Elephant seals drift downwards in a "sleep spiral" when deep diving in the ocean, a new study found. Sleeping while deep diving allows the seals to avoid predators, scientists believe. The scientists ...
Rapid eye movement (REM) sleep brings about brief but periodic awakenings. In 1966, Dr. Frederick Snyder reported the "sentinel" function of REM could help animals prepare a fight or flight response ...
It has long been hypothesized that REM sleep and the stress response are linked, until now the mechanism has been unknown and might shed light on some mood disorder treatments. Everybody hurts after a ...
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