NREM-3 Sleep

Definition

Also known as deep sleep or slow-wave sleep, this is the third stage in the cycle of non-rapid eye movement (NREM) sleep, during which the body repairs and regrows tissues, builds bone and muscle, and strengthens the immune system.

Related terms

Rapid Eye Movement (REM) Sleep: This is a stage of sleep characterized by rapid eye movements, more dreaming and bodily movement, and faster pulse and breathing.

Sleep Cycle:

The pattern of shifting through stages of NREM sleep to REM sleep before beginning again with NREM.

Delta Waves:

These are high amplitude brain waves that are associated with deep sleep (NREM-3).