title: Binocular and monocular/unihemispheric sleep in the domestic chick (Gallus gallus) after a moderate sleep deprivation.
abstract: Binocular (Bin-sleep) and monocular/unihemispheric sleep (Mo-Un sleep) were studied in domestic chicks (Gallus gallus) after an 8 h period of sleep deprivation. Eleven-day-old chicks were divided into three groups: two non-deprived (N-DEP1 and N-DEP2) and one deprived for 8 h (DEP-8H). Deprivation was performed by placing chicks on a treadmill on which they were forced to walk continuously. Sleep behaviour was recorded for 6 h consecutively immediately after the end of sleep deprivation. During the recovery period, sleep-deprived chicks slept for a longer duration, spent significantly more time in binocular sleep and slept for significantly longer episodes that did control chicks. Regarding Mo-Un sleep, sleep deprivation seems to affect the right hemisphere by reducing the number of episodes and the time spent sleeping with the left eye closed. These results suggest that sleep-deprivation significantly influences the pattern of sleep in domestic chicks allowing for a better recovery.
authors.affiliation: Department of General Psychology, University of Padova, Via Venezia 8, 35131, Padova, Italy. daniela.bobbo@unipd.it
authors.forename: Daniela
authors.initials: D
authors.lastname: Bobbo
authors.forename: Cristian
authors.initials: C
authors.lastname: Nelini
authors.forename: Gian G
authors.initials: GG
authors.lastname: Mascetti
mesh_terms: D000818:Animals; D002645:Chickens / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D012892:Sleep Deprivation / Q000503:physiopathology*; D012894:Sleep Stages / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology*; D015349:Vision, Monocular / Q000502:physiology*