval. Neuroimaging studies have indicated that controlled semantic processing engages the left prefrontal cortex (PFC), yet the functional role of the prefrontal activity in semantic control is poorly understood and was therefore addressed in the present study. We used a double-blind randomized controlled experiment, in which participants from three distinct groups received anodal transcranial direct current stimulation (tDCS) over left lateral PFC (n = 40), a control tDCS over temporoparietal cortex (n = 40), or sham stimulation (n = 41), while executing automatic and controlled semantic retrieval tasks as well as additional control tasks assessing working memory and semantic judgement. We demonstrate that anodal tDCS of the left lateral PFC improved inhibition of prepotent semantic associations but had no significant effect on retrieval of habitual associates or switching between retrieval rules. The prefrontal tDCS also enhanced working memory capacity, but this effect did not account for the improved semantic inhibition. The control temporoparietal tDCS did not affect semantic retrieval. Our findings show that semantic inhibition and switching represent distinct components of the semantic control system and indicate that the left lateral PFC is involved in a filtering process that constrains the accessible semantic representations (i.e., a proactive pre-retrieval inhibition) or suppresses already retrieved responses (i.e., a retroactive post-retrieval inhibition). The recognition of such an inhibitory process could inspire novel treatments targeting altered semantic processing.
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Scott TL, Haenchen L, Daliri A, Chartove J, Guenther FH, Perrachione TK. Noninvasive neurostimulation of left ventral motor cortex enhances sensorimotor adaptation in speech production. BRAIN AND LANGUAGE 2020; 209:104840. [PMID: 32738502 PMCID: PMC7484095 DOI: 10.1016/j.bandl.2020.104840] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 05/27/2020] [Accepted: 07/15/2020] [Indexed: 05/21/2023]
Abstract
Sensorimotor adaptation-enduring changes to motor commands due to sensory feedback-allows speakers to match their articulations to intended speech acoustics. How the brain integrates auditory feedback to modify speech motor commands and what limits the degree of these modifications remain unknown. Here, we investigated the role of speech motor cortex in modifying stored speech motor plans. In a within-subjects design, participants underwent separate sessions of sham and anodal transcranial direct current stimulation (tDCS) over speech motor cortex while speaking and receiving altered auditory feedback of the first formant. Anodal tDCS increased the rate of sensorimotor adaptation for feedback perturbation. Computational modeling of our results using the Directions Into Velocities of Articulators (DIVA) framework of speech production suggested that tDCS primarily affected behavior by increasing the feedforward learning rate. This study demonstrates how focal noninvasive neurostimulation can enhance the integration of auditory feedback into speech motor plans.
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Affiliation(s)
- Terri L Scott
- Department of Speech, Language, & Hearing Sciences, Boston University, Boston, MA 02215, United States; Graduate Program for Neuroscience, Boston University, Boston, MA 02215, United States
| | - Laura Haenchen
- Department of Speech, Language, & Hearing Sciences, Boston University, Boston, MA 02215, United States
| | - Ayoub Daliri
- Department of Speech, Language, & Hearing Sciences, Boston University, Boston, MA 02215, United States; College of Health Solutions, Arizona State University, Tempe, AZ 85287, United States
| | - Julia Chartove
- Graduate Program for Neuroscience, Boston University, Boston, MA 02215, United States
| | - Frank H Guenther
- Department of Speech, Language, & Hearing Sciences, Boston University, Boston, MA 02215, United States; Department of Biomedical Engineering, Boston University, Boston, MA 02215, United States
| | - Tyler K Perrachione
- Department of Speech, Language, & Hearing Sciences, Boston University, Boston, MA 02215, United States.
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Ihara AS, Miyazaki A, Izawa Y, Takayama M, Hanayama K, Tanemura J. Enhancement of Facilitation Training for Aphasia by Transcranial Direct Current Stimulation. Front Hum Neurosci 2020; 14:573459. [PMID: 33024429 PMCID: PMC7516201 DOI: 10.3389/fnhum.2020.573459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/17/2020] [Indexed: 11/13/2022] Open
Abstract
We aimed to enhance the performance of naming and sentence production in chronic post-stroke aphasia by tablet-based language training combined with transcranial direct current stimulation (tDCS) conducted on non-consecutive days. We applied a deblocking method involved in stimulation–facilitation therapy to six participants with chronic aphasia who performed naming and sentence production tasks for impaired modalities, immediately after a spoken-word picture-matching task for an intact modality. The participants took part in two conditional sessions: a tDCS condition in which they performed a spoken word-picture matching task while we delivered an anodal tDCS over the left inferior frontal cortex; and a sham condition in which sham stimulation was delivered. We hypothesized that, compared with the sham stimulation, the application of anodal tDCS over the left inferior frontal cortex during the performance of tasks requiring access to semantic representations would enhance the deblocking effect, thereby improving the performances for subsequent naming and sentence production. Our results showed greater improvements 2 weeks after training with tDCS than those after training with sham stimulation. The accuracy rate of naming was significantly higher in the tDCS condition than in the sham condition, regardless of whether the words were trained or not. Also, we found a significant improvement in the production of related words and sentences for the untrained words in the tDCS condition, compared with that found pre-training, while in the sham condition we found no significant improvement compared with that found pre-training. These results support our hypothesis and suggest the effectiveness of the use of tDCS during language training on non-consecutive days.
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Affiliation(s)
- Aya S. Ihara
- Center for Information and Neural Networks, National Institute of Information and Communications Technology and Osaka University, Kobe, Japan
- *Correspondence: Aya S. Ihara
| | - Akiko Miyazaki
- Rehabilitation Center, Kawasaki Medical School Hospital, Kurashiki, Japan
| | - Yukihiro Izawa
- Department of Childhood Education, Faculty of Education, Fukuyama City University, Fukuyama, Japan
- Department of Rehabilitation, Okayama Rehabilitation Hospital, Okayama, Japan
| | - Misaki Takayama
- Department of Rehabilitation, Okayama Rehabilitation Hospital, Okayama, Japan
| | - Kozo Hanayama
- Department of Rehabilitation Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Jun Tanemura
- Faculty of Rehabilitation, Kawasaki University of Medical Welfare, Kurashiki, Japan
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Sharma G, Chowdhury SR. Statistical Analysis to Find out the Optimal Locations for Non Invasive Brain Stimulation. J Med Syst 2020; 44:85. [PMID: 32166505 DOI: 10.1007/s10916-020-1535-7] [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: 04/19/2019] [Accepted: 01/29/2020] [Indexed: 10/24/2022]
Abstract
Non-invasive brain electrical stimulation (NIBES) techniques are progressively used for modulation of neuronal membrane potentials, which alters cortical excitability. The neuronal activity depends on position of channel locations for electrodes and the amount and direction of injected weak current through the target neurons area. In the present paper hybrid near infrared spectroscopy and electroencephalogram (NIRS-EEG) open access dataset for brain computer interface (BCI) has been used to find the best locations for NIBES. The percentage oxygen saturation has been calculated with the help of provided NIRS experimental dataset of changes in concentration of oxy-hemoglobin (HbO2) and deoxy-hemoglobin (Hb) in thirty-six scalp site locations of twenty-eight healthy subjects. The variation in standard deviation have been calculated for given pre-processed EEG signals of thirty locations for same twenty-eight healthy subjects. The statistical one-way ANOVA method has been used to find out the best channels and locations which are having less variation in all motion artifacts. In this method, F value is calculated for these locations and those locations are selected which are significant at 99% confidence interval (P < 0.01). In this study, out of sixty-six locations sixteen best locations have been selected for non-invasive brain electrical stimulation. This pilot study has been used to find out the appropriate locations on the scalp sites to place the electrodes to provide weak direct current stimulation which are less affected by motion artifacts.
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Affiliation(s)
- Gaurav Sharma
- Biomedical Systems Laboratory, Multimedia, Analytics, Networks and Systems Group, School of Computing and Electrical Engineering, Indian Institute of Technology Mandi, Mandi, India.
| | - Shubhajit Roy Chowdhury
- Biomedical Systems Laboratory, Multimedia, Analytics, Networks and Systems Group, School of Computing and Electrical Engineering, Indian Institute of Technology Mandi, Mandi, India
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37
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Non-invasive brain stimulation to enhance cognitive rehabilitation after stroke. Neurosci Lett 2020; 719:133678. [DOI: 10.1016/j.neulet.2018.06.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 06/26/2018] [Indexed: 11/19/2022]
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38
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Cummine J, Villarena M, Onysyk T, Devlin JT. A Study of Null Effects for the Use of Transcranial Direct Current Stimulation (tDCS) in Adults With and Without Reading Impairment. NEUROBIOLOGY OF LANGUAGE (CAMBRIDGE, MASS.) 2020; 1:434-451. [PMID: 36793290 PMCID: PMC9923690 DOI: 10.1162/nol_a_00020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 07/19/2020] [Indexed: 05/09/2023]
Abstract
UNLABELLED There is evidence to support the hypothesis that the delivery of anodal transcranial direct current stimulation (tDCS) to the left temporoparietal junction can enhance performance on reading speed and reading accuracy (Costanzo et al., 2016b; Heth & Lavidor, 2015). Here, we explored whether we could demonstrate similar effects in adults with and without reading impairments. METHOD Adults with (N = 33) and without (N = 29) reading impairment were randomly assigned to anodal or sham stimulation conditions. All individuals underwent a battery of reading assessments pre and post stimulation. The stimulation session involved 15 min of anodal/sham stimulation over the left temporoparietal junction while concurrently completing a computerized nonword segmentation task known to activate the temporoparietal junction. RESULTS There were no conclusive findings that anodal stimulation impacted reading performance for skilled or impaired readers. CONCLUSIONS While tDCS may provide useful gains on reading performance in the paediatric population, much more work is needed to establish the parameters under which such findings would transfer to adult populations. The documentation, reporting, and interpreting of null effects of tDCS are immensely important to a field that is growing exponentially with much uncertainty.
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Affiliation(s)
| | - Miya Villarena
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
| | - Taylor Onysyk
- Communication Sciences and Disorders, University of Alberta, Edmonton, Canada
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Evans C, Bachmann C, Lee JS, Gregoriou E, Ward N, Bestmann S. Dose-controlled tDCS reduces electric field intensity variability at a cortical target site. Brain Stimul 2020; 13:125-136. [DOI: 10.1016/j.brs.2019.10.004] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 08/26/2019] [Accepted: 10/03/2019] [Indexed: 01/30/2023] Open
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40
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Cotelli M, Manenti R, Ferrari C, Gobbi E, Macis A, Cappa SF. Effectiveness of language training and non-invasive brain stimulation on oral and written naming performance in Primary Progressive Aphasia: A meta-analysis and systematic review. Neurosci Biobehav Rev 2020; 108:498-525. [DOI: 10.1016/j.neubiorev.2019.12.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 10/11/2019] [Accepted: 12/03/2019] [Indexed: 12/14/2022]
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41
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Ruttorf M, Kristensen S, Schad LR, Almeida J. Transcranial Direct Current Stimulation Alters Functional Network Structure in Humans: A Graph Theoretical Analysis. IEEE TRANSACTIONS ON MEDICAL IMAGING 2019; 38:2829-2837. [PMID: 31071024 DOI: 10.1109/tmi.2019.2915206] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Transcranial direct current stimulation (tDCS) is routinely used in basic and clinical research, but its efficacy has been challenged on a methodological, statistical and technical basis recently. The arguments against tDCS derive from an insufficient understanding of how this technique interacts with brain processes physiologically. Because of its potential as a central tool in neuroscience, it is important to clarify whether tDCS affects neuronal activity. Here, we investigate influences of offline tDCS on network architecture measured by functional magnetic resonance imaging. Applied to one network node only, offline tDCS affects the architecture of the entire functional network. Furthermore, offline tDCS exerts polarity-specific effects on the topology of the functional network attached. Our results confirm in a functioning brain and in a bias free and independent fashion that offline tDCS influences neuronal activity. Moreover, our results suggest that network-specific connectivity has an important role in improving our understanding of the effects of tDCS.
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42
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Miterko LN, Baker KB, Beckinghausen J, Bradnam LV, Cheng MY, Cooperrider J, DeLong MR, Gornati SV, Hallett M, Heck DH, Hoebeek FE, Kouzani AZ, Kuo SH, Louis ED, Machado A, Manto M, McCambridge AB, Nitsche MA, Taib NOB, Popa T, Tanaka M, Timmann D, Steinberg GK, Wang EH, Wichmann T, Xie T, Sillitoe RV. Consensus Paper: Experimental Neurostimulation of the Cerebellum. CEREBELLUM (LONDON, ENGLAND) 2019; 18:1064-1097. [PMID: 31165428 PMCID: PMC6867990 DOI: 10.1007/s12311-019-01041-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The cerebellum is best known for its role in controlling motor behaviors. However, recent work supports the view that it also influences non-motor behaviors. The contribution of the cerebellum towards different brain functions is underscored by its involvement in a diverse and increasing number of neurological and neuropsychiatric conditions including ataxia, dystonia, essential tremor, Parkinson's disease (PD), epilepsy, stroke, multiple sclerosis, autism spectrum disorders, dyslexia, attention deficit hyperactivity disorder (ADHD), and schizophrenia. Although there are no cures for these conditions, cerebellar stimulation is quickly gaining attention for symptomatic alleviation, as cerebellar circuitry has arisen as a promising target for invasive and non-invasive neuromodulation. This consensus paper brings together experts from the fields of neurophysiology, neurology, and neurosurgery to discuss recent efforts in using the cerebellum as a therapeutic intervention. We report on the most advanced techniques for manipulating cerebellar circuits in humans and animal models and define key hurdles and questions for moving forward.
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Affiliation(s)
- Lauren N Miterko
- Department of Pathology and Immunology, Department of Neuroscience, Program in Developmental Biology, Baylor College of Medicine, Jan and Dan Duncan Neurological Research Institute of Texas Children's Hospital, 1250 Moursund Street, Suite 1325, Houston, TX, 77030, USA
| | - Kenneth B Baker
- Neurological Institute, Department of Neurosurgery, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Jaclyn Beckinghausen
- Department of Pathology and Immunology, Department of Neuroscience, Program in Developmental Biology, Baylor College of Medicine, Jan and Dan Duncan Neurological Research Institute of Texas Children's Hospital, 1250 Moursund Street, Suite 1325, Houston, TX, 77030, USA
| | - Lynley V Bradnam
- Department of Exercise Science, Faculty of Science, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Michelle Y Cheng
- Department of Neurosurgery, Stanford University School of Medicine, 1201 Welch Road, MSLS P352, Stanford, CA, 94305-5487, USA
| | - Jessica Cooperrider
- Neurological Institute, Department of Neurosurgery, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Mahlon R DeLong
- Department of Neurology, Emory University, Atlanta, GA, 30322, USA
| | - Simona V Gornati
- Department of Neuroscience, Erasmus Medical Center, 3015 AA, Rotterdam, Netherlands
| | - Mark Hallett
- Human Motor Control Section, NINDS, NIH, Building 10, Room 7D37, 10 Center Dr MSC 1428, Bethesda, MD, 20892-1428, USA
| | - Detlef H Heck
- Department of Anatomy and Neurobiology, University of Tennessee Health Science Center, 855 Monroe Ave, Memphis, TN, 38163, USA
| | - Freek E Hoebeek
- Department of Neuroscience, Erasmus Medical Center, 3015 AA, Rotterdam, Netherlands
- NIDOD Department, Wilhelmina Children's Hospital, University Medical Center Utrecht Brain Center, Utrecht, Netherlands
| | - Abbas Z Kouzani
- School of Engineering, Deakin University, Geelong, VIC, 3216, Australia
| | - Sheng-Han Kuo
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, 10032, USA
| | - Elan D Louis
- Department of Neurology, Yale School of Medicine, Department of Chronic Disease Epidemiology, Yale School of Public Health, Center for Neuroepidemiology and Clinical Research, Yale School of Medicine, Yale University, New Haven, CT, 06520, USA
| | - Andre Machado
- Neurological Institute, Department of Neurosurgery, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Mario Manto
- Service de Neurologie, CHU-Charleroi, 6000, Charleroi, Belgium
- Service des Neurosciences, Université de Mons, 7000, Mons, Belgium
| | - Alana B McCambridge
- Graduate School of Health, Physiotherapy, University of Technology Sydney, PO Box 123, Broadway, Sydney, NSW, 2007, Australia
| | - Michael A Nitsche
- Department of Psychology and Neurosiences, Leibniz Research Centre for Working Environment and Human Factors, Dortmund, Germany
- Department of Neurology, University Medical Hospital Bergmannsheil, Bochum, Germany
| | | | - Traian Popa
- Human Motor Control Section, NINDS, NIH, Building 10, Room 7D37, 10 Center Dr MSC 1428, Bethesda, MD, 20892-1428, USA
- Defitech Chair of Clinical Neuroengineering, Center for Neuroprosthetics (CNP) and Brain Mind Institute (BMI), Ecole Polytechnique Federale de Lausanne (EPFL), Sion, Switzerland
| | - Masaki Tanaka
- Department of Physiology, Hokkaido University School of Medicine, Sapporo, 060-8638, Japan
| | - Dagmar Timmann
- Department of Neurology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Gary K Steinberg
- Department of Neurosurgery, Stanford University School of Medicine, 1201 Welch Road, MSLS P352, Stanford, CA, 94305-5487, USA
- R281 Department of Neurosurgery, Stanfod University School of Medicine, 300 Pasteur Drive, Stanford, CA, 94305, USA
| | - Eric H Wang
- Department of Neurosurgery, Stanford University School of Medicine, 1201 Welch Road, MSLS P352, Stanford, CA, 94305-5487, USA
| | - Thomas Wichmann
- Department of Neurology, Emory University, Atlanta, GA, 30322, USA
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, 30322, USA
| | - Tao Xie
- Department of Neurology, University of Chicago, 5841 S. Maryland Avenue, MC 2030, Chicago, IL, 60637-1470, USA
| | - Roy V Sillitoe
- Department of Pathology and Immunology, Department of Neuroscience, Program in Developmental Biology, Baylor College of Medicine, Jan and Dan Duncan Neurological Research Institute of Texas Children's Hospital, 1250 Moursund Street, Suite 1325, Houston, TX, 77030, USA.
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Sanches C, Levy R, Benisty S, Volpe-Gillot L, Habert MO, Kas A, Ströer S, Pyatigorskaya N, Kaglik A, Bourbon A, Dubois B, Migliaccio R, Valero-Cabré A, Teichmann M. Testing the therapeutic effects of transcranial direct current stimulation (tDCS) in semantic dementia: a double blind, sham controlled, randomized clinical trial. Trials 2019; 20:632. [PMID: 31747967 PMCID: PMC6868701 DOI: 10.1186/s13063-019-3613-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 07/23/2019] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Semantic dementia is a neurodegenerative disease that primarily affects the left anterior temporal lobe, resulting in a gradual loss of conceptual knowledge. There is currently no validated treatment. Transcranial stimulation has provided evidence for long-lasting language effects presumably linked to stimulation-induced neuroplasticity in post-stroke aphasia. However, studies evaluating its effects in neurodegenerative diseases such as semantic dementia are still rare and evidence from double-blind, prospective, therapeutic trials is required. OBJECTIVE The primary objective of the present clinical trial (STIM-SD) is to evaluate the therapeutic efficacy of a multiday transcranial direct current stimulation (tDCS) regime on language impairment in patients with semantic dementia. The study also explores the time course of potential tDCS-driven improvements and uses imaging biomarkers that could reflect stimulation-induced neuroplasticity. METHODS This is a double-blind, sham-controlled, randomized study using transcranial Direct Current Stimulation (tDCS) applied daily for 10 days, and language/semantic and imaging assessments at four time points: baseline, 3 days, 2 weeks and 4 months after 10 stimulation sessions. Language/semantic assessments will be carried out at these same 4 time points. Fluorodeoxyglucose positron emission tomography (FDG-PET), resting-state functional magnetic resonance imaging (rs-fMRI), T1-weighted images and white matter diffusion tensor imaging (DTI) will be applied at baseline and at the 2-week time point. According to the principle of inter-hemispheric inhibition between left (language-related) and right homotopic regions we will use two stimulation modalities - left-anodal and right-cathodal tDCS over the anterior temporal lobes. Accordingly, the patient population (n = 60) will be subdivided into three subgroups: left-anodal tDCS (n = 20), right-cathodal tDCS (n = 20) and sham tDCS (n = 20). The stimulation will be sustained for 20 min at an intensity of 1.59 mA. It will be delivered through 25cm2-round stimulation electrodes (current density of 0.06 mA/cm2) placed over the left and right anterior temporal lobes for anodal and cathodal stimulation, respectively. A group of healthy participants (n = 20) matched by age, gender and education will also be recruited and tested to provide normative values for the language/semantic tasks and imaging measures. DISCUSSION The aim of this study is to assess the efficacy of tDCS for language/semantic disorders in semantic dementia. A potential treatment would be easily applicable, inexpensive, and renewable when therapeutic effects disappear due to disease progression. TRIAL REGISTRATION ClinicalTrials.gov NCT03481933. Registered on March 2018.
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Affiliation(s)
- Clara Sanches
- Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Frontlab team, Paris, France.,Groupe de Dynamiques Cérébrales, Plasticité et Rééducation, FrontLab team, Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Paris, France
| | - Richard Levy
- Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Frontlab team, Paris, France.,Department of Neurology, National Reference Center for « Rare or Early Onset Dementias », Pitié Salpêtrière Hospital, AP-HP, 47-83 Boulevard de l'Hôpital, 75013, Paris, France
| | | | | | - Marie-Odile Habert
- Department of Nuclear Medicine, Hôpital de la Pitié-Salpêtrière, AP-HP, Paris, France.,CATI Multicenter Neuroimaging Platform, Paris, France.,Laboratoire d'Imagerie Biomédicale, Sorbonne Université, Inserm U1146, CNRS UMR, Paris, France
| | - Aurelie Kas
- Department of Nuclear Medicine, Hôpital de la Pitié-Salpêtrière, AP-HP, Paris, France.,Laboratoire d'Imagerie Biomédicale, Sorbonne Université, Inserm U1146, CNRS UMR, Paris, France
| | - Sébastian Ströer
- Department of Neuroradiology, Hôpital de la Pitié-Salpêtrière, AP-HP, Paris, France
| | - Nadya Pyatigorskaya
- Department of Neuroradiology, Hôpital de la Pitié-Salpêtrière, AP-HP, Paris, France.,Institut du Cerveau et de la Moelle Epinière, Center for NeuroImaging Research - CENIR, Paris, France
| | - Anna Kaglik
- Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Frontlab team, Paris, France.,Groupe de Dynamiques Cérébrales, Plasticité et Rééducation, FrontLab team, Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Paris, France.,Unité de Recherche Clinique (URC) Pitié-Salpêtrière, Charles Foix, AP-HP, Paris, France
| | - Angelina Bourbon
- Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Frontlab team, Paris, France.,Groupe de Dynamiques Cérébrales, Plasticité et Rééducation, FrontLab team, Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Paris, France
| | - Bruno Dubois
- Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Frontlab team, Paris, France.,Department of Neurology, National Reference Center for « Rare or Early Onset Dementias », Pitié Salpêtrière Hospital, AP-HP, 47-83 Boulevard de l'Hôpital, 75013, Paris, France
| | - Raffaella Migliaccio
- Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Frontlab team, Paris, France.,Department of Neurology, National Reference Center for « Rare or Early Onset Dementias », Pitié Salpêtrière Hospital, AP-HP, 47-83 Boulevard de l'Hôpital, 75013, Paris, France
| | - Antoni Valero-Cabré
- Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Frontlab team, Paris, France. .,Groupe de Dynamiques Cérébrales, Plasticité et Rééducation, FrontLab team, Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Paris, France. .,Laboratory for Cerebral Dynamics Plasticity and Rehabilitation, Boston University School of Medicine, Boston, MA, USA. .,Cognitive Neuroscience and Information Technology Research Program, Open University of Catalonia (UOC), Barcelona, Spain.
| | - Marc Teichmann
- Institut du Cerveau et de la Moelle Epinière, ICM, INSERM U 1127, CNRS UMR 7225, Sorbonne Université, Frontlab team, Paris, France. .,Department of Neurology, National Reference Center for « Rare or Early Onset Dementias », Pitié Salpêtrière Hospital, AP-HP, 47-83 Boulevard de l'Hôpital, 75013, Paris, France.
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de Aguiar V, Zhao Y, Ficek BN, Webster K, Rofes A, Wendt H, Frangakis C, Caffo B, Hillis AE, Rapp B, Tsapkini K. Cognitive and language performance predicts effects of spelling intervention and tDCS in Primary Progressive Aphasia. Cortex 2019; 124:66-84. [PMID: 31838450 DOI: 10.1016/j.cortex.2019.11.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 03/16/2019] [Accepted: 11/04/2019] [Indexed: 11/25/2022]
Abstract
Predictors of treatment effects allow individual tailoring of treatment characteristics, thereby saving resources and optimizing outcomes. Electrical stimulation coupled with language intervention has shown promising results in improving language performance in individuals with Primary Progressive Aphasia (PPA). The current study aimed to identify language and cognitive variables associated with response to therapy consisting of language intervention combined with transcranial direct current stimulation (tDCS). Forty individuals with PPA received written naming/spelling intervention combined with anodal tDCS or Sham, using a between-subjects, randomized design, with intervention delivered over a period of 3 weeks. Participants were assessed using a battery of neuropsychological tests before and after each phase. We measured letter accuracy during spelling of trained and untrained words, before, immediately after, 2 weeks, and 2 months after therapy. We used step-wise regression methods to identify variables amongst the neuropsychological measures and experimental factors that were significantly associated with therapy outcomes at each time-point. For trained words, improvement was related to pre-therapy scores, in RAVLT (5 trials sum), pseudoword spelling, object naming, digit span backward, spatial span backward and years post symptom onset. Regarding generalization to untrained words, improvement in spelling was associated with pseudoword spelling, RAVLT proactive interference, RAVLT immediate recall. Generalization effects were larger under tDCS compared to Sham at the 2-month post training measurement. We conclude that, for trained words, patients who improve the most are those who retain for longer language skills such as sublexical spelling processes (phoneme-to-grapheme correspondences) and word retrieval, and other cognitive functions such as executive functions and working memory, and those who have a better learning capacity. Generalization to untrained words occurs through improvement in knowledge of phoneme-to-grapheme correspondences. Furthermore, tDCS enhances the generalizability and duration of therapy effects.
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Affiliation(s)
- Vânia de Aguiar
- Department of Neurology, Johns Hopkins Medicine; Centre for Language and Cognition Groningen (CLCG), University of Groningen.
| | - Yi Zhao
- Department of Biostatistics, Johns Hopkins School of Public Health
| | | | - Kimberly Webster
- Department of Neurology, Johns Hopkins Medicine; Department of Otolaryngology, Johns Hopkins Medicine
| | - Adrià Rofes
- Centre for Language and Cognition Groningen (CLCG), University of Groningen; Global Brain Health Institute, Trinity College Dublin, Dublin, Ireland; Department of Cognitive Science, Johns Hopkins University
| | - Haley Wendt
- Department of Neurology, Johns Hopkins Medicine
| | | | - Brian Caffo
- Department of Biostatistics, Johns Hopkins School of Public Health
| | - Argye E Hillis
- Department of Neurology, Johns Hopkins Medicine; Department of Cognitive Science, Johns Hopkins University; Department of Physical Medicine & Rehabilitation, Johns Hopkins University
| | - Brenda Rapp
- Department of Cognitive Science, Johns Hopkins University
| | - Kyrana Tsapkini
- Department of Neurology, Johns Hopkins Medicine; Department of Cognitive Science, Johns Hopkins University
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Wang J, Wu D, Cheng Y, Song W, Yuan Y, Zhang X, Zhang D, Zhang T, Wang Z, Tang J, Yin L. Effects of Transcranial Direct Current Stimulation on Apraxia of Speech and Cortical Activation in Patients With Stroke: A Randomized Sham-Controlled Study. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2019; 28:1625-1637. [PMID: 31618056 DOI: 10.1044/2019_ajslp-19-0069] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Purpose The study aims to investigate, using anodal transcranial direct current stimulation (A-tDCS), over which site, the left lip region of primary motor cortex (M1) or the Broca's area, there would be better recovery from apraxia of speech (AoS) in patients with poststroke aphasia and to examine for altered activation in speech-related areas after tDCS with nonlinear electroencephalography (EEG). Method Fifty-two patients with AoS were randomized into A-tDCS over the left M1 (A-tDCS-M1), Broca's area, and sham tDCS groups who underwent 10 sessions of tDCS and speech treatment for 5 days. The EEG nonlinear index of approximate entropy was calculated for 6 subjects in each group before and after treatment. Results After treatment, the change in speech-language performance improved more significantly in the A-tDCS-M1 group than the other 2 groups (p < .05). EEG approximate entropy indicated that both A-tDCS groups could activate the stimulated sites; the improvement in the A-tDCS-M1 group was correlated with high activation in the dorsal lateral prefrontal cortex and Broca's areas of the left hemisphere in addition to the stimulated site. Conclusion A-tDCS over the left M1 can improve the speech function in patients with poststroke aphasia and severe AoS and excite and recruit more areas in the motor speech network.
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Affiliation(s)
- Jie Wang
- Department of Rehabilitation, Wangjing Hospital of China Academy of Chinese Medical Science, Beijing, China
- Department of Rehabilitation, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Dongyu Wu
- Department of Rehabilitation, Wangjing Hospital of China Academy of Chinese Medical Science, Beijing, China
| | - Yinan Cheng
- Department of Rehabilitation, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Weiqun Song
- Department of Rehabilitation, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Ying Yuan
- Department of Rehabilitation, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Xu Zhang
- Department of Rehabilitation, Wangjing Hospital of China Academy of Chinese Medical Science, Beijing, China
| | - Dahua Zhang
- Department of Rehabilitation, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Tiantian Zhang
- Department of Rehabilitation, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Zhuo Wang
- Department of Rehabilitation, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Jingwen Tang
- Department of Integrated Traditional Chinese and Western Medicine Oncology, Affiliated Tumor Hospital of Zhengzhou University, China
| | - Ling Yin
- Department of Health Care, Zunyi Academician Center, China
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Affiliation(s)
- Shauna Berube
- From the Departments of Physical Medicine and Rehabilitation and Neurology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Argye E Hillis
- From the Departments of Physical Medicine and Rehabilitation and Neurology, Johns Hopkins University School of Medicine, Baltimore, MD
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47
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Roncero C, Mardigyan V, Service E, Singerman J, Whittaker KC, Friedman M, Chertkow H. Investigation into the effect of transcranial direct current stimulation on cardiac pacemakers. Brain Stimul 2019; 13:89-95. [PMID: 31481297 DOI: 10.1016/j.brs.2019.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/10/2019] [Accepted: 08/16/2019] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Studies investigating the therapeutic applications of transcranial direct current stimulation (tDCS) in the treatment of age-related neurodegenerative disease have been promising. However, exclusion criteria for these studies invariably disqualify patients implanted with internal cardiac pacemakers, citing safety concerns. Because the majority of cardiac pacemaker implantees are over 65, this criterion may limit candidacy for tDCS based research and/or treatment of age-related neurodegenerative disease. OBJECTIVE/HYPOTHESIS We will test the hypothesis that tDCS impacts pacemaker function. Strong electrical potentials, such as those generated by external defibrillators (∼500 V, ∼10 A), are known to occasionally damage pacemaker circuitry and software, but it seems unlikely tDCS would damage a pacemaker because it involves about 1/200th the energy (∼12 V, ∼2 mA) of an external defibrillator. METHODS We delivered tDCS to seven participants (ages 70-92) with bipolar non-dependent pacemakers and subsequently collected data from the internal memory of the pacemakers to assess the tDCS signal detection, as well as alterations in mode switches, impedance levels, and pacing. Subsequently, similar assessments were carried out in participants who were pacemaker-dependent (ages 89-91). RESULTS After a review of the recordings, it was found that tDCS had no impact on the non-dependant, as well as the dependent, pacemakers. There were zero mode switches nor any impact on impedance levels. CONCLUSION Results in this small series of cases found no evidence that tDCS interferes with the function of the pacemakers and suggests tDCS can be delivered to patients equipped with a cardiac pacemaker. Further studies are needed to generalize these results to other pacemakers.
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Affiliation(s)
- Carlos Roncero
- Rotman Research Institute, Baycrest Health Science, Toronto, Canada; Lady Davis Institute, Jewish General Hospital, McGill University, 3755 Chemin de la cote Sainte-Catherine, H3T 1E2, Montreal, Quebec, Canada.
| | - Vartan Mardigyan
- Dept. of Cardiology, Jewish General Hospital, 3755 Chemin de la cote Sainte-Catherine, H3T 1E2, Montreal, Quebec, Canada.
| | - Erik Service
- Lady Davis Institute, Jewish General Hospital, McGill University, 3755 Chemin de la cote Sainte-Catherine, H3T 1E2, Montreal, Quebec, Canada.
| | - Julia Singerman
- Lady Davis Institute, Jewish General Hospital, McGill University, 3755 Chemin de la cote Sainte-Catherine, H3T 1E2, Montreal, Quebec, Canada.
| | - Kayla Chennelle Whittaker
- Lady Davis Institute, Jewish General Hospital, McGill University, 3755 Chemin de la cote Sainte-Catherine, H3T 1E2, Montreal, Quebec, Canada.
| | - Michal Friedman
- Lady Davis Institute, Jewish General Hospital, McGill University, 3755 Chemin de la cote Sainte-Catherine, H3T 1E2, Montreal, Quebec, Canada.
| | - Howard Chertkow
- Rotman Research Institute, Baycrest Health Science, Toronto, Canada; Lady Davis Institute, Jewish General Hospital, McGill University, 3755 Chemin de la cote Sainte-Catherine, H3T 1E2, Montreal, Quebec, Canada.
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Bhattacharjee S, Kashyap R, Rapp B, Oishi K, Desmond JE, Chen SHA. Simulation Analyses of tDCS Montages for the Investigation of Dorsal and Ventral Pathways. Sci Rep 2019; 9:12178. [PMID: 31434911 PMCID: PMC6704077 DOI: 10.1038/s41598-019-47654-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 07/17/2019] [Indexed: 01/11/2023] Open
Abstract
Modulating higher cognitive functions like reading with transcranial direct current stimulation (tDCS) can be challenging as reading involves regions in the dorsal and ventral cortical areas that lie in close proximity. If the two pathways are stimulated simultaneously, the function of dorsal pathway (predominantly used for graphophonological conversion) might interfere with the function of the ventral pathway (used for semantics), and vice-versa. To achieve functional specificity in tDCS for investigating the two pathways of reading, it is important to stimulate each pathway per session such that the spread of current across the cortical areas due to the two montages has minimal overlap. The present study intends to achieve this by introducing a systematic approach for tDCS analysis. We employed the COMETS2 software to simulate 10 montage configurations (5 for each pathway) for three electrode sizes: 5 × 5, 3 × 3, and 5 × 7 cm2. This diversity in montage configuration is chosen since previous studies found the position and the size of anode and cathode to play an important role. The values of the magnitude of current density (MCD) obtained from the configuration were used to calculate: (i) average MCD in each cortical lobe, (ii) number of overlapping coordinates, and (iii) cortical areas with high MCD. The measures (i) and (iii) ascertained the current spread by each montage within a cortical lobe, and (ii) verified the overlap of the spread of current between a pair of montages. The analyses show that a montage using the electrode size of 5 × 5 cm2 with the anode at CP5 and cathode at CZ, and another with anode at TP7 and cathode at nape of the neck are optimal choices for dorsal and ventral pathways, respectively. To verify, we cross-validated the results with ROAST. This systematic approach was helpful in reducing the ambiguity of montage selection prior to conducting a tDCS study.
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Affiliation(s)
| | - Rajan Kashyap
- Centre for Research and Development in Learning (CRADLE), Nanyang Technological University, Singapore, Singapore
| | - Brenda Rapp
- The Johns Hopkins University, Kreiger School of Arts and Sciences, Baltimore, United States
| | - Kenichi Oishi
- The Johns Hopkins University, School of Medicine, Baltimore, United States
| | - John E Desmond
- Department of Neurology, The Johns Hopkins University, School of Medicine, Baltimore, United States.
| | - S H Annabel Chen
- Psychology, Nanyang Technological University, Singapore, Singapore.
- Centre for Research and Development in Learning (CRADLE), Nanyang Technological University, Singapore, Singapore.
- Lee Kong Chian School of Medicine (LKC Medicine), Nanyang Technological University, Singapore, Singapore.
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Rodrigues de Almeida L, Pope PA, Hansen PC. Task load modulates tDCS effects on language performance. J Neurosci Res 2019; 97:1430-1454. [DOI: 10.1002/jnr.24490] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/29/2019] [Accepted: 06/14/2019] [Indexed: 12/22/2022]
Affiliation(s)
| | - Paul A. Pope
- School of Psychology University of Birmingham Birmingham UK
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50
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Cavinato M, Genna C, Formaggio E, Gregorio C, Storti SF, Manganotti P, Casanova E, Piperno R, Piccione F. Behavioural and electrophysiological effects of tDCS to prefrontal cortex in patients with disorders of consciousness. Clin Neurophysiol 2019; 130:231-238. [DOI: 10.1016/j.clinph.2018.10.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/04/2018] [Accepted: 10/24/2018] [Indexed: 10/27/2022]
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