Chapter 4 Flashcards
Consciousness
Consciousness
Persons awareness of everything around them
Waking state of consciousness
Thoughts, feelings, and sensations are clear and organized and the person feels alert
Altered state of consciousness
There is a shift in the quality or patterns of mental activity as compared to waking consciousness
Circadian rhythm
Sleep-wake cycle of bodily rhythm that occurs over a 24 hr period controlled by hypothalamus
Sleep deprivation
Any significant loss of sleep resulting in issues in concentration and irritability (acute or chronic)
Microsleep
Brief lapses into sleep that only last a few seconds
Adaptive theory
Animals and humans evolved sleep patterns to avoid predators by sleeping when predators are most active
Restorative theory
Sleep is necessary for the physical health of the body and replenishes chemicals and repairs cellular damage
Rapid eye movement sleep (REM)
Stage of sleep in which eyes move rapidly under eyelids, person is typically dreaming, and voluntary muscles are inhibited
Non-rapid eye movement sleep (nREM)
Any sleep stage that does not include REM
Beta waves
Small, fast waves that indicate most mental activity as someones in waking state of consciousness
Alpha waves
Waves present as someone gets more relaxed or drowsy
nREM 1
Light sleep as muscle activity slows; theta waves
nREM 2
Muscle activity and temp continue lowering; theta waves and sleep spindles (brief bursts of activity)
nREM 3
Deep sleep when growth hormones are released; slow, large delta waves
REM behavior disorder
Rare disorder where mechanism that blocks the movement of the voluntary muscles fail, allowing the person to thrash around and even get up and act out nightmares
Sleep paralysis
Inability of voluntary muscles to move during REM sleep
REM rebound
Increased amounts of REM sleep after being deprived it