Rapid Eye Movement (REM)

Rapid eye movement (REM) is the stage of sleep characterized by rapid saccadic movements of the eyes.

During this stage, the activity of the brain’s neurons is quite similar to that during waking hours.

Most of the vividly recalled dreams occur during REM sleep.

It is the lightest form of sleep, and people awakened during REM usually feel alert and refreshed..

For more information about the topic Rapid eye movement, read the full article at Wikipedia.org,

Night Terrors

A night terror, also known as sleep terror or pavor nocturnus, is a parasomnia sleep disorder characterized by extreme terror and a temporary inability to regain full consciousness.

The subject wakes abruptly from the fourth stage of sleep, with waking usually accompanied by gasping, moaning, or screaming.

It is often impossible to fully awaken the person, and after the episode the subject normally settles back to sleep without waking..

For more information about the topic Night terror, read the full article at Wikipedia.org,

Circadian rhythm sleep disorder

People with circadian rhythm sleep disorders are unable to sleep and wake at the times required for normal work, school, and social needs.

They are generally able to get enough sleep if allowed to sleep and wake at the times dictated by their body clocks.

Unless they have another sleep disorder, their sleep is of normal quality.

Humans have biological rhythms, known as circadian rhythms, which are controlled by a biological clock and work on a daily time scale.

Due to the circadian clock, sleepiness does not continuously increase as time passes.

Instead, the drive for sleep follows a cycle, and the body is ready for sleep and for wakefulness at different times of the day..

For more information about the topic Circadian rhythm sleep disorder, read the full article at Wikipedia.org.

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