American Heritage® Dictionary of the English Language, Fourth Edition
- n. An extension of the great toe, sometimes with fanning of the other toes, in response to stroking of the sole of the foot. It is a normal reflex in infants, but it is usually associated with a disturbance of the pyramidal tract in children and adults. Also called Babinski sign, Babinski's sign.
- n. medicine An abnormal plantar reflex in which the hallux moves upwards, indicative of motor neuron damage.
- n. extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of two years but a sign of brain or spinal cord injury in older persons
- After Joseph Babinski (1857–1932), French neurologist. (Wiktionary)
- After Joseph François Felix Babinski (1857-1932), French neurologist. (American Heritage® Dictionary of the English Language, Fourth Edition)
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