title: Individual differences of rats in the first night effect.
mesh_terms: D000064:Acclimatization; D000818:Animals; D001143:Arousal; D002940:Circadian Rhythm; D003624:Darkness; D004569:Electroencephalography; D004777:Environment; D005625:Frontal Lobe / Q000502:physiology; D006624:Hippocampus / Q000502:physiology; D006798:Housing; D051381:Rats; D012890:Sleep; D012894:Sleep Stages; D012895:Sleep, REM; D013997:Time Factors