4.1-4.3 Flashcards
(26 cards)
is a person’s awareness of everything that is going on around him or her at any given moment.
Consciousness
a state in which thoughts, feelings, and sensations are clear, organized, and the person feels alert.
Waking consciousness
a state in which there is a shift in the quality or pattern of mental activity as compared to waking consciousness.
Altered State of Consciousness
a cycle of bodily rhythm that occurs over a 24-hour period.
Circadian Rhythm
circa
about
diem
day
tiny section of the brain that innfluences that glandular system.
Hypothalamus
deep within the hypothaalamus; the internal clock that tells people when to wake up and when to fall asleep.
Suprachiasmatic Nucleus
brief sidesteps into slep lasting only a few seconds.
Microsleeps
any significant loss of sleep, resulting in problems in concentration and irratability.
Sleep deprivation
theory of sleep proposing that animals and humans evolves sleep patterns to avoid predators by sleeping whenn predators are most active.
Adaptive theory
theory of sleep proposing that sleep is necessary to the physical health of the body and serves to replenish chemicals and repair cellular damage.
Restorative Theory
allows scientists to see brain wave activity as a person passes through the various stages of sleep and to determine what type of sleep the person has entered.
Electroencephalograph (EEG)
brain waves that indicate a state of relaxation or light sleep.
Alpha waves
brain waves indicating the early ages of sleep.
Theta waves
long, slow waves that indicate the deepest stage of sleep.
Delta waves
stage of sleep in which the eyes move rapidly under the eyelids and the person is typically experiencing a dream.
Rapid Eye Movement (REM)
any of the stages of sleep that do not include REM.
NREM (non-REM) sleep
light sleep. May experience:
Non-REM Stage One
vivid visual events.
Hypnagogic Images
knees, legs, or whole body jerks.
Hypnic Jerk
sleep spindles (brief burst of activity only lasting a second or two).
Non-REM Stage Two
delta waves pronounced.
Non-REM Stages Three and Four
when 50%+ waves are delta waves.
Deep sleep
