Facilitation of Nerve Conduction by Distant Muscle Contraction in Stroke Patients.
- Author:
Min Kyun SOHN
1
;
Sang Min HAN
Author Information
1. Department of Rehabilitation Medicine, Chungnam National University College of Medicine, Korea. rm53hsm@hanmail.net
- Publication Type:Original Article
- Keywords:
Distant muscle contraction;
Nerve conduction studies;
Stroke;
Facilitation
- MeSH:
Action Potentials;
Hand;
Humans;
Isometric Contraction;
Median Nerve;
Motor Neurons;
Muscle Contraction*;
Neural Conduction*;
Stroke*
- From:Journal of the Korean Academy of Rehabilitation Medicine
2005;29(1):50-57
- CountryRepublic of Korea
- Language:Korean
-
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.
