Chaddock reflex

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Triggering of the Chaddock reflex, representation from a description by Chales G. Chaddock, 1912.

The Chaddock reflex is a foreign reflex from the group of pyramidal tract signs , which indicate damage to central motor neurons in adults . A positive reflex is present when, when brushing the outer ( lateral ) back of the foot, a tonic dorsiflexion of the big toe and often a spreading of the other toes occurs. In order to avoid escape movements in sensitive people, the Chaddock reflex can be used instead of the Babinski reflex .

There are only a few data on the sensitivity and specificity of the Chaddock reflex.

The reflex was described by Charles G. Chaddock in 1911 as the “external malleolar sign” and later named after him. Chaddock referred to the reduced misinterpretation of his test, since, in contrast to the Babinski reflex, it is less falsified by pulling away movements. An earlier description of the reflex occurred in 1906 by the Japanese K. Yoshimura.

Individual evidence

  1. ↑ Malte E. Kornhuber, Stefan Zierz: The neurological examination. Steinkopff Verlag, Darmstadt 2005, ISBN 3-7985-1444-5 , p. 86.
  2. ↑ Holger Grehl, Frank Reinhardt: Checklist neurology. Thieme, Stuttgart 2005, ISBN 3131262737 , p. 16.
  3. ^ K. Tashiro: Clinical studies on chaddock reflex. In: Hokkaido igaku zasshi - The Hokkaido journal of medical science. Volume 57, Number 6, November 1982, pp. 741-751, ISSN  0367-6102 . PMID 6985142 .
  4. ^ Charles G. Chaddock: The external malleolar sign. In: Interstate Medical Journal. 1911, pp. 1026-1038. ( Digitized version )
  5. ↑ a b Christopher G. Goetz: History of the extensor plantar response: Babinski and Chaddock signs. In: Seminars in neurology. Volume 22, Number 4, December 2002, pp. 391-398, ISSN  0271-8235 . doi : 10.1055 / s-2002-36761 . PMID 12539060 , p. 395ff.