PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -Approximately 75% of sleep is spent in the NREM stages, with the majority spent in the N2 stage.[14] A typical night’s sleep consists of 4 to 5 sleep cycles, with the progression of sleep stages in the following order: N1, N2, N3, N2, REM.[15] A complete sleep cycle takes roughly 90 to 110 minutes.

Detailed explanation-2: -Stage 5: Non-REM Sleep The eyes move rapidly, breathing becomes shallow and rapid, and blood pressure and heart rate increase. During REM sleep, the arms and legs are paralyzed so that sleepers can’t act out their dreams. The purpose of this stage is to stimulate the sections of the brain used for memory and learning.

Detailed explanation-3: -In a typical night, a person goes through four to six sleep cycles. View Source . Not all sleep cycles are the same length, but on average they last about 90 minutes each.

Detailed explanation-4: -There are 4 stages of sleep that your body experiences each night (usually spanning 3-5 sleep cycles): Light sleep, deep sleep (also referred to as slow wave sleep or SWS), REM sleep and awake. For a more in-depth explanation of how this works, check out Understanding Sleep Cycles and the Stages of Sleep.