title: Phylogenetic, ontogenetic and environmental determinants in the evolution of sleep-wakefulness cycles.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D001717:Birds; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D003243:Consciousness; D004325:Dreams; D004569:Electroencephalography; D004777:Environment; D005133:Eye Movements; D015186:Hominidae; D006801:Humans; D010507:Periodicity; D051381:Rats; D012756:Sheep; D012890:Sleep; D014851:Wakefulness