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Effects of treadmill exercise on transcranial magnetic stimulation-induced excitability to quadriceps after stroke
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FORRESTER L; HANLEY DF; MACKO R
ARCH PHYS MED REHABIL , 2006, vol. 87, n° 2, p. 229-234 Doc n°: 123872 Localisation : Documentation IRR Descripteurs : AF21 - ACCIDENTS VASCULAIRES CEREBRAUX, AL1 - STIMULATION MAGNETIQUE TRANSCRANIENNE Url : http://
Article consultable sur : http://www.archives-pmr.org
Objective: To determine characteristics of transcranial magnetic stimulation (TMS)-induced measures of central motor excitability to the paretic and nonparetic quadriceps muscles of chronic hemiparetic stroke patients in the context of a short-term, submaximal bout treadmill exercise. Design: Cross-sectional. Setting: Motor control and gait biomechanics laboratory. Participants: Convenience sample of 11 patients including cohorts of treadmill untrained (n=8) and trained (n=3) stroke patients with chronic hemiparetic gait. Intervention: Short-term submaximal treadmill exercise. Main Outcome Measures: Thresholds, amplitudes and latencies of TMS-induced motor evoked potentials at vastus medialis in paretic and nonparetic lower extremities. Results: Baseline characteristics of the motor evoked potentials (MEPs) show significantly higher motor thresholds, longer latencies, and reduced amplitudes on the paretic side. In cross-sectional comparisons a group of treadmill-trained patients had greater paretic MEP amplitude changes after treadmill exercise versus paretic MEP responses from a group of untrained patients. Conclusions: These results indicate that treadmill training for 3 months or more may alter responsiveness of the lower-extremity central motor pathways to a short-term treadmill stimulus. Langue : ANGLAIS |
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