| Facilitation of Nerve Conduction by Distant Muscle Contraction in Stroke Patients. |
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Sohn, Min Kyun , Han, Sang Min |
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Department of Rehabilitation Medicine, Chungnam National University College of Medicine, Korea. rm53hsm@hanmail.net |
| 뇌졸중 환자에서 원거리 근 수축에 의한 신경전도의 촉통 |
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손민균, 한상민 |
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충남대학교 의과대학 재활의학교실 |
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| Abstract |
Objective
To investigate the effect of distant muscle contraction on the sensory and motor nerve conduction and F-wave studies in stroke patients.
Method
During isometric contraction of contralateral hand, sensory nerve action potential (SNAP), compound muscle action potential (CMAP) and F-wave of median nerve were recorded at submaximal and supramaximal stimulus intensity. The subject group consisted of 15 stroke patients and 10 control subjects.
Results
At submaximal stimulation, the amplitude and area of SNAP were significantly increased during muscle contraction in both groups (p＜0.05). However there were no changes in parameters of SNAP and CMAP at supramaximal stimulation in both groups. The latency of F-wave was prolonged, and the amplitude was increased in the stroke group than those in the control group at resting state (p＜0.05). The shortening of F-wave latency and increment of F-wave amplitude were observed in the control group during distant muscle contraction, but not in the stroke group.
Conclusion
The distant muscle contraction might facilitate the nerve conduction. In addition F-wave elicited during voluntary contraction can be used as a monitor of upper motor neuron disorders. (J Korean Acad Rehab Med 2005; 29: 50-57) |
| Key Words:
Distant muscle contraction, Nerve conduction studies, Stroke, Facilitation |
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