16-12-2015
Biology

contestada

why doesnt the patellar reflex happen your leg is straight

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MonikaMole1421 MonikaMole1421

16-12-2015

The patellar reflex or knee(j)erk reflex doesn't happen when your leg is straight because the tendon is relaxed. In order for the reflex to be elicited, the tendon must be flexed or stretched.

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