rapid eye movement sleep

People who are feeling depressed tend to have their sleep patterns altered. Depressed patients either sleep more than required or suffer from insomnia. To understand this, you will need to first understand the types of sleep.

To put it simply, there are two types of sleep, no Rapid Eye Movement Sleep (non-REM sleep) and Rapid Eye Movement Sleep (REM Sleep). The former consists of four stages before REM sleep comes into play. Dreaming often occurs during REM sleep. Contrary to normal people, depressed patients tend to enter REM sleep faster and hence are assumed to dream more, as well as displaying higher frequency of eye movements. However, some people who are depressed may also find it hard falling asleep or they suffer from regular arousals, resulting in lesser total sleep time.