Health

The wellness boost of a purposeful life

(HealthDay)—Research has long shown how psychological disorders lead to poor physical health. Now scientists are learning more about the flip side of emotions, how living a purposeful life may have as many physical benefits ...

Medical research

Easy at-home assessment of sleep bruxism

Sleep bruxism, commonly known as clenching or grinding of the teeth during sleep, affects approximately eight to 15 percent of the population. It can lead to various negative health consequences like tooth wear, facial pain ...

Psychology & Psychiatry

Have a vexing problem? Sleep on it.

New Northwestern University research shows people actually might solve a problem better if they "sleep on it." In fact, the researchers were able to improve problem solving upon waking by manipulating a critical process during ...

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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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