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Definition of Knee jerk
1. Noun. A reflex extension of the leg resulting from a sharp tap on the patellar tendon.
Exact synonyms: Knee-jerk Reflex, Patellar Reflex
Generic synonyms: Inborn Reflex, Innate Reflex, Instinctive Reflex, Physiological Reaction, Reflex, Reflex Action, Reflex Response, Unconditioned Reflex
Generic synonyms: Inborn Reflex, Innate Reflex, Instinctive Reflex, Physiological Reaction, Reflex, Reflex Action, Reflex Response, Unconditioned Reflex
Medical Definition of Knee jerk
1. The reflex tested by tapping just below the bent knee on the patellar tendon to cause the quadriceps muscle to contract and bring the lower leg forward. It has given rise to the saying: a knee-jerk reaction. Also known medically as the patellar reflex. (12 Dec 1998)
Lexicographical Neighbors of Knee Jerk
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