Barre's sign

Bar·ré's sign

An indication of disease of the corticospinal tracts in which an individual, when placed in a prone position with the legs flexed at the knees, is unable to maintain a flexed position on the side of the lesion but can extend the leg.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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