REM sleep makes up the remaining 25% of a normal sleep cycle and typically occurs about 90 minutes after the onset of sleep. Stages 3 and 4 are our stages of deep sleep, also known for being the “delta wave” or “restorative” sleep stages.ĭuring these stages brainwaves slow considerably and the body has time to truly rest and repair itself: relaxing and increasing blood flow to muscles, slowing breathing and heart rate and releasing hormones essential for growth and repair. Stages 1 and 2 are the lighter stages of sleep, occurring just as a person begins to fall into sleep. Non-REM sleep makes up 75% of a normal sleep cycle and consists of stages 1-4, each typically lasting for 5-15 minutes. A normal sleep cycle will go through stages 1-4 before moving into REM, and then alternating between Another random sample of 10 adults showed that they had an.

A random sample of 10 children showed that they had an average REM sleep time of 2.8 hours per night with standard deviation 0.5 hour.

Assume that REM sleep is normally distributed for both children and adults. There are two main categories for these stages: REM (Rapid Eye Movement) sleep and non-REM sleep. However, it is thought that adults have less REM sleep than children. Healthy sleep cycles To fully understand how narcolepsy affects the brain, first you must learn a bit about how a normal brain works…Ī healthy person will get around 6-8 hours of sleep on average, and in this time they will go through several “stages” of sleep.

Average rem sleep in 8 hours