Textbook Notes (368,276)
Canada (161,758)
Psychology (222)
PSYC 1200 (40)
Chapter 5

PSYC 1200 - Chapter 5.docx

3 Pages
Unlock Document

PSYC 1200
Jason Leboe- Mcgowan

 Consciousness is the awareness of internal and external stimuli  William James described continuous flow as stream of consciousness Variations in Awareness and Control  Koch and Tsuchiya have argued that you can have attention or consciousness - they don't have to go together  Blink - book by Malcolm Gladwell - refers to how quickly and effortlessly some of our judgements and choices are made Consciousness and Brain Activity  Electroencephalograph (EEG): device that monitors the electrical activity of the brain over time by means of recording electrodes attached to the surface of the scalp  When you are alertly engaged in problem solving, beta waves tend to dominate  When you are relaxed and resting, alpha waves increase  William Dement is credited with creating the first modern scientific laboratory dedicated to researching sleep  Biological ryhthms: periodic fluctuations in physiological functioning The Roles of Circadian Rhythms  Circadian rhythms: the 24 - hour biological cycles found in humans and many other species o In humans, they are regulated by multiple internal clocks  When exposed to light, some receptors in the retina send direct inputs to a small structure in the hypothalamus called the suprachiasmatic nucleus (SCN) o The SCN sends signals to the pineal gland, which secrets melatonin - plays a key role in adjusting biological clocks The Sleep and Waking Cycles  Electromyograph (EMG): record muscular activity and tension  Electrooculograph: records eye movements  Five stages of sleep o Stage 1 - brief, transitional stage of light sleep that lasts 1 - 7 minutes  Breathing and heart rate slow, as muscle tension and body temperature decline o Stage 2 - typically lasts 10 - 25 minutes  Brief bursts of higher-frequency brain waves, called sleep spindles, appear against a background of mixed EEG activity o Slow wave sleep: consists of stages 3 and 4 during which high amplitude, low frequency delta waves become prominent in EEG recordings  Reached after half an hour, stay there for 30 minutes  Sleep moves back up through the stages - REM occurs when stage 1 should occur  REM sleep was discovered accidently in the 1950's in Nathanial Kleitman's lab o Marked by irregular breathing and pulse rate, extremely relaxed muscle tone  REM sleep: relatively deep stage of sleep marked by rapid eye movements, high- frequency, low-amplitude brain waves, and vivid dreaming  Non-REM (NREM) sleep consists of sleep stages 1 through 4, which are marked by an absence of rapid eye movements, relatively little dreaming, and varied EEG activity  Young adults typically spend 15 - 20% of their sleep time in slow-wave sleep and another 20 - 25% in REM sleep Age Trends in Sleep  Infants spend much more time in REM sleep than adults do Culture and Sleep  Differences relate to peripheral matters, such as co-sleeping and napping arrangements The Neural Bases of Sleep  Ascending reticular activating system (ARAS): consists of the afferent fibers running through the reticular formation that influence physiological arousal Doing Without: Sleep Deprivation  Research had mostly focused on partial sleep deprivation, or sleep restriction  REM deprivation has little impact on daytime functioning and task performance o Results in more freq
More Less

Related notes for PSYC 1200

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.