Joseph Jules François Félix Babinski (1857-1932)
French Neurologist

In 1896, at a meeting of the Société de Biologie in Paris, Babinski reported his discovery that in certain CNS injuries, when the sole of the foot is scratched, the big toe goes up (extends)  instead of down - a reflex now called the "Babinski's sign". He drew the correct conclusion that the sign is explained by lesions of the pyramidal tract and also noticed that it is to be found in healthy infants. In 1903 he described the fanning of the toes that often occurs simultaneously with the extension of the big toe in lesions of the pyramidal tract.

 Adapted from: www.whonamedit.com/doctor.cfm/370.html