
Quantitative analysis of the ECoG stages in four bottle-nosed dolphins has demonstrated that unihemispheric slow-wave sleep is the dominant type of their natural sleep. All the variants of the bilateral and unilateral ECoG synchronization comprise 33.4% of the total recording time, with unilateral slow-wave sleep accounting for 28.8%. A single brain hemisphere is in a state of ECoG synchronization for 19% of the total recording time. The maximal amount of sleep is registered during a night and the second half of the day. Unihemispheric sleep episodes tend to appear alternatively in both hemispheres.
Male, Dolphins, Animals, Electroencephalography, Female, Sleep Stages, Cortical Synchronization, Dominance, Cerebral, Circadian Rhythm, Electrodes, Implanted
Male, Dolphins, Animals, Electroencephalography, Female, Sleep Stages, Cortical Synchronization, Dominance, Cerebral, Circadian Rhythm, Electrodes, Implanted
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