These technicians monitor the brain's activity during sleep by attaching electrodes to the scalp.
A machine, called an electroencephalograph EEG , records the brain activity during sleep. Other tests monitor eye activity and can provide additional information about REM sleep.
The Stages of Sleep. There are five stages of sleep. Stages one through four range from light sleep to deep sleep, and stage five is REM sleep.
The Science of Sleep: Understanding What Happens When You Sleep | Johns Hopkins Medicine
REM is one of the lightest stages of sleep. REM sleep occurs about every two hours throughout the night. During REM, the brain stops stimulating the brain's motor cortex.
This prevents dreams from causing potentially dangerous movements of the body. Directly after REM, the body descends into a deep sleep. Eco China: Xinjiang carries out projects to improve local ecological environment.
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Sleeping needs may be driven by brain activity intensity: study Source: Xinhua Editor: Mu Xuequan. Video Player Close. The researchers say that by discovering a gene that plays a central role in homeostatic sleep regulation, their findings may help to understand sleep disorders and conditions that impair sleep, such as Alzheimer's disease. Materials provided by University College London. Note: Content may be edited for style and length. Science News. Neuron , ; DOI: ScienceDaily, 16 September University College London.
Brain activity intensity drives need for sleep.
How Dreams Work
Retrieved September 22, from www. If adults remain awake for longer than usual, the brain responds with an increased need for deep sleep. This is measured in the form of "slow wave activity" using
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