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jerk |
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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Researchers and clinicians have frequently described some of these symptoms as components of spasticity, defined as "a motor disorder characterized by a velocity-dependent increase in tonic stretch reflexes with exaggerated tendon jerks, resulting from hyperexcitability of the stretch reflex. Studies of the H-reflex and the tendon jerk reflex in healthy newborn infants have demonstrated differences between healthy neonates and healthy adults. |
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