Psy 240 Sleep Deprivation, Disorders and Drugs

Sleeping and Dreaming CheckPoint

PSY 240 The Brain, The Body, and The Mind

There are two main types of sleep; first you have Non-Rapid Eye Movement Sleep or NREM (also known as quiet sleep and Rapid Eye Movement Sleep or REM (also known as active sleep or paradoxical sleep. This is broken down into five stages.

The first stage is the beginning of the sleep cycle. It is considered to be a light stage of sleep. It is a transition period between wakefulness and sleep. Stage one lasts only a brief time (around 5-10 minutes).

The second stage is when the brain begins to produce bursts of rapid, rhythmic brain wave activity known as sleep spindles. This only lasts for about 20 minutes and your body tempiture begins to decrease and the heart...