jerk

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jerk

 [jerk]
a sudden reflex or involuntary movement.
Achilles jerk (ankle jerk) plantar extension of the foot elicited by a tap on the achilles tendon, while the patient is seated on a bed or chair, with feet hanging freely; called also Achilles reflex and triceps surae jerk or reflex.
biceps jerk biceps reflex.
elbow jerk involuntary flexion of the elbow on striking the tendon of the biceps or triceps muscle.
jaw jerk jaw-jerk reflex.
knee jerk see knee jerk.
tendon jerk tendon reflex.
triceps surae jerk ankle jerk.

jerk

(jerk),
1. A sudden pull.
2. Synonym(s): deep reflex

jerk

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

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.

jerk

(jĕrk)
1. A sudden pull.
2. Synonym(s): deep reflex.

jerk

1. A sudden involuntary movement, usually of the head or a limb.
2. A reflex muscle or muscle group contraction in response to a sudden stretching by briskly tapping the tendon. A tendon reflex.

jerk

(jĕrk)
A sudden pull.

jerk

a sudden reflex or involuntary movement.

ankle jerk
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.