title: [In 1921, 50 years ago, Otto Loewi proved the existence of chemical mediators of the nervous system].
mesh_terms: D000818:Animals; D001001:Anura; D001671:Biochemistry / Q000266:history*; D005858:Germany; D049673:History, 20th Century; D009424:Nervous System Physiological Phenomena; D010600:Pharmacology / Q000266:history*; D010827:Physiology / Q000266:history*; D009435:Synaptic Transmission
vernacular_title: En 1921, il y a cinquante ans, Otto Loewi prouvait l'existence des médiateurs chimiques du système nerveux.