Étienne_Jacques_Marie_Raymond_Céstan

Étienne Jacques Marie Raymond Céstan (6 April 1872, Gaillac – 1934) was a French neurologist.
From 1892 he studied medicine in Paris, and was subsequently a hospital interne and a student of Édouard Brissaud at the Salpêtrière. In 1899 he received his medical doctorate, and was chosen by Fulgence Raymond to be chef de clinique at the Salpêtrière. In 1903 he was put in charge of the histopathology laboratory, and during the following year, he obtained his agrégation. Soon afterwards, he moved to Toulouse, where in 1913 he attained the chair of psychiatry. At this position he conducted research on the development of cerebrospinal fluid and the effects of intra-ventricular injection.