Neuroscience

Can having a stroke change your sleep?

People who have had a stroke may be more likely to sleep too much or too little compared to those without prior stroke, according to a study published in the September 11, 2024, online issue of Neurology. The study does not ...

Health

No-sleep challenge: The dangers of sleep deprivation

Most of us will be all too familiar with that dopey, groggy feeling of being tired after a restless night. Some social media users have taken tiredness to the extreme, however, by taking part in what they call a "no-sleep ...

Sleep

Sleep is a natural state of bodily rest observed in humans and other animals. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, and it is more easily reversible than hibernation or coma. It is common to all mammals and birds, and is also seen in many reptiles, amphibians, and fish. In humans, other mammals, and a substantial majority of other animals that have been studied (such as some species of fish, birds, ants, and fruit flies), regular sleep is essential for survival.

The purposes and mechanisms of sleep are only partly clear and are the subject of intense research.

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