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You cannot have completed your training as a neurologist unless you can make the plantar response go up or down. Or so the apocryphal story goes.
Of all the neurologists who have found fame, at least such that they continue to be commemorated by acolytes worldwide and on a daily basis, Joseph Babinski (1857–1932) must be considered to have the greatest, at times most dramatic influence, and indeed sustained impact on clinical neurology. Yet are we really serious about questioning the veracity of this eponymous response and any clinical implications?
Run a car key (figure 1; or as some have suggested, a most expensive motor car key, ie, ‘moat–aah-cah keeee’, ideally pronounced in the lowest possible timbre) along the lateral border of the sole. A normal response invokes flexion of the great toe. Conversely, an upgoing toe is generally attributed to a lesion involving the pyramidal tract.
How many grand round presentations have you witnessed, starting with demonstration of clonus, increased tone, brisk knee reflexes, and then…the toe goes down. Dear chap, could we …
Funding National Health and Medical Research Council of Australia Program Grant #1037746.
Competing interests The author is the Editor-in-Chief of the Journal of Neurology, Neurosurgery and Psychiatry.
Provenance and peer review Commissioned; externally peer reviewed. This paper was reviewed by David Nicholl, Birmingham, UK.