Altered Growth Hormone Secretory Pattern Following Prolonged Sleep Deprivation in the Rhesus Monkey

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Abstract
Plasma concentrations of growth hormone (GH) were determined in samples obtained sequentially at 15-min intervals during the last 4 h in monkeys deprived of sleep for 76 h and the first 8 h of ensuing recovery sleep. Electroencephalographic (EEG), electro-oculographic (EOG), and electromyographic (EMG) activities were recorded. Stages 3–4 sleep occurred rapidly after sleep onset and were of long duration. Plasma GH secretion was markedly elevated during sleep recovery, without apparent relationship to stage of sleep.

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