AP PSYCHOLOGY

Detailed explanation-1: -REM stands for rapid eye movement. During REM sleep, your eyes move around rapidly in a range of directions, but don’t send any visual information to your brain. That doesn’t happen during non-REM sleep. First comes non-REM sleep, followed by a shorter period of REM sleep, and then the cycle starts over again.

Detailed explanation-2: -REM behavior disorder occurs when the body maintains relatively increased muscle tone during REM sleep, allowing the sleeper to move and act out their dreams. Movements may be as minor as leg twitches, but can result in very complex behavior that may cause serious injury to the individual or the bed partner.

Detailed explanation-3: -According to this alternative view, the motor regions of the brain send signals to the muscles during REM sleep, causing them to twitch. The twitching muscles subsequently send feedback to the sensory regions of the brain, which then communicate again with motor regions.

Detailed explanation-4: -During REM sleep, your eyes move rapidly behind your closed eyes, your heart rate speeds up, and your breathing becomes irregular. In contrast to other stages of sleep, in which your brain waves slow down, your brain is highly active during REM sleep, and your brain waves become more variable.