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In most animals, slow-wave sleep is characterized by high amplitude, low frequency EEG readings. This is also known as the desynchronized state of the brain, or deep sleep. In USWS, only one hemisphere exhibits the deep sleep EEG while the other hemisphere exhibits an EEG typical of wakefulness with a low amplitude and high frequency.
Unlike most animals, whales are conscious breathers. All mammals sleep, but whales cannot afford to become unconscious for long because they may drown. They are believed to exhibit unihemispheric slow-wave sleep, in which they sleep with half of the brain while the other half remains active. This behaviour was only documented in toothed whales ...
Like other marine mammals, seals sleep in water with half of their brain awake so that they can detect and escape from predators, as well as surface for air without fully waking. When they are asleep on land, both sides of their brain go into sleep mode.
"I woke up around 2:30 a.m. and heard snoring and sneezing," said sailor Michael Duffy.
Before he ended his life, Ryan Larkin made his family promise to donate his brain to science. The 29-year-old Navy SEAL was convinced years of exposure to blasts had badly damaged his brain ...
"Life's a climb. But the view is great." There are times when things seemingly go to plan, and there are other moments when nothing works out. During those instances, you might feel lost.
Eared seals, like whales, show unihemispheric sleep. The sleeping half of the brain does not awaken when they surface to breathe. When one half of a seal's brain shows slow-wave sleep, the flippers and whiskers on its opposite side are immobile. While in the water, these seals have almost no REM sleep and may go a week or two without it.
It is said to be terribly wrong to harm a seal. As she meets other villagers, Fiona hears from a distant cousin, Tadhg, about an ancestor who married a beautiful selkie (seal-woman). The story goes that although theirs was a marriage full of happiness, success and many children, there was always the mysterious seal-bond to the ocean.