cogwheel rigidity

cogwheel rigidity
rigidity of a muscle that gives way in a series of little jerks upon being passively stretched, analogous to the ratcheting movement when a spring-loaded rod drops into the successive notches of a cog. Called also cogwheel phenomenon or sign and Negro phenomenon or sign.

Medical dictionary. 2011.

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  • cogwheel phenomenon — see under rigidity …   Medical dictionary

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  • Negro phenomenon — cogwheel rigidity …   Medical dictionary

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  • РИГИДНОСТЬ — (rigidity) (в неврологии) сопротивление выполнению пассивных движений конечностью. Чаще всего ригидность является одним из симптомов паркинсонизма. Сопротивление гладких мышц называется пластической ригидностью (plastic или lead pipe rigidity);… …   Толковый словарь по медицине

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