phenomenon of sleep is a dream

different brain systems


 Sleep is a state of mind and body that returns to a natural state of unconsciousness, shutting down emotions, reducing muscle activity, and inhibiting almost all voluntary muscles during rapid eye sleep, and reducing interactions with the environment. It is recognized in the state of awakening from sleep by a decrease in the ability to react to stimuli, but it reacts more than coma or mental disorder, sleep reflects the functioning of different brain systems. Sleep occurs in repetitive periods, during which the body alternates between two distinct modes: REM sleep and non-REM sleep.

A well-known phenomenon of sleep is a dream, an experience that is often told in the form of a story, which seems to awaken a continuous life, but which can often be recognized later as a fantasy. During sleep, many of the body's systems are in an anabolic state, helping to restore the immune, nervous, skeletal, and muscular systems; they are important systems that maintain mood, memory and cognitive function, and play an important role in the functioning of the endocrine system. The internal circadian clock promotes sleep each day at night. The various purposes and processes of sleep are the subject of significant ongoing research. Sleep is a highly conserved behaviour through animal evolution.

various sleep disorders

Humans can suffer from various sleep disorders, including dyssomnias such as insomnia, hypersomnia, narcolepsy, and sleep apnea; parasomnias such as sleepwalking and rapid eye movement sleep disorders; bruxism; and circadian rhythm sleep disorders. The use of light has greatly changed the sleeping habits of mankind. Sources of artificial light include viewing electronic devices such as smartphones and televisions, which emit large amounts of blue light, the type of light often associated with daylight. This disrupts the release of the hormone melatonin needed to regulate sleep patterns.
. The brain uses less energy during sleep than when it is awake, especially during non-REM sleep. In the area of ​​reduced activity, the brain restores adenosine triphosphate, a molecule used for short-term storage and energy transfer. During quiet wakefulness, the brain is responsible for 20% of the body's energy, so this reduction has a significant impact on overall energy consumption.
Sleep increases the number of effects. In other words, sleepwalkers perceive fewer stimuli, but can still respond to loud noises and other emotional events. The main physiological methods for monitoring and measuring changes during sleep include brain electroencephalography, electrooculography of eye movements, and electromyography of skeletal muscle activity. Collecting these measurements at the same time is called polysomnography and can be done in a special sleep laboratory. Sleep researchers also use simple electrocardiography for heart activity and actigraphy for motor movements. The types of EEG waves observed are; Alpha waves, beta waves, theta waves, gamma waves, and delta waves are found in different stages of sleep. Each wave has a different frequency and amplitude. Alpha waves are seen when a person is in a state of rest but is still conscious. Their eyes can be closed and their whole body is relaxed and after a little bit, the place starts to slow down.

Beta waves take precedence over alpha waves when people are paying attention, because they may be working or concentrating on something. Beta waves have the highest frequencies and lowest amplitudes, during which a person is fully awake. Alpha and beta waves are the only waves seen during sleep. Gamma waves occur when a person is very focused on a task or uses full concentration. The army of the event awakens during sleep, they continue to sleep 1 seeing water that makes you sleep 3 and 4 of sleep. Non-REM and REM sleep

Sleep is divided into two main types: slow eye movement sleep and rapid eye movement sleep. Non-REM and REM sleep are very different and scientists identify them as different behavioural states. Non-REM sleep begins earlier and after a transition period is called slow-wave sleep or deep sleep. During this time, the body temperature and heart rate drop, and the brain use less energy.
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