Psychology & Psychiatry

Rare sleep disorder common among veterans with PTSD

Military veterans with post-traumatic stress disorder or concussion suffer from a thrashing form of sleep behavior at a rate that is far higher than the general population, according to a new study by researchers at the VA ...

Neuroscience

Key to learning and forgetting identified in sleeping brain

Distinct patterns of electrical activity in the sleeping brain may influence whether we remember or forget what we learned the previous day, according to a new study by UC San Francisco researchers. The scientists were able ...

Medical research

Sleep and synaptic rhythms

Chronobiologists at Ludwig-Maximilians-Universität (LMU) in Munich, Germany, show in two articles in the journal Science how critical the sleep-wake cycle is for protein and phosphorylation dynamics in synapses to ultimately ...

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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