REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

A sleep cycle is made up of four main stages: REM, and NREM1, 2 and 3 ... diagnoses and enable tailored treatment pathways. In the graph below, you can see how I slept for the full duration ...

A new study reveals that not getting enough of specific stages in the sleep cycle may be linked to cognitive decline and ...

REM sleep, which refers to the deepest, most dream-filled portion of our sleep cycle, is essential for a restful night and plays a vital role in memory consolidation within the brain. Elderly ...