AP PSYCHOLOGY

Detailed explanation-1: -The brain stem (especially the pons and medulla) also plays a special role in REM sleep; it sends signals to relax muscles essential for body posture and limb movements, so that we don’t act out our dreams.

Detailed explanation-2: -Your pons is a part of your brainstem, a structure that links your brain to your spinal cord. It handles unconscious processes and jobs, such as your sleep-wake cycle and breathing.

Detailed explanation-3: -The key brain structure for generating REM sleep is the brainstem, particularly the pons and adjacent portions of the midbrain. These areas and the hypothalamus contain cells that are maximally active in REM sleep, called REM-on cells, and cells that are minimally active in REM sleep, called REM-off cells.

Detailed explanation-4: -The pons also contains the sleep paralysis center of the brain and plays a role in generating dreams. The functions of these four nerves include sensory roles in hearing, equilibrium, taste, and in facial sensations such as touch and pain.

Detailed explanation-5: -REM sleep happens about an hour to an hour and a half after falling asleep. REM sleep is when you tend to have vivid dreams.