Three-toed sloths ( Bradypus) are heterothermic, and ambient temperature may have a direct effect on their activity levels. The pattern of sleep is polycyclic but in the laboratory situation animals were sleeping most soundly between 6 a.m. The total duration of sleep and of paradoxical sleep did not depart materially from the expected pattern based on phylogenetic position.ġ0.
EEG patterns of deep sleep constituted about 10% of the records all of this came during behavioral sleep.ĩ. EEG patterns of light sleep constituted about 56% of the records, about 6% of that during some form of waking behavior.Ĩ. Waking EEGs of various types were seen about 34% of the time, about 10% of that during behavioral sleep.ħ. Animals spent about 30% of the time in various degrees of waking behavior and about 70% asleep.Ħ. EEG patterns of sleep were divided into five types: two in light sleep, two in deep sleep and one in paradoxical sleep.ĥ. A 1 which was seen during both “awake-exploring” and “awake-alert” behavior and A 2, which had some of the characteristics of drowsy behavior of other mammals and often accompanied the “awake-fixating” behvaior.Ĥ. EEG recordings were classified as two waking states. Three states of waking behavior were recognized, “awake-exploring”, “awake-alert” and “awake-fixating”.ģ. The sleep-waking cycles of the three-toed sloth, Bradypus tridactylus, were studied by direct observation and polygraphic recording and the results were correlated.Ģ.
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