AP PSYCHOLOGY

Detailed explanation-1: -Sleep attacks, where you fall asleep suddenly and without warning, are also common in people with narcolepsy. They may happen at any time. The length of time a sleep attack lasts will vary from person to person.

Detailed explanation-2: -Sleep is important to a number of brain functions, including how nerve cells (neurons) communicate with each other. In fact, your brain and body stay remarkably active while you sleep. Recent findings suggest that sleep plays a housekeeping role that removes toxins in your brain that build up while you are awake.

Detailed explanation-3: -Common causes of chronic insomnia include: Stress. Concerns about work, school, health, finances or family can keep your mind active at night, making it difficult to sleep. Stressful life events or trauma-such as the death or illness of a loved one, divorce, or a job loss-also may lead to insomnia.