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Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
Crepuscular, a classification of animals that are active primarily during twilight, making them similar to nocturnal animals. Diurnality, plant or animal behavior characterized by activity during the day and sleeping at night. Cathemeral, a classification of organisms with sporadic and random intervals of activity during the day or night.
[7] [8] Dormouse fat was believed by the Elizabethans to induce sleep since the animal put on fat before hibernating. [9] In more recent years, [10] dormice have begun to enter the pet trade; however, they are uncommon as pets and are considered an exotic pet. The woodland dormouse (Graphiurus murinus) is the most commonly seen species in the ...
Theba pisana snails aestivating on Foeniculum vulgare in Montbazin, France. Aestivation (Latin: aestas (summer); also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, although taking place in the summer rather than the winter.
The amount of time spent sleeping during the unihemispheric slow-wave stage is considerably less than the bilateral slow-wave sleep. In the past, aquatic animals, such as dolphins and seals, had to regularly surface in order to breathe and regulate body temperature. USWS might have been generated by the need to perform these vital activities ...
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Sleep is a highly conserved behavior across animal ... represents a smaller portion of total sleep time. ... A far more famous instance of a "long sleep" today is ...
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