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Comparison of the magnetically mapped corticomotor representation of a muscle at rest and during low-level voluntary contraction

Wilson, S.A., Thickbroom, G.W. and Mastaglia, F.L. (1995) Comparison of the magnetically mapped corticomotor representation of a muscle at rest and during low-level voluntary contraction. Electroencephalography and Clinical Neurophysiology/Electromyography and Motor Control, 97 (5). pp. 246-250.

Link to Published Version: http://dx.doi.org/10.1016/0924-980X(95)80001-8
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Abstract

This study has compared the topography of the corticomotor representation of an instrinsic hand muscle in the relaxed state and during a low-level voluntary contraction using transcranial magnetic stimulation. It was found that the optimum cortical stimulus site and the surrounding area of excitable cortex were shifted ∼ 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.

Publication Type: Journal Article
Publisher: Elsevier
Copyright: © 1995 Published by Elsevier Ireland Ltd.
URI: http://researchrepository.murdoch.edu.au/id/eprint/24143
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