PURPOSE/HYPOTHESIS: Purpose of the study was threefold. First, to determine in a preliminary, small randomized parallel group study, whether Constraint Induced Movement Therapy (CIMT) in acute stroke was feasible, safe, and caused beneficial changes in motor function. Second, to determine the feasibility of using transcranial magnetic stimulation (TMS) to assess motor cortical reorganization in acute stroke. Third, to determine whether the cortical reorganization of movement control as measured with TMS correlates with improved motor function. Based on positive results from this study, a larger scale study is now in progress. NUMBER OF SUBJECTS: 8 subjects were enrolled and randomizied in this preliminary study within 14 days of their stroke. Enrollment was based on the following exclusion criteria: less than 10 degrees of movement, as defined by scoring >3 on the Arm Motor Function (AMF) of the National Institutes of Health Stroke Scale (NIHSS), aphasia, prior stroke, too good movement as defined by scoring NIHSS AMF=0, confusion, pacemaker, Spanish speaking only, medical complications. MATERIALS/METHODS: CIMT group was restrained by wearing a soft mitten on the uninvoled hand for a target of 90% of waking hours over 14 days. CIMT treatment was modeled from Dr. Edward Taub's laboratory at the University of Alabama at Birmingham. CIMT included shaping tasks, which enabled patients to achieve success with their involved hand in order to suppress patterns of learned-nonuse. The control group received “traditional” rehab with the use of both hands. Treatment sessions included active and/or active-assistive range of motion, bimanual and unilateral activities. “Traditional” rehab also included tone modification and functional activities of daily living; modified or compensatory methods. CIMT and control treatment frequency was approximately 3 hours/day, 6 days/week over a 14 day period. TMS was used to map the cortical reorganization of the motor cortex pre & post treatment and again at a 3 month follow-up. Performance measures included: Grooved Pegboard Test (GPT), Fugl-Meyer (FM), and Motor Activiy Log (MAL). Performance measures were also measured pre & post treatment, and again at a 3 month follow-up. RESULTS: Motor performance of the involved hand improved in most patients in both treatment groups. However, the most significant differences between the 2 patient groups, noted both at post treatment and again at the 3 month follow-up, was the cortical reorganization that occurred in the lesioned hemisphere, as measured by TMS. Performance measures were significantly improved in the involved hand, as measured by the GPT and the FM. CONCLUSIONS: Preliminary results suggest that there is a strong relationship between cortical output maps for movement as determined by TMS and motor dexterity in the corresponding hand. CIMT in the acute stroke patient is safe and induces more cortical reorganization and recovery as compared to traditional therapy. CLINICAL RELEVANCE: CIMT is a safe intervention and induces cortical plasticity in acute stroke patients.
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