Development of sleep state patterns in the kitten

摘要: Abstract In the present study maturation of states sleep in kittens from birth to 6 weeks age was evaluated terms developmental emergence temporal concordance between defining physiological parameters. addition, periodicity earliest alternation states, REM-non-REM (rapid eye movement-nonrapid movement) or “basic rest activity cycle”, traced during this same interval. Parameters studied included EEG, movements, neck EMG, gross motor activity, and respiration patterns. Kittens were monitored isolation for periods 2–6 hr, providing collection both longitudinal cross-sectional data. Statistical computer analyses performed on these The most outstanding feature polygraphic data 4 gradual coalescence initially discordant measures state. Prior 3 age, patterns differed significantly those adult cat, indicating that individual rates existed each system measured. Sleep state weak at time due marked pattern fragmentation. Detectable cycles clearly shorter than observed cat. These findings suggest assessment might be a more useful index evaluation based upon attempted comparisons with stable They further development kitten consists several different stages. initial basic cycle may begin gestation, disrupted by transition extrauterine life. A postnatal period approximately 3–6 is required sensorimotor respiratory functions completion stage. It proposed months forebrain environmental influences progressively mediate mature sleep-wake which superimposed level organization.