Lesions in supplementary motor area interfere with a monkey's performance of a bimanual coordination task
Abstract
Unilateral lesions of the supplementary motor area (SMA) produce a deficit in bimanual coordination which is long-lasting. Both hands tend to be used in an identical manner instead of sharing the work load between them. This finding seems to be consistent with a role of SMA in the programming of movement through instruction of the primary motor area.
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Neuroscience Letters