Acquisition and retention in different learning tasks in old rats.
D000375:Aging; D000818:Animals; D001362:Avoidance Learning; D004193:Discrimination Learning; D008297:Male; D008568:Memory; D009949:Orientation; D051381:Rats; D011919:Rats, Inbred Strains; D012153:Retention, Psychology; D014796:Visual Perception