Incomplete Spinal Cord Injury Clinical Trial
Official title:
Transcutaneous Spinal Direct Current Stimulation to Enhance Locomotion After Spinal Cord Injury
This study will investigate the effects of transcutaneous direct current stimulation (tsDCS) on walking function in individuals with incomplete spinal cord injury. Following rehabilitation, individuals with ISCI often demonstrate improved walking function, but continue to have serious impairments that limit mobility, community participation and quality of life. Adjuvants to rehabilitation that increase spinal excitation during training may enhance its effectiveness. tsDCS is a non-invasive neuromodulation approach that uses a mild electrical current, applied over the skin of the low back, to alter the membrane potential of spinal neurons. tsDCS will be applied during locomotor training, a well-established rehabilitation strategy that promotes walking recovery. Locomotor training emphasizes repetitive and task-specific practice of coordinated walking, often with therapist assistance or cueing to promote high quality movement patterns. The study team will explore if tsDCS combined with locomotor training increases spinal excitation and thereby improves the effectiveness of walking rehabilitation.
The purpose of this study is to investigate the effects of transcutaneous direct current stimulation (tsDCS) on locomotor function and rehabilitation outcomes in individuals with incomplete spinal cord injury (ISCI). tsDCS is a mild, non-invasive form of electrical stimulation that can alter spinal cord excitability. Specific Aim 1 (Cross-sectional): To test the hypothesis that tsDCS applied during walking will improve motor activation in adults with chronic ISCI. A random order, double blind cross-over study will be conducted across two test sessions to compare the immediate effects of two dosages of tsDCS during walking. To assess motor activation, the primary outcome measure will be lower extremity surface electromyography. Specific Aim 2 (Interventional): To test the hypothesis that tsDCS applied during 16 sessions of locomotor training will improve functional walking outcomes. Participants will be randomized to receive 16 sessions of locomotor training with one of the two tsDCS dosages. The primary outcome is walking function as measured by standardized clinical tests of walking speed and endurance. To address the aims of the study, the investigators will use a two-part study design. Following phone and in-person screenings and physician approval, individuals will provide informed consent to the study procedures. In the first part, participants will complete two separate testing sessions, presented in random order, that involve up to 30 minutes of tsDCS at one of two dosages levels while walking. The researchers will assess changes in motor activation before and at the end of the period of walking. For the second part, participants will be randomized to receive 16 sessions of locomotor training with one of the two dosages of tsDCS. Before and after the 16-session intervention (i.e., at baseline and post intervention), the study team will assess functional outcomes through standardized tests of walking speed and endurance. ;
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