title: A critique of psychic energy as an explanatory concept.
mesh_terms: D001519:Behavior / Q000502:physiology; D004328:Drive; D004734:Energy Metabolism; D005619:Freudian Theory; D006801:Humans; D001523:Mental Disorders / Q000209:etiology; D008606:Mental Processes; D008959:Models, Neurological; D009482:Neurophysiology; D055585:Physical Phenomena; D010825:Physics; D011574:Psychoanalytic Theory