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Babinski signA reflex movement of the big toe upward instead of downward when the plantar aspect of the foot is stroked, a manoeuvre used to test injury to, or diseases of, the upper motor neurons.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
Babinski's signAn extension and fanning out of the toes when the sole of the foot is stroked firmly with a pointed object. This reaction, instead of the normal curling up of the toes, indicates damage to the motor system above the level of the spinal nerves and is common in STROKE. (Joseph François Babinski, 1857–1932, French neurologist).
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005