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jerk
(redirected from tendon jerk)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
jerk [jərk]
(mechanics)
The rate of change of acceleration; it is the third derivative of position with respect to time.
A unit of rate of change of acceleration, equal to 1 foot (30.48 centimeters) per second squared per second.


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Spasticity is defined as the velocity-dependent increase in muscle tone, with associated tendon jerks that result from the hyperexcitability of the stretch reflex.
There are a multitude of reflex circuits, such as the tendon jerk reflex: tapping the knee with a hammer makes the leg straighten.
 
 
 
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