chapter7v.2

Chapter 7-Altered States of Consciousness Back to the other Version Summary Section 1 Some reasearchers believe thta sleep is restorative,a type of hibernation that is necessary to conserve energy, and a way to clear the mind of useless information. There are Several Stages of sleep Stage I is when your pulse slows a bit more and your muscles relax, but your breathing becaomes uneven and your brain waves grow irregular. Stage II is when you eyes roll slwly from side to side. 30 minutes later, you drift down in o a deeper level a stage III. Stage IV is th deepest sleep of all, and is very hard to be awakend out of.
 * If you were awakend during this stage, you would report that you were "just drifting".
 * This phase lasts for about 10 minutes and is marked by the presence of theta waves, which are lower in amplitude and frequency than alpha waves.
 * If you are awakened by a loud noise or sudden movement, you may feel disoriented.
 * Talking out loud, sleepwalking, and bed wetting-all of which may occur in this stage leave no trace on the memory.

Key Terms Section 1 Consciousness- A state of awareness, including a person's feelings, sensations, ideas,and perceptions.

REM Sleep- A stage of sleep characterized by rapid eye movements, a high leel of brain activivty, a deep relaxation of the muscles, and dreaming.

Circadian Rhythm- The rhythm of activity and inactivity lasting approximately one day.

Insomnia- The failure to get enough sleep at night in order to feel rested the next day.

Sleep Apnea- A sleep disorder in which a person has trouble breathing while asleep.

Narcolepsy- A condition characterized by suddenly falling asleep or feeling very sleepy during the day.

Nightmares- Unpleasant dreams

Night Terrors- Sleep disruptions that occour during Stage IV of sleep, involving scraming, panic, or confusion.

Sleepwalking- Walking or carrying out behaviors while asleep.

Section 2 Hypnosis- A state of consciousness resulting from a narrowed focus of attention and characterizd by heightened suggestibility.

Posthypnotic suggestion- A suggestion made during hypnosis that influencs the participant's behavior afterward.

Biofeedback- The process of learning to control bodily states with the help of specialized machines.

Meditation- The focusing of attention to clear one's mind and produce relaxation.

Section 3 Psychoactive Drugs- Chemicals tht affect the nervous system and result in altered consciousness.

Marijuanna- The dried leaves and flowers of indian hemp that produce and altered state of consciousness when smoked or injested.

Hallucinations- Perceptions that have no direct external cause.

Hallucinogens- Drugs that often produce hallucintions.

LSD- A potent psychedelic drug that produces distortions of percption and thought.