COMPARISON OF THE MAGNETICALLY MAPPED CORTICOMOTOR REPRESENTATION OF A MUSCLE AT REST AND DURING LOW-LEVEL VOLUNTARY CONTRACTION

被引：45

作者：

WILSON, SA

THICKBROOM, GW

MASTAGLIA, FL

机构：

[1] QUEEN ELIZABETH II MED CTR,AUSTRALIAN NEUROMUSCULAR RES INST,PERTH,WA 6009,AUSTRALIA

[2] UNIV WESTERN AUSTRALIA,QUEEN ELIZABETH II MED CTR,DEPT MED,NEDLANDS,WA 6009,AUSTRALIA

来源：

ELECTROMYOGRAPHY AND MOTOR CONTROL-ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1995年 / 97卷 / 05期

关键词：

RELAXED; CONTRACTED; CORTICAL MAPPING; MAGNETIC STIMULATION;

D O I：

10.1016/0924-980X(95)80001-8

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

This study has compared the topography of the corticomotor representation of an intrinsic hand muscle in the relaxed state and during a low-level voluntary contraction using transcranial magnetic stimulation. II was found that the optimum cortical stimulus site and the surrounding area of excitable cortex were shifted similar to 6 mm medially as a result of performing a voluntary contraction. This difference may be due to a combination of factors involving the spatial distribution of excitable intracortical fibres, the effects of muscle afferent activity on motor cortex excitability, and task-dependent modifications of corticomotor output.

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页码：246 / 250

页数：5

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