title: Trace reflex formation in senescence and senility.
mesh_terms: D000368:Aged; D000375:Aging; D001925:Brain Damage, Chronic; D003214:Conditioning, Classical; D003213:Conditioning, Psychological; D005108:Extinction, Psychological; D005260:Female; D005712:Galvanic Skin Response; D006801:Humans; D008297:Male; D008875:Middle Aged; D012018:Reflex; D012055:Reinforcement Schedule; D013997:Time Factors; D013998:Time Perception