When the bain is idle is it REM or NREM?
Rapid eye movement (REM) sleep is the normal stage of sleep characterized by rapid movements of the eyes. REM sleep is classified into two categories: tonic and phasic. REM sleep in adults typically occupies 20-25% of total sleep, lasting about 90-120 minutes. During a normal night of sleep, we usually experience about 4 or 5 periods of REM sleep; they are quite short at the beginning of the night and longer at the end. REM sleep is physiologically different from the other phases of sleep that the others are collectively referred to as non-REM sleep. Most of our vividly recalled dreams occur during REM sleep. REM Dreams and Non-REM dreams are very different from each other in a few major ways. The first difference between the two is Non-REM dreams consist of brief, fragmentary impressions. They are also less likely to involve visual images compared to REM sleep, and are more frequently forgotten. Non-REM dreams are like thinking about something during the day for a brief period of time
