title: Behavioral aspects of circadian rhythms.
mesh_terms: D000818:Animals; D001362:Avoidance Learning; D002940:Circadian Rhythm; D003213:Conditioning, Psychological; D004193:Discrimination Learning; D004777:Environment; D004924:Escape Reaction; D005108:Extinction, Psychological; D005239:Fear; D007858:Learning; D008027:Light; D008297:Male; D008568:Memory; D011678:Punishment; D051381:Rats