When does REM happen?

Answer 1

REM or (Rapid Eye Movement) happens when your asleep, about every 90 minutes in a human and 30 minutes in a dog or cat after they fall asleep until about when they wake up in the morning. A dream lasts from about 5 - 40 minutes. REM happens about every 90 minutes with each one lasting longer than the previous occurance. REM periods come at times when we are not in a deep sleep. Also as the night goes on sleep gets lighter. Someone is more likely to remember the last dream they had because they are closer to being awake, the longest, and they have occured the most recently. It ussualy occurs four or five times every night. The body is paralyzed, heartbeat increases, and the eyes move very quickly from side to side they also move up and down.

Hope that helps

your friend, Ginj88

Answer 2

REM sleep can occur within about 90 minutes of falling asleep.