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The brain also responds differently to sound during microsleep than it does during wakefulness or sleep. During microsleep, much of the brain that becomes deactivated during sleep remains activated, including areas of the brain dedicated to staying awake. Brain scans conducted using functional magnetic resonance imaging (fMRI) show that microsleep involves brain activity that differs from that found in regular sleep. View Source by measuring brain activity, by observing a person’s face and body, or by testing their psychomotor performance.ĭuring a microsleep episode, brain waves measured by an electroencephalogram (EEG) noticeably slow down. National Library of Medicine, Biotech Information The National Center for Biotechnology Information advances science and health by providing access to biomedical and genomic information. Microsleep episodes can look different from person to person, but they are often identified by a person briefly closing their eyes or experiencing lapses in attention. Microsleep is sometimes referred to as behavioral microsleep because it is characterized by changes in behavior. Scientists are working to better understand what occurs in the brain during microsleep by studying the phenomenon in both humans and animals During a microsleep episode, people lose conscious control of their performance. Researchers generally define microsleep as sleep episodes that last for 15 seconds or less

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Microsleep commonly occurs when people are performing monotonous tasks, such as driving on an empty highway.īecause microsleep can happen to anyone and have serious consequences, such as a potentially increased risk of car crashes, it is important to learn exactly what microsleep is, how it affects people, and how to manage it. People who do not have sleep disorders can experience microsleeps, too, even after a single night of restricted sleep or no sleep deprivation at all. Because of this, many people with sleep disorders, such as shift work disorder or obstructive sleep apnea, experience microsleeps. Microsleeps are most likely to occur after sleep deprivation. Regardless of how someone appears during a microsleep episode, their brain is not processing external information like usual. A person might nod off during microsleep or keep their eyes open and continue to look awake.

Even if you are not familiar with the words microsleep or micro napping, you have likely experienced this phenomenon or witnessed someone else experience it. The term microsleep refers to very short periods of sleep that can be measured in seconds, rather than minutes or hours.

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