Sleeping

Definition

Sleeping refers to the natural state of rest in which consciousness and voluntary muscle activity are temporarily suspended, and the body is replenished.

Related terms

REM Sleep:

REM sleep stands for Rapid Eye Movement sleep and is a stage of sleep characterized by vivid dreaming, rapid eye movement, and increased brain activity.

NREM Sleep:

NREM sleep stands for Non-Rapid Eye Movement sleep and consists of three stages (N1, N2, N3) that involve progressively deeper levels of relaxation.

Circadian Rhythm:

Circadian rhythm refers to the internal biological clock that regulates our daily patterns of wakefulness and sleepiness.