There is evidence that marine mammals practice unihemisphericsleep: sleep that occurs in only one brain hemisphere at atime, so that while one hemisphere sleeps, the other is awake.Such sleep is essentially unheard of in terrestrial mammals(although common in birds). What might be the advantages ofunihemispheric sleep for a marine mammal?

Essentials Of Human Development
1st Edition
ISBN:9781285647357
Author:Kail
Publisher:Kail
Chapter4: The Emergence Of Thought And Language: Cognitive Development In Infancy And Early Childhood
Section4.1: The Onset Of Thinking
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There is evidence that marine mammals practice unihemispheric
sleep: sleep that occurs in only one brain hemisphere at a
time, so that while one hemisphere sleeps, the other is awake.
Such sleep is essentially unheard of in terrestrial mammals
(although common in birds). What might be the advantages of
unihemispheric sleep for a marine mammal?

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