1
|
Pak RJ, Ku JB, Abd-Elsayed A. Neuromodulation for Craniofacial Pain and Headaches. Biomedicines 2023; 11:3328. [PMID: 38137549 PMCID: PMC10741888 DOI: 10.3390/biomedicines11123328] [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: 11/16/2023] [Revised: 12/08/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023] Open
Abstract
Headaches and facial pain are highly prevalent diseases but are often difficult to treat. Though there have been significant advances in medical management, many continue to suffer from refractory pain. Neuromodulation has been gaining interest for its therapeutic purposes in many chronic pain conditions, including headaches and facial pain. There are many potential targets of neuromodulation for headache and facial pain, and some have more robust evidence in favor of their use than others. Despite the need for more high-quality research, the available evidence for the use of neuromodulation in treating headaches and facial pain is promising. Considering the suffering that afflicts patients with intractable headache, neuromodulation may be an appropriate tool to improve not only pain but also disability and quality of life.
Collapse
Affiliation(s)
- Ray J. Pak
- Department of Physical Medicine and Rehabilitation, New York Medical College, Metropolitan Hospital, New York, NY 10029, USA;
| | - Jun B. Ku
- Department of Physical Medicine and Rehabilitation, New York Medical College, Metropolitan Hospital, New York, NY 10029, USA;
| | - Alaa Abd-Elsayed
- Department of Anesthesia, University of Wisconsin, Madison, WI 53792, USA
| |
Collapse
|
2
|
Shlobin NA, Wu C. Current Neurostimulation Therapies for Chronic Pain Conditions. Curr Pain Headache Rep 2023; 27:719-728. [PMID: 37728863 DOI: 10.1007/s11916-023-01168-5] [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: 08/09/2023] [Indexed: 09/21/2023]
Abstract
PURPOSE OF REVIEW Neurostimulation treatment options have become more commonly used for chronic pain conditions refractory to these options. In this review, we characterize current neurostimulation therapies for chronic pain conditions and provide an analysis of their effectiveness and clinical adoption. This manuscript will inform clinicians of treatment options for chronic pain. RECENT FINDINGS Non-invasive neurostimulation includes transcranial direct current stimulation and repetitive transcranial magnetic stimulation, while more invasive options include spinal cord stimulation (SCS), peripheral nerve stimulation (PNS), dorsal root ganglion stimulation, motor cortex stimulation, and deep brain stimulation. Developments in transcranial direct current stimulation, repetitive transcranial magnetic stimulation, spinal cord stimulation, and peripheral nerve stimulation render these modalities most promising for the alleviating chronic pain. Neurostimulation for chronic pain involves non-invasive and invasive modalities with varying efficacy. Well-designed randomized controlled trials are required to delineate the outcomes of neurostimulatory modalities more precisely.
Collapse
Affiliation(s)
- Nathan A Shlobin
- Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Chengyuan Wu
- Department of Neurological Surgery, Thomas Jefferson University Hospitals, 909 Walnut Street, Floor 2, Philadelphia, PA, 19107, USA.
| |
Collapse
|
3
|
Pleș H, Florian IA, Timis TL, Covache-Busuioc RA, Glavan LA, Dumitrascu DI, Popa AA, Bordeianu A, Ciurea AV. Migraine: Advances in the Pathogenesis and Treatment. Neurol Int 2023; 15:1052-1105. [PMID: 37755358 PMCID: PMC10535528 DOI: 10.3390/neurolint15030067] [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: 08/01/2023] [Revised: 08/28/2023] [Accepted: 08/28/2023] [Indexed: 09/28/2023] Open
Abstract
This article presents a comprehensive review on migraine, a prevalent neurological disorder characterized by chronic headaches, by focusing on their pathogenesis and treatment advances. By examining molecular markers and leveraging imaging techniques, the research identifies key mechanisms and triggers in migraine pathology, thereby improving our understanding of its pathophysiology. Special emphasis is given to the role of calcitonin gene-related peptide (CGRP) in migraine development. CGRP not only contributes to symptoms but also represents a promising therapeutic target, with inhibitors showing effectiveness in migraine management. The article further explores traditional medical treatments, scrutinizing the mechanisms, benefits, and limitations of commonly prescribed medications. This provides a segue into an analysis of emerging therapeutic strategies and their potential to enhance migraine management. Finally, the paper delves into neuromodulation as an innovative treatment modality. Clinical studies indicating its effectiveness in migraine management are reviewed, and the advantages and limitations of this technique are discussed. In summary, the article aims to enhance the understanding of migraine pathogenesis and present novel therapeutic possibilities that could revolutionize patient care.
Collapse
Affiliation(s)
- Horia Pleș
- Department of Neurosurgery, Centre for Cognitive Research in Neuropsychiatric Pathology (NeuroPsy-Cog), “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania;
| | - Ioan-Alexandru Florian
- Department of Neurosciences, “Iuliu Hatieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Teodora-Larisa Timis
- Department of Physiology, “Iuliu Hatieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Razvan-Adrian Covache-Busuioc
- Neurosurgery Department, “Carol Davila” University of Medicine and Pharmacy, 020021 București, Romania; (R.-A.C.-B.); (L.-A.G.); (D.-I.D.); (A.A.P.); (A.B.); (A.V.C.)
| | - Luca-Andrei Glavan
- Neurosurgery Department, “Carol Davila” University of Medicine and Pharmacy, 020021 București, Romania; (R.-A.C.-B.); (L.-A.G.); (D.-I.D.); (A.A.P.); (A.B.); (A.V.C.)
| | - David-Ioan Dumitrascu
- Neurosurgery Department, “Carol Davila” University of Medicine and Pharmacy, 020021 București, Romania; (R.-A.C.-B.); (L.-A.G.); (D.-I.D.); (A.A.P.); (A.B.); (A.V.C.)
| | - Andrei Adrian Popa
- Neurosurgery Department, “Carol Davila” University of Medicine and Pharmacy, 020021 București, Romania; (R.-A.C.-B.); (L.-A.G.); (D.-I.D.); (A.A.P.); (A.B.); (A.V.C.)
| | - Andrei Bordeianu
- Neurosurgery Department, “Carol Davila” University of Medicine and Pharmacy, 020021 București, Romania; (R.-A.C.-B.); (L.-A.G.); (D.-I.D.); (A.A.P.); (A.B.); (A.V.C.)
| | - Alexandru Vlad Ciurea
- Neurosurgery Department, “Carol Davila” University of Medicine and Pharmacy, 020021 București, Romania; (R.-A.C.-B.); (L.-A.G.); (D.-I.D.); (A.A.P.); (A.B.); (A.V.C.)
| |
Collapse
|
4
|
Daniel O, Tepper SJ, Deutsch L, Sharon R. External Concurrent Occipital and Trigeminal Neurostimulation Relieves Migraine Headache: A Prospective, Randomized, Double-Blind, Sham-Controlled Trial. Pain Ther 2022; 11:907-922. [PMID: 35661128 PMCID: PMC9314547 DOI: 10.1007/s40122-022-00394-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/05/2022] [Indexed: 01/11/2023] Open
Abstract
INTRODUCTION Current external peripheral nerve stimulation devices stimulate only one nerve. This prospective, randomized, double-blind, sham-controlled trial assessed efficacy, safety, and tolerability of a novel external combined occipital and trigeminal neurostimulation (eCOT-NS) device as a self-administered home treatment for migraine (Relivion®MG, Neurolief Ltd; Netanya, Israel). METHODS Episodic and chronic migraine subjects (N = 55) were randomized to receive active (n = 27) or sham (n = 28) treatment. Subjects received eCOT-NS devices and performed 60 ± 20-min home treatments within 45 min of migraine episode onset. The primary endpoint was relative (percent) change in mean baseline VAS pain scores 1 h after treatment initiation. Treatment outcomes assessed at 1-, 2-, and 24-h post-treatment initiation were pain reduction and proportion of pain-free subjects and treatment responders, defined as ≥ 50% pain reduction. Categorical pain ratings (none, mild, moderate, and severe pain) were also analyzed. RESULTS Active stimulation was significantly more effective than sham stimulation for decreasing pain intensity at 1 h (53% vs. 10%), 2 h (52% vs. 17%), and 24 h (71% vs. 34%). Pain-free ratings were greater for the active treatment arm at 1 h (29.2% vs. 16%), 2 h (41.7% vs. 20%), and 24 h (65.2% vs. 40%). The number of subjects with baseline moderate or severe migraine pain who were pain-free at 2 h was significantly greater among active treatment subjects (43% vs. 10.5%). The responder rate was significantly higher among the active treatment group at 1 h (67% vs. 20%), 2 h (66.7% vs. 32%,), and 24 h (78.3% vs. 48%). Overall headache relief was significantly higher in the active treatment group at 1 h (67% vs. 26%) and 2 h (76% vs. 31.6%). Mild adverse events, reported by a minority of subjects, resolved spontaneously. CONCLUSIONS eCOT-NS provides superior clinically meaningful relief and freedom from migraine pain, offering an effective and safe therapy for acute treatment of migraine. TRIAL REGISTRATION ClinicalTrials.gov Identifier NCT03398668.
Collapse
Affiliation(s)
- Oved Daniel
- Headache and Facial Pain Clinic, Ramat-Aviv Medical Center, Tel-Aviv, Israel
| | - Stewart J. Tepper
- Geisel School of Medicine at Dartmouth, Hanover, NH USA ,Dartmouth Headache Center, Department of Neurology, Dartmouth-Hitchcock Medical Center, Lebanon, NH USA
| | - Lisa Deutsch
- BioStats Statistical Consulting, Ltd, Modiin, Israel
| | - Roni Sharon
- Tel-Aviv University Sackler School of Medicine, Tel-Aviv, Israel ,Department of Neurology, Chaim Sheba (Tel HaShomer) Medical Center, Ramat Gan, Israel
| |
Collapse
|
5
|
Abstract
Purpose of Review Neuromodulation devices have become an attractive alternative to traditional pharmacotherapy for migraine, especially for patients intolerant to medication or who prefer non-pharmacological options. In the past decades, many studies demonstrated the efficacy of neuromodulation devices in patients with episodic migraine (EM). However, the benefit of these devices on chronic migraine (CM), which is typically more debilitating and refractory than EM, remains not well studied. Recent Findings We reviewed the literature within the last five years on using FDA-cleared and investigational devices for CM. There were eight randomized controlled trials and 15 open-label observational studies on ten neuromodulation devices. Summary Neuromodulation is promising for use in CM, although efficacy varies among devices or individuals. Noninvasive devices are usually considered safe with minimal adverse events. However, stimulation protocol and methodology differ between studies. More well-designed studies adhering to the guideline may facilitate FDA clearance and better insurance coverage.
Collapse
|
6
|
Peripheral Nerve Stimulation for Treatment of Headaches: An Evidence-Based Review. Biomedicines 2021; 9:biomedicines9111588. [PMID: 34829819 PMCID: PMC8615534 DOI: 10.3390/biomedicines9111588] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/15/2021] [Accepted: 10/26/2021] [Indexed: 01/06/2023] Open
Abstract
Headaches are one of the most common medical complaints worldwide, and treatment is often made difficult because of misclassification. Peripheral nerve stimulation has emerged as a novel treatment for the treatment of intractable headaches in recent years. While high-quality evidence does exist regarding its use, efficacy is generally limited to specific nerves and headache types. While much research remains to bring this technology to the mainstream, clinicians are increasingly able to provide safe yet efficacious pain control.
Collapse
|
7
|
Caiado Vencio R, Raffa PEAZ, Ponce ACC, Malamud BP, Pacheco CC, Franceschini PR, Medeiros RTR, de Aguiar PHP. An unusual case of lead migration in occipital nerve stimulation: A case report and literature review. Surg Neurol Int 2021; 12:189. [PMID: 34084617 PMCID: PMC8168692 DOI: 10.25259/sni_158_2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 04/03/2021] [Indexed: 11/29/2022] Open
Abstract
Background: Lead migration is a complication associated with occipital nerve stimulation (ONS). We present a rare case in which fibrosis in the stress relief loop caused lead migration in the treatment of occipital neuralgia. Case Description: A 30-year-old woman with a 5-year history of refractory occipital neuralgia, who had been under ONS therapy for 2 months, presented with a sudden onset of typical occipital neuralgia pain associated with cervical muscles spasms and myoclonus. A skull radiography showed lead migration. The patient underwent surgery for lead repositioning. During surgery, we identified extensive fibrosis throughout the stress relief loop that produced several constriction points. The fibrosis in the stress relief loop increased tension on the lead during head-and-neck movement, causing progressive migration of the lead. Conclusion: Although lead migration is a common complication of ONS, its association with fibrosis in the stress relief loop has not, to the best of our knowledge, been reported before. Lead migration can directly affect treatment outcome and it is, therefore, important to fully understand the possible mechanisms that can cause it and how to promptly manage them.
Collapse
Affiliation(s)
- Rafael Caiado Vencio
- Department of Medicine, Graduation Medicine, Pontifical Catholic University of Goiás, Goiânia, Goiás, Brazil
| | | | - André Costa Corral Ponce
- Department of Medicine, Graduation Medicine, Faculty of Medicine of ABC, Santo André, São Paulo, Brazil
| | - Bruno Pricoli Malamud
- Department of Medicine, Graduation Medicine, Faculty of Medicine of ABC, Santo André, São Paulo, Brazil
| | | | - Paulo Roberto Franceschini
- Department of Neurology and Neurosurgery, University of Caxias do Sul, Caxias do Sul, Rio Grande do Sul, Brazil
| | | | - Paulo Henrique Pires de Aguiar
- Department of Neurosurgery, Santa Paula Hospital, São Paulo, Brazil.,Department of Neurology, Pontifical Catholic University of São Paulo, Sao Paulo, Brazil, Brazil.,Department of Research and Innovation, Laboratory of Cellular and Molecular Biology, Faculty of Medicine of ABC, Santo André, São Paulo, Brazil
| |
Collapse
|
8
|
Joswig H, Abdallat M, Karapetyan V, MacDougall KW, Cooper PE, Parrent AG. Long-Term Experience with Occipital and Supraorbital Nerve Stimulation for the Various Headache Disorders-A Retrospective Institutional Case Series of 96 Patients. World Neurosurg 2021; 151:e472-e483. [PMID: 33905904 DOI: 10.1016/j.wneu.2021.04.070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 11/27/2022]
Abstract
OBJECTIVE We have provided long-term data on clinically meaningful pain alleviation for drug-refractory headache disorders using occipital (ONS) and supraorbital nerve stimulation (SONS). METHODS We performed a retrospective review of 96 patients with migraine, cervicogenic headache, cluster headache, neuropathic pain of the scalp, tension-type headache, and new daily persistent headache who had undergone ONS (61.5%), SONS (11.5%), or combined ONS plus SONS (27.1%) trial implantation and definitive implantation from 2007 to 2017. Changes in pain perception over time were monitored using the visual analog scale (VAS) for pain. RESULTS The cohort consisted of 60.4% women and 39.6% men, with a mean age of 46.9 ± 11.5 years and pain duration of 14 ± 14.1 years. Of the 96 patients, 65 (67.7%) were treatment responders to a trial (≥30% amelioration in the average or maximum VAS score for pain and/or number of headache days) that had lasted 22.5 ± 8.8 days. The reduction in their average VAS score for pain was to 37% ± 24.4% of baseline compared with 99.1% ± 24.1% of baseline for those without a response (P < 0.01). Of the 56 patients who had undergone implantation and had long-term follow-up data available for ≤10 years, 32 (57.1%) reported a ≥50% reduction in their average VAS score for pain. Four patients (6.5%) had requested hardware explantation. Stage II complications included 1 infection (1.6%) and 6 electrode dislocations (9.7%). The study limitations included the retrospective nature, lack of controls receiving placebo intervention, and randomization. CONCLUSIONS After careful patient selection according to a positive response to a trial of ONS and/or SONS, clinically meaningful long-term benefit was achieved in 57.1% of our patients with various chronic headache conditions.
Collapse
Affiliation(s)
- Holger Joswig
- Department of Neurosurgery, HMU Health and Medical University Potsdam, Ernst von Bergmann Hospital, Potsdam, Germany.
| | | | - Vahagn Karapetyan
- Division of Neurosurgery, Department of Clinical Neurological Sciences, London Health Sciences Centre, University Hospital, London, Ontario, Canada
| | - Keith W MacDougall
- Division of Neurosurgery, Department of Clinical Neurological Sciences, London Health Sciences Centre, University Hospital, London, Ontario, Canada
| | - Paul E Cooper
- Division of Neurology, Department of Clinical Neurological Sciences, London Health Sciences Centre, University Hospital, London, Ontario, Canada
| | - Andrew G Parrent
- Division of Neurosurgery, Department of Clinical Neurological Sciences, London Health Sciences Centre, University Hospital, London, Ontario, Canada
| |
Collapse
|
9
|
Effect of Occipital Nerve Stimulation (ONS) on the Orbicularis Oculi Reflex Triggered by a Standardized Air Flow in Patients with Chronic Migraine-A Prospective, Randomized, Interventional Study. Pain Ther 2021; 10:567-576. [PMID: 33630252 PMCID: PMC8119542 DOI: 10.1007/s40122-021-00242-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 02/04/2021] [Indexed: 11/29/2022] Open
Abstract
Introduction Occipital nerve stimulation (ONS) is a specific form of peripheral neuromodulation used in the treatment of chronic pain disorders. A particular field of application is in the therapy of treatment-refractory headaches, especially of chronic migraine. The precise mode of action is unknown. It is presumed that central and peripheral sensitization are reduced in patients with chronic headache. The aim of this study was to examine the effect of ONS on pain-modulatory mechanisms in the trigeminocervical area in patients with chronic migraine. Methods In a balanced repeated measurements design in eight patients with chronic migraine with and without active ONS, we analyzed which effects ONS had on the orbicularis oculi reflex dynamically elicited by corneal air flow. Results The orbicularis oculi reflex in active ONS (7.38 ± 20.14 eyelid closures/minute) compared to inactive ONS (18.73 ± 14.30 eyelid closures/minute) is significantly reduced (p = 0.021). Conclusions The results show that under active ONS compared to inactive ONS in patients with chronic migraine, the orbicularis oculi reflex, dynamically triggered by a standardized air flow, is significantly reduced. This suggests that ONS is able to directly counteract the trigeminally mediated central sensitization in chronic migraine and protectively reduce the effects of aversive peripheral stimulation.
Collapse
|
10
|
Mapping Assessments Instruments for Headache Disorders against the ICF Biopsychosocial Model of Health and Disability. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 18:ijerph18010246. [PMID: 33396262 PMCID: PMC7795912 DOI: 10.3390/ijerph18010246] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/23/2020] [Accepted: 12/24/2020] [Indexed: 12/12/2022]
Abstract
Headache disorders have a strong impact on sufferers’ lives. However, the “content” of assessment instruments addressing concepts, such as disability and quality of life (QoL), has not comprehensively been addressed. We searched SCOPUS for research papers in which outcome measures were used in adult populations of patients with migraine, tension-type headache (TTH), and cluster headache (CH). The content of single instruments was then mapped against the International Classification of Functioning, Disability, and Health. A total of 150 papers and 26 instruments were included: 15 addressed disability or impact, two addressed work-related difficulties, and nine addressed QoL. Few instruments were commonly used across the conditions and covered domains of functioning were impact on daily life activities, homework, school, and work-related tasks, leisure time, informal and family relations, pain, emotional difficulties, energy level, and impulse control. Most of the research is based on instruments that were developed for migraine, which is critical for CH, and the impact of headache disorders on work-related activities is poorly acknowledged. Further research is needed to expand the scope of headaches impact on daily life activities, and on environmental factors relevant to headache disorders to raise knowledge on the less represented areas, e.g., TTH impact.
Collapse
|
11
|
Occipital Nerve Stimulation in Chronic Migraine: The Relationship Between Perceived Sensory Quality, Perceived Sensory Location, and Clinical Efficacy-A Prospective, Observational, Non-Interventional Study. Pain Ther 2020; 9:615-626. [PMID: 32910427 PMCID: PMC7648789 DOI: 10.1007/s40122-020-00194-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Indexed: 11/13/2022] Open
Abstract
Introduction Occipital nerve stimulation (ONS) is used to treat therapy-resistant chronic migraine. Clinical use has resulted in a wide intraindividual and interindividual variation of clinical efficacy. The aim of this study was to analyze a potential relationship between sociodemographic variables, headache parameters, perceived sensory quality, perceived sensory location, as well as clinical efficacy. Methods Thirty-two subjects (21.9% male, mean age 45.77 years) suffering from chronic migraine refractory to other treatment and therefore treated with ONS were included in this study. We used a computer-based imaging method for mapping the ONS-induced perceived sensory location, the perceived spatial sensory field size, as well as the perceived sensory quality in a long-term course over 21 months in weekly time intervals. Additionally, the effect of ONS on the migraine headache was documented weekly by the participants using a verbal rating scale. Over the observation period, a total of 808 individual weekly data sets were recorded and a potential relationship between ONS-induced perceptions and headache parameters could be analyzed. Results We found that 48.9% of stimulation intervals were reported as effective by patients. Women displayed a significantly higher responder rate than men. The reported effectiveness did not differ depending on age, the average number of migraine days per month, the MIDAS score, or the duration of the migraine disorder prior to ONS treatment. Implantation with trial period led to significantly lower responder rates than without the trial period. The most frequently perceived sensory quality of “tingling” was found significantly more frequently in non-responders than in responders. Responders displayed significantly lower pleasantness scores for their reported perceptions than non-responders. Sensations that were spatially perceived above the line connecting the external acoustic meati with the external occipital protuberance (MOP line) led to patients reporting a positive clinical effect significantly more frequently than sensations spatially perceived below the MOP line. Spatially small fields of sensory perception were correlated with a higher responder rate than those covering broader areas. Conclusions The ONS-induced sensory location, the size of the spatial sensory field, as well as the sensory quality are significantly correlated with the reported clinical effectiveness. The results suggest that besides surgical technique, the individual and continuous programming of the stimulation parameters is clinically relevant in increasing the therapeutic effectiveness.
Collapse
|