title: [Effect of emotional stress on sleep dynamics in cats].
abstract: Emotional stress was developed in cats by putting them in one cage with dogs for 24 hours. Then the 24 hours sleep-walking cycles records revealed prolonged REM stage in day time or at night in five animals out of seven, and in six animals a general increase of REM sleep duration over 24 hours. Simultaneously, in six animals the length of drowsiness and of deep slow-wave sleep stages was reduced. Increased overall sleep duration in the 24 hours was recorded in five cats. Sleep changes dynamics analysis reveals three stages: 1) sharp shift of all sleep parameters--27%, 2) deviation in sleep parameters--34% and 3) returning to basic sleep parameters--in 38%. The conclusion is drawn that sleep disorders may be used as an index of higher nervous activity disturbance in waking state.
mesh_terms: D000818:Animals; D001921:Brain / Q000503:physiopathology*; D002415:Cats; D002540:Cerebral Cortex / Q000503:physiopathology; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology; D012895:Sleep, REM / Q000502:physiology; D013315:Stress, Psychological / Q000503:physiopathology*; D013997:Time Factors
vernacular_title: Vliianie émotsional'nogo stressa na dinamiku sna u koshek.