Chaddock reflex

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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]


  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.