Non-invasive neuromodulation to improve gait in chronic multiple sclerosis: a randomized double blind controlled pilot trial

• Published in: Journal of neuroengineering and rehabilitation Vol. 11; no. 1; p. 79
• Main Authors: Tyler, Mitchell E, Kaczmarek, Kurt A, Rust, Kathy L, Subbotin, Alla M, Skinner, Kimberly L, Danilov, Yuri P
• Format: Journal Article
• Language: English
• Published: London BioMed Central 01.05.2014; BioMed Central Ltd
• Subjects: Biomedical and Life Sciences; Biomedical engineering; Biomedical Engineering and Bioengineering; Biomedicine; Double-Blind Method; Electric Stimulation Therapy - methods; Electrical equipment and supplies; Electrical machinery; Electrodes; Exercise; Exercise Therapy - methods; Female; Gait - physiology; Gait Disorders, Neurologic - etiology; Gait Disorders, Neurologic - rehabilitation; Human subjects; Humans; Intervention; Inventors; Male; Medical equipment; Middle Aged; Multiple sclerosis; Multiple Sclerosis - complications; Multiple Sclerosis - rehabilitation; Neurology; Neurosciences; People with disabilities; Physical fitness; Physical therapy; Physiological aspects; Pilot Projects; Rehabilitation; Rehabilitation Medicine; Studies; Therapeutics, Physiological; Therapy; Tongue - physiology; Variance analysis; Walking; Multiple sclerosis; Tongue; Gait; Non-invasive; Neurostimulation; Electrical stimulation; Neuromodulation; Balance
• ISSN: 1743-0003; 1743-0003
• DOI: 10.1186/1743-0003-11-79

Background This study sought to examine the effect of targeted physical therapy with and without cranial nerve non-invasive neuromodulation (CN-NINM), on the walking ability of people with MS who exhibited a dysfunctional gait. We hypothesized that subjects who received electrical stimulation would have greater improvement than those who had a control device after a 14-week intervention. Gait disturbance is a common problem for people with multiple sclerosis (MS). Current management may include exercise, pharmacology, functional electrical stimulation, compensatory strategies, use of assistive devices, and implanted electrical devices. We have developed an effective rehabilitative strategy using neuromodulation of the cranial nerves via electrical stimulation of the tongue to enhance the plasticity of the brain. Methods The study is a within-subject blinded randomized control design. Twenty chronic MS subjects with an identified gait disturbance were assigned to either an active or control group. Both groups completed a 14-week intervention program using a standardized combination of exercise and a device that provided electrical stimulation to the tongue. Those in the active group received electrical stimulation on the tongue that they could perceive. Those in the control group used a device that did not provide a physiologically significant stimulus and was not perceivable. Subjects were assessed with the Dynamic Gait Index (DGI). Results The DGI scores improved for both groups. There were significant between-group differences, with the active group showing statistically greater improvement than the control group mean. Conclusion People with MS demonstrated improved gait with CN-NINM training in a pilot randomized controlled trial. This study suggests that tongue-based neurostimulation may amplify the benefits of exercise for improving gait in people with chronic MS.