PSYC 2000 Chapter : SI Session 10 Worksheet
Document Summary
During early light sleep (stages 1: the brain enters a high amplitude, slow, regular wave form called theta waves . We spend most of the night in sleep. stage 2 sleep. During deepest sleep (stages 3-4) brain activity slows down. There are large amplitude, the slow delta waves. After reaching deepest sleep (stage 4) the sleep cycle starts moving backward towards stage 1. Although still asleep, the brain engages in low amplitude, fast and regular beta waves much like awake-aroused state. A person in this sleep phase exhibits rapid eye movements (rem) and reports vivid dreams. Drugs: substance abuse: physical symptoms, substance dependence: physiological symptoms, psychological dependence, physical dependence, stimulants: drugs that increase the functioning of the nervous systems, caffeine: heightened arousal, reduced fatigue, too much causes tension, anxiety, 90% americans use caffeine, relieve withdrawal symptoms: nicotine: more addictive than heroin or alcohol, #1 cause of preventable death in.
