Chaddock sign


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Chad·dock sign

(chad'ok),
when the lateral malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths.
Synonym(s): Chaddock reflex

Chaddock sign

or

Chaddock reflex

(chăd′ək)
n.
Extension of the big toe in response to irritation of the skin covering the malleolus of the ankle joint, observed in organic disease of the corticospinal reflex paths.

Chaddock sign

Neurology Great toe extension by stroking the skin over the external malleolus, an indicator of corticospinal tract lesions–eg, MS. Cf Babinski sign.

chad·dock sign

, Chaddock reflex (chad'ŏk sīn, rē'fleks)
When the external malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths.

Chaddock,

Charles G., U.S. neurologist, 1861-1936.
Chaddock reflex - Synonym(s): Chaddock sign
Chaddock sign - when the external malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths. Synonym(s): Chaddock reflex; external malleolar sign