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Babinski reflex

Ba·bin·ski re·flex [ bə bìnskee rfleks ] or Ba·bin·ski's re·flex [ bə bìnskeez rfleks ]


noun 
Definition:
 
physiological response to foot stroking: a curling upward of the big toe when the sole of the foot is stroked. It is a normal reflex in children up to two years old but an indicator of disease of the brain or spinal cord in older people.

[Early 20th century. After J. F. F. Babinski (1857-1932), French neurologist]
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