The postnatal development of behavioral states in the rat

Developmental Psychobiology - Tập 3 Số 4 - Trang 267-280 - 1970
Albert Gramsbergen1, P Schwartze1, H.F.R. Prechtl1
1Department of Developmental Neurology, University Hospital, Groningen, The Netherlands

Tóm tắt

AbstractThe ontogeny of behavioral state cycles in white rats has been studied from their 2nd to their 30th day of life. A scale of 5 behavioral states, based on operationally defined categories was employed: state 1: quiet sleep; state 2: active sleep; state 3: quiet wakefulness; state 4: active wakefulness and state 5: locomotion. The percentage of time which young rats spend awake is 2% on the 2nd day, increases then and remains at about 40–60% after the 11th day. Until the 10th day the total sleep time is equally distributed between active sleep and quiet sleep state. After that day a decrement in the relative amount of active sleep occurs. The mean duration of single epochs spent in state 1 increases from less than 1 min on the first days to 6–8 min at about the 25th day. State 2 and state 4 epochs increase only slightly whereas state 3 and state 5 epochs do not show a particular trend.

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Developmental Psychobiology

Tập 3 Số 4

267-280

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