title: Extinction: new excitement for an old phenomenon.
authors.affiliation: Department of Physiology, Ponce School of Medicine, Ponce, Puerto Rico 00732.
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Quirk
mesh_terms: D000679:Amygdala / Q000502:physiology; D000818:Animals; D001522:Behavior, Animal; D003214:Conditioning, Classical; D005108:Extinction, Psychological; D005239:Fear; D006801:Humans; D007858:Learning