Chapter 4 Flashcards
Consciousness
Awareness of internal and external stimuli, such as feelings of hunger and pain or detection of light.
Wakefulness
High levels of sensory awareness, thought, and behavior
Circadian Rhythms
Biological rhythm that occurs approximately 24 hours
Suprachiasmatic nucleus (SCN)
located in the hypothalamus, serves as the brain’s clock mechanism.
Sleep regulation
the brains control of switching between sleep as well as coordinating its cycle with the outside world
Jet Lag
symptoms resulting from the mismatch between our internal circadian cycles and our environment
Rotating shift work
A work schedule that changes from early to late on a daily/ weekly basis
Sleep debt
result of insufficient sleep on a chronic basis
Sleep rebound
a sleep deprived individual will tend to take a shorter time to fall asleep during subsequent opportunities
Brainwave activity can be visualized by using
EEG
Relatively low frequency, relatively high amplitude, synchronized
Alpha
Low frequency, low amplitude
Theta
Low frequency, high amplitude, desynchronized
Delta
Stage 1
Transitional phase occurs between wakefulness and sleep
Stage 2
the body goes into deep relaxation
Stages 3 and 4
Delta waves, know as slow-wave sleep
Sigmund Freud
saw dreams as a way to access the unconscious
collective unconsciousness
theoretical repository of information shared by all
people across cultures
Cataplexy
loss of muscle tone while awake or in some cases complete paralysis
of the voluntary muscles
Hypnagogic hallucinations
vivid, dream-like hallucinations
GABA
The GABA-gated chloride (Cl-) channel
is embedded in the cell membrane of
certain neurons
