[Neurophysiological characteristics of the resting forms of primary sleep and hypobiosis in the frog Rana temporaria]

Abstract

Neurophysiological studies have been made on natural resting forms of the primary sleep, wakefulness and hypobiosis in the frog. New method of presentation of the distribution density of EEG signal by a frequency spectrum was used. New data were presented concerning seasonal changes in the frequency parameters of one of the resting forms of the primary sleep, SLS-2. The role of this form of rest in the origin of hypobiosis in the frog Rana temporaria is discussed. Besides, new data were obtained which confirm that the resting form, SLS-3, of the primary sleep is an evolutionary precursor of the intermediate form of the sleep in reptiles and slow wave and activated phase of the sleep in warm-blooded vertebrates.