- CNS), most likely in a part of the CNS called the pyramidal tract. Asymmetry of the toe sign — when it is present on one side but not the other — is abnormal. It is a sign not merely of trouble but helps to lateralize that trouble (tell which side of the CNS is involved). The toe sign is known by a number of other names: the plantar response (because the sole is the plantar surface of the foot), the big toe sign or phenomenon, the Babinski phenomenon or sign. (It is incorrect to say that the Babinski sign is positive or negative; it is present or absent). Babinski, despite the Slavic sound of the name, was French: Joseph Francois Felix Babinski (1857-1932). His name will never be forgotten in medicine, thanks to the toe sign he described.
Medical dictionary. 2011.
Look at other dictionaries:
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