The postnatal development of behavioral states in the rat.

@article{Gramsbergen1970ThePD,
  title={The postnatal development of behavioral states in the rat.},
  author={Albert Gramsbergen and Prof. H. Schwartze and Heinz R. F. Prechtl},
  journal={Developmental psychobiology},
  year={1970},
  volume={3 4},
  pages={
          267-80
        }
}
The 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… CONTINUE READING
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