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: -Usually there are four to six cycles per night. You may wake up briefly between cycles. Sleep studies use sensors to record eye movements and brain activity, which are used to classify sleep phases and stages.

Detailed explanation-3: -Stages of sleep Ideally, you need four to six cycles of sleep every 24 hours to feel fresh and rested. Each cycle contains four individual stages: three that form non-rapid eye movement (NREM) sleep and one rapid eye movement (REM) sleep.

Detailed explanation-4: -Everyman sleep cycle The Everyman sleep cycle consists of 3.5 to 4 hours of sleep and three 20-minute naps spread out across the day. This may be suited to those who want to use polyphasic sleep to increase their waking hours but aren’t quite ready for the extremities of the Dymaxion or Uberman cycle.

Detailed explanation-5: -The last NREM stage is stage 4, which lasts approximately 20 to 40 minutes in the first cycle and makes up about 10 to 15 percent of sleep.