Some mornings, waking up might feel like interrupting a vivid alternate universe. You open your eyes to reality, but the ...

During non-REM sleep, participants received auditory cues to reinforce positive memories and reduce negative ones.

Essentially, sleep is divided into two stages – non-rapid eye movement (non-REM, which the researchers refer to as NREM) sleep and REM sleep – and it's widely understood both play distinct ...

Sleep can be divided into 2 phases — non-rapid eye movement (NREM) and rapid eye movement (REM) — and 4 stages that make a complete cycle. You’ll typically complete 4 to 6 cycles per night.

The frequency and duration of large muscle group leg movements during sleep change over time, and show distinct sleep stage differences.

A study published in the Proceedings of the National Academy of Sciences journal found good news for people looking to forget ...

and deepest sleep, all of which are classified as non-rapid eye movement (NREM) sleep. The fourth stage is rapid eye movement (REM) sleep, which is when lucid dreams can occur. These four stages ...

Every minute or so during non-rapid eye movement (NREM) sleep, the brain releases a wave of norepinephrine, a hormone that is one of the brain’s primary neurotransmitters. Norepinephrine is a ...