chp4 - Michael Mann 2/2/2008 PYS2012 Chapter 4:...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Michael Mann 2/2/2008 PYS2012 Chapter 4: Consciousness: Sleep, Dreams, Hypnosis, and Drugs I. What is consciousness? A. Definition * a person's awareness of everything that is going on around them at any given moment. * walking consciousness is where these feelings are organized and you feel alert B. Altered states of consciousness * state in which there is a shift in the quality or pattern of mental activity as compared to walking consciousness * fuzzy and disorganized thoughts * pathways include; drugs, daydreaming, and hypnosis II. Altered States: Sleep A. The Necessity of Sleep * sleep is known as the "gentle tyrant" * sleep is one of the boy's biological rhythms , or natural cycles the body must go through 1. The rhythms of life: circadian rhythms * sleep-wake cycle is a circadian rhythm * Latin word circa - about and diem - day * circadian rhythm is a cycle that takes "about a day" to complete * sleep is controlled by the hypothalamus 2. The role of the hypothalamus: the mighty mite * area with the hypothalamus called the suprachiasmatic nucleus (SCN) is our brains internal clock * when daylight fades the SCN tells the pineal gland to secrete the hormone melatonin * melatonin makes one sleepy * when daylight increases the SCN tells the pineal gland to stop secreting melatonin * Serotonin may also be linked to sleepiness * Body temperature can play a part as well * SCN may be responsible for reseting the "clock" each day. 3. The price of not sleeping * microsleeps- brief sidesteps into sleep lasting only a few seconds * lack of sleep can lead to concentration problems and the inability to do simple tasks * sleep deprivation- any significant loss of sleep, resulting in problems in concentration and irritability *symptoms include trembling hands, inattention, droopy eyelids, general
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/17/2008 for the course HUN 1201 taught by Professor Zimmerman during the Spring '08 term at Tallahassee Community College.

Page1 / 4

chp4 - Michael Mann 2/2/2008 PYS2012 Chapter 4:...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online