Definitions for: Knee Jerk

[n] a reflex extension of the leg resulting from a sharp tap on the patellar tendon

Webster (1913) Definition: Knee jerk (Physiol.)
A jerk or kick produced by a blow or sudden strain upon the
patellar tendon of the knee, which causes a sudden
contraction of the quadriceps muscle.

Synonyms: knee-jerk reflex, patellar reflex

See Also: inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, unconditioned reflex

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