jerk (redirected from Third temporal derivative of displacement)

jerk (jurk) a sudden reflex or involuntary movement.jer´ky

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Achilles jerk , ankle jerk triceps surae reflex.

biceps jerk  see under reflex.

elbow jerk  triceps reflex.

jaw jerk  see under reflex.

knee jerk , quadriceps jerk patellar reflex.

tendon jerk  see under reflex.

triceps surae jerk  see under reflex.

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jerk (jûrk)

v.

To make spasmodic motions.

n.

1. A sudden reflexive or spasmodic muscular movement. See deep reflex.

2. jerks Involuntary convulsive twitching often resulting from excitement. Often used with the.

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jerk,

1 a sudden abrupt motion such as a thrust, yank, push, or pull.

2 a quick muscular contraction induced when a tendon over a bone is tapped. See also spasm.

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jerk

a sudden reflex or involuntary movement.

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ankle jerk

see gastrocnemius reflex.

biceps jerk

called also elbow jerk; see biceps reflex.

elbow jerk

see biceps jerk (above).

jerk nystagmus

see vestibular nystagmus.

patellar jerk

see patellar reflex.

tendon jerk

see tendon reflex.