AP PSYCHOLOGY

Detailed explanation-1: -During the rapid eye movement (REM) sleep stage, you’re likely to have dreams. The brain prevents muscles in your limbs from moving to protect yourself from acting dreams out and hurting yourself. Sleep paralysis happens when you regain awareness going into or coming out of REM.

Detailed explanation-2: -Stage 4: REM Sleep While your brain is aroused with mental activities during REM sleep, the fourth stage of sleep, your voluntary muscles become immobilized. Your brain also uses this time to cement information into memory, making it an important stage for learning.

Detailed explanation-3: -Stage 4: REM sleep This stage first happens about 90 minutes after you fall asleep. Your eyes move quickly from side to side during REM sleep. In REM sleep, your brain waves and eye movements increase. Your heart rate and breathing also speed up.

Detailed explanation-4: -As you sleep, your body cycles through non-REM and REM sleep. You usually start the sleep cycle with stage 1 of non-REM sleep. You pass through the other stages of non-REM sleep, followed by a short period of REM sleep. Then the cycle begins again at stage 1.

Detailed explanation-5: -REM sleep first occurs about 90 minutes after falling asleep. Your eyes move rapidly from side to side behind closed eyelids. Mixed frequency brain wave activity becomes closer to that seen in wakefulness.