Edouard Seguin is remembered for his work with children and he was intelligent.
 Voisin also did extensive research of satyriasis and nymphomania, and was interested in the relationship between hypersexuality and hysteria
In his 1851 treatise Analyse de l'entendement humain (Analysis of Human Understanding), Voisin described three major facets of human functionality, which he referred to as moral, intellect and animal factions

