AP PSYCHOLOGY

Detailed explanation-1: -During REM periods, brain activity shoots back up to levels similar to when you’re awake – which explains why REM is associated with the most intense dreams. While breathing and heart rate increase during REM sleep, most muscles are paralyzed, which keeps us from acting out those vivid dreams.

Detailed explanation-2: -As you cycle into REM sleep, the eyes move rapidly behind closed lids, and brain waves are similar to those during wakefulness.

Detailed explanation-3: -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.

Detailed explanation-4: -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. Dreams typically happen during REM sleep.

Detailed explanation-5: -Also known as paradoxical sleep, REM sleep causes the eyes and brain to act in a way similar to a waking state. During non-REM sleep, the eyes may move in the opposite direction from one another. During REM sleep, the eyes tend to “look” at the same area, just like they would in a fully awake state.