Chaddock reflex
Chaddock Reflex
Chaddock reflex (pronounced: CHAD-ock ree-flex) is a clinical sign used in neurology to test for damage or disease in the central nervous system. It is named after the British neurologist, Charles Gilbert Chaddock, who first described it in 1911.
Etymology
The term "Chaddock reflex" is derived from the name of its discoverer, Charles Gilbert Chaddock. The word "reflex" comes from the Latin reflexus, meaning "bent back", which refers to the involuntary and automatic nature of the response.
Description
The Chaddock reflex is elicited by stroking the lateral malleolus (the bony prominence on the outside of the ankle) towards the little toe. A positive response is indicated by an involuntary flexion (bending) of the big toe, similar to the Babinski sign. This reflex is considered pathological and is typically present in conditions where the pyramidal tract is damaged, such as stroke, multiple sclerosis, or spinal cord injury.
Related Terms
- Babinski sign: A similar reflex test used in neurology, named after the French neurologist Joseph Babinski.
- Hoffmann's sign: Another neurological reflex test, used to detect dysfunction in the corticospinal tract.
- Pyramidal tract: A major pathway in the central nervous system that carries motor commands from the brain to the spinal cord and then to the muscles.
- Central nervous system: The part of the nervous system consisting of the brain and spinal cord.
See Also
External links
- Medical encyclopedia article on Chaddock reflex
- Wikipedia's article - Chaddock reflex
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