STUDY GUIDE Test 2
What is consciousness?
is our awareness of ourselves and our environment.
What are the types of mental processing without awareness we covered?
- exposing someone to something before an experiment (ex. feet/feat…
mention “that was a great feat” more likely to spell it feat not feet)
- our tendency to like things that we’re familiar with
- Consciously blind, subconsciously can process info (ex. Guess what color
was flashed in front of them, they mostly will guess correctly.)
What is sleep? What is a circadian rhythm? What is the suprachiasmatic nucleus and where is it
located? Does everyone have the same rhythm of alertness?
During sleep, we are in an altered consciousness. (Body is not active, but mind is very
is your body’s natural (biological) clock. (Sleep/hormones/temperature-
ex. Body’s temperature rises as morning approaches, peaks during the day, drops again
when we go to sleep.)
nucleus of hypothalamus
- body cycle, it is genetic. Ex. Some people are
morning/night people, etc.
No, everyone does not have the same rhythm of alertness. (see above)
What are the stages of sleep? How does the EEG change during the stages of sleep?
EEG- Electro esepherogram, measures electrical activities in the brain, changes in the
stage of sleep.
Stages 1-4- gets deeper into sleep, EEG waves get higher amplitude the higher level of
Slow-wave sleep- levels 3-4, most likely to sleep walk
How does one progress through the sleep stages during a night’s sleep?
Level 1, 2, 3, 4, 3, 2, 1, REM, 1, 2, 3, 4, 3, 2, 1, REM, 1, 2, 3, 2, 1, REM…etc
Sleep cycles=90 mins, more REM as the night progresses.
Why is REM sleep paradoxical?
REM= Rapid eye movement sleep, where most dreaming takes place. Body paralyzed during
REM, mind awake.
What happens when someone goes without sleep?
It depends on the person; some people need more sleep than others.
When people go without sleep experiments have shown: Increased errors on visual tasks,
suppression of the immune system, irritability, impaired communication, etc. After staying
awake too long, people will enter microsleeps (sleep for seconds at a time)
What are some of the proposed functions of sleep?