Who is Jean-Martin Charcot whose work Gabbert cites in "Witches and Whiplash" in the essay collection, Unreality of Memory?

Gabbert identifies Charcot as one of the first doctors to sanction and tout hysteria as a "legitimate, inherited, and functional disease of the nervous system" (127). His notions about hysteria rapidly spread throughout the population, leading an increased number of women to display symptoms of the condition. However as soon as his ideas were discredited by other doctors, women seemingly stopped presenting symptoms of hysteria. Gabbert uses this account in order to consider Freud's theory of conversion disorder in the passages following.