Constantin von Economo's last publication: a commentary on Charles Fraipont's "Évolution cérébrale".

This paper highlights a commentary written by the neurologist Constantin von Economo on a book published by the Belgian paleontologist Charles Fraipont in 1931. The commentary appears to be Economo's last opus, published posthumously in early 1933. The reviewed work deals with the evolution of the brain in primates, hominids and humans, presenting some interesting ideas about the phylogeny of the human cerebral hemispheres in conjunction with the living conditions of the genera in consideration.