title: Affect, emotion, and activation theories.
mesh_terms: D001143:Arousal; D001341:Autonomic Nervous System / Q000502:physiology; D004644:Emotions; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011572:Psychoanalysis / Q000266:history; D011574:Psychoanalytic Theory; D011582:Psychological Theory; D011603:Psychophysiology