![]() National Library of Medicine, Biotech Information The National Center for Biotechnology Information advances science and health by providing access to biomedical and genomic information. However, now that scientists know we can experience dreams during non-REM sleep stages when our bodies are not paralyzed, this hypothesis is losing steam. Researchers have hypothesized that this is a protective measure, meant to stop you from acting out your dreams and injuring yourself. In contrast to other stages of sleep, in which your brain waves slow down, your brain is highly active during REM sleep, and your brain waves become more variable.ĭuring REM sleep, much of your body operates similarly to how it does when you're awake, except your eyes are closed and you experience a temporary loss of muscle tone. What Happens During REM Sleep?ĭuring REM sleep, your eyes move rapidly behind your closed eyes, your heart rate speeds up, and your breathing becomes irregular. These rapid eye movements, or REMs, earned REM sleep its name. ![]() REM sleep was first discovered in the 1950s, when scientists studying sleeping infants noticed that there were distinct periods when their eyes moved rapidly from side to side. ![]() National Institute of Neurological Disorders and Stroke (NINDS) NINDS aims to seek fundamental knowledge about the brain and nervous system and to use that knowledge to reduce the burden of neurological disease. Rapid eye movement (REM) sleep is a stage of sleep associated with dreaming and memory consolidation We explore the mysteries of REM sleep, why we need REM sleep, what happens when we don't get enough REM sleep, and the sleep disorders associated with this stage of sleep. Many people have been told REM sleep is the stage of sleep in which you dream, but REM is involved in a host of important functions, from brain development View Source, including active sleep, desynchronized sleep, paradoxical sleep, rhombencephalic sleep, and dream sleep. Rapid eye movement (REM) sleep goes by many names Read our full Advertising Disclosure for more information.
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