jerk

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Related to jerk around: out of commission

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

(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.
References in periodicals archive ?
Talking about the reunion, she admitted: "I want to recapture my youth, jerk around in front of thousands of people and make lots and lots of money."
One attorney, who requested anonymity, expressed concern for his clients because he felt a lien holder would foreclose on the property much faster than the city, which, he said, he could "jerk around" for three or four years.
The camera then appears to jerk around as Mr Aizlewood allegedly tries to wrestle it from the cameraman.