- A dictionary of medical eponyms

Throckmorton's reflex

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A variant of Babinski's reflex. Extension of great toe and flexion of others on percussion over the metatarso-phalangeal joint medial to the extensor hallucis longus. Seen in pyramidal tract lesions.

There are also references to a Throckmorton's sign used by radiologists. We have little information about this. Can you help?


  • T. B. Throckmorton:
    A new method for eliciting the extensor toe reflex.
    Journal of the American Medical Association, Chicago, 1911, 56: 1311. The role of extensor toe reflex in neurological diagnosis.
    New York Medical Journal, 1911, 94: 786-787. Differential diagnosis of functional and organic diseases of the nervous system.
    Journal of the Iowa Medical Society, 1926, 16: 1.
    Colorado Medicine, Denver, 1926, 23: 54.

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