PSY 1000 EXAM 2 STUDY GUIDE
--Everything of which we are aware at any given time, our thoughts, feelings,
sensations, and perceptions of the external environment.
Altered states of consciousness
--Changes in awareness produced by sleep, meditation, hypnosis, and drugs.
--The regular fluctuations from high to low points of certain bodily functions and
behaviors over a 24 hours period.
--When traveling, you reach your destination at a time when it is daylight there,
but it would have been time to go to sleep at the place you started.
Functions of sleep – restorative theory, circadian theory
—Being awake produces wear and tear on the body and the
brain, while sleep serves the function of restoring body and mind.
---Sleep evolved to keep humans out of harms way during the
dark of night, possibly from becoming prey for some nocturnal predator.
--A momentary lapse from wakefulness into sleep, usually occurring when a
person has been sleep-deprived.
--Sleep in which there are no rapid eye movement; heart rate and respiration are
slow and regular, there is little body movement, and blood pressure and brain
activity are at their lowest points of the 24-hour period.
REM sleep – what it is, why it’s important
--Is a type of sleep characterized by intense brain activity including rapid eye
movements, paralysis of large muscles, fast and irregular heart and respiration
rates, increased brain-wave activity, and vivid dreams.
--Researchers say that REM sleep aids in information processing, helping people
sift through daily experience, to organize and store in memory information that is
relevant to them.
--An increase in the amount of REM sleep that occurs after REM deprivation
--Often associated with unpleasant dreams or nightmares
--Alcohol, amphetamines, cocaine, and LSD suppress REM sleep, and withdrawal
from these drugs results in a REM rebound.
10. Sleep cycle – sequence of stages
---Transition stage between waking and sleeping
---Puts a person somewhat more deeply asleep and harder to awaken.
--As sleep gradually becomes deeper, brain activity slows, and more delta waves
appear in the EEG
---Entered when the EEG registers 20% delta waves; this is the
beginning of slow-wave sleep.