Chaddock-Reflex

The Chaddock reflex is a foreign reflex from the group of pyramidal tract signs that indicate in adults of harm to the central motor neurons. A positive reflex is present when the wiping the outer ( lateral ) dorsum of the foot there is a tonic dorsiflexion of the big toe and often a spreading of the other toes. To prevent refugee movements in sensitive individuals, the Chaddock reflex can be applied instead of the Babinski reflex.

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

The reflex was described in 1911 by Charles G. Chaddock as "external malleolar sign" and later named after him. Chaddock referred to the reduced misinterpretation of his test, as this will in contrast to the Babinski distorted less by Wegziehbewegungen. An earlier description of the reflex was performed in 1906 by the Japanese K. Yoshimura.