Babinski's sign

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Related to Babinskis sign: Babinski reflex

Babinski's sign

Etymology: Joseph Babinski
a series of partial responses that are pathognomonic of different degrees of upper motor neuron disease, including (1) absence of an ankle jerk in sciatica; (2) an extensor plantar response, with an extension of the great toe and adduction of the other toes; (3) a more pronounced concentration of platysma on the unaffected side during blowing or whistling; (4) pronation that occurs when an arm affected by paralysis is placed in supination; and (5) when a patient in a supine position with arms crossed over the chest attempts to assume a sitting position, the thigh on the affected side is flexed, and the heel is raised, while the leg on the unaffected side remains flat.

Babinski's sign

An 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).