Capgras, Jean-Marie Joseph (1873–1950),
French psychiatrist. Capgras worked at several mental institutions around Paris before being appointed to the staff of Sainte-Anne Hospital, one of the most important psychiatric hospitals in all of France. He first described Capgras syndrome in 1923 in a paper coauthored by his intern Jean Reboul-Lachaux. Their description was based on the case of “Madame M.,” a housewife who was convinced that her family and neighbors had all been replaced by look-alikes. She claimed that her real husband had been impersonated by at least 80 look-alike imposters.