Article · Wikipedia archive · Last revised Jun 25, 2026

Chaddock reflex

The Chaddock reflex is a diagnostic reflex similar to the Babinski reflex. Chaddock's sign is present when stroking of the lateral malleolus causes extension of the great toe, indicating damage to the corticospinal tract.

Last revised
Jun 25, 2026
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Chaddock reflex
Demonstration of the Chaddock reflex in an early publication by Charles G. Chaddock
Differential diagnosiscorticospinal tract damage

The Chaddock reflex is a diagnostic reflex similar to the Babinski reflex. Chaddock's sign is present when stroking of the lateral malleolus causes extension of the great toe, indicating damage to the corticospinal tract.1

It was identified by Charles Gilbert Chaddock in 1911.2

References

References

  1. "Thefreedictionary". Retrieved 24 May 2017.
  2. Goetz CG (2002). "History of the extensor plantar response: Babinski and Chaddock signs". Seminars in Neurology. 22 (4): 391–8. doi:10.1055/s-2002-36761. PMID 12539060. S2CID 41756108.