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==Overview== | |||
'''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 stretch. | '''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 stretch. | ||
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==References== | ==References== | ||
* ''The Principles of Physiology'' Jensen, David Ph.D.,Appleton-Century-Crofts, New York.1976 | * ''The Principles of Physiology'' Jensen, David Ph.D.,Appleton-Century-Crofts, New York.1976 | ||
[[Category:Neurology]] | [[Category:Neurology]] | ||
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Latest revision as of 17:28, 20 August 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
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 stretch.
Associated conditions
Westphal's sign has a clinical significance used in determining neurodisorders or diseases such as:
- neuro-syphilis tabes dorsalis
- 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
However, Westphal's sign is often known as a characteristic finding in tabes dorsalis, a type of neuro-syphilis.
See also
References
- The Principles of Physiology Jensen, David Ph.D.,Appleton-Century-Crofts, New York.1976