AP PSYCHOLOGY

Detailed explanation-1: -People with narcolepsy frequently enter REM sleep rapidly, within 15 minutes of falling asleep. Also, the muscle weakness or dream activity of REM sleep can occur during wakefulness or be absent during sleep. This helps explain some symptoms of narcolepsy.

Detailed explanation-2: -In narcolepsy, you may suddenly enter REM sleep without going through NREM sleep. This can happen both at night and during the day. Cataplexy, sleep paralysis and hallucinations are similar to changes that occur in REM sleep. But in narcolepsy they happen while you’re awake or drowsy.

Detailed explanation-3: -Many cases of narcolepsy are thought to be caused by a lack of a brain chemical called hypocretin (also known as orexin), which regulates sleep. The deficiency is thought to be the result of the immune system mistakenly attacking parts of the brain that produce hypocretin.

Detailed explanation-4: -What causes narcolepsy. Narcolepsy is often caused by a lack of the brain chemical hypocretin (also known as orexin), which regulates wakefulness. The lack of hypocretin is thought to be caused by the immune system mistakenly attacking the cells that produce it or the receptors that allow it to work.