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Westphal's sign

Westphal's sign is the clinical correlate of the absence or decrease of patellar reflex or knee jerk. Patellar reflex or knee jerk is a kind of deep or stretch reflex where an application of a stimulus to the patellar tendon such as strike by a solid object or hammer caused the leg to extend due to such stimulus causes the quadriceps femoris muscle to contract.

Associated conditions
Westphal's sign has a clinical significance used in determining neurological disorders or diseases such as: • receptor damage, peripheral nerve disease, involving the dorsal (sensory) columns of the spinal cord and cerebellar lesions • lesions present within the motor cortex of the brain or the pyramidal tracts which it combined with muscular spasms • complete interruption of sensory and/or motor impulse transmission in the femoral nerve ==References==
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