12/3/2024 11:27AM
States of Consciousness Exam Questions
With Correct Answers
Consciousness - answer✔an awareness of ourselves and our environments
circadian rhythm - answer✔the biological clock; regular bodily rhythms (for example, of
temperature and wakefulness) that occur on a 24-hour cycle
suprachiasmatic nucleus (SCN) - answer✔a pair of cell clusters in the hypothalamus that controls
circadian rhythm. In response to light, it causes the pineal gland to adjust melatonin production,
modifying feelings of sleepiness.
REM sleep - answer✔rapid eye movement sleep, a recurring sleep stage during which vivid
dreams commonly occur; also known as paradoxical sleep because muscles are relaxed but body
is active
alpha waves - answer✔the relatively slow brain waves of a relaxed, awake state
sleep - answer✔Periodic, natural, reversible loss of consciousness - as distinct from
unconsciousness resulting from a coma, general anesthesia, or hibernation
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12/3/2024 11:27AM
hallucinations - answer✔false sensory experiences, such as seeing something in the absence of
an external visual stimulus
NREM-1 - answer✔the transition into sleep, marked by slowed breathing and irregular brain
waves; hypnagogic sensations/hallucinations, and myclonic jerks may occur
NREM-2 - answer✔Sleep stage characterized by its periodic sleep spindles, or bursts of rapid,
rhythmic brain-wave activity. About half the night is spent in this phase.
NREM-3 - answer✔sleep stage that lasts about 30 minutes and your brain emits large, slow delta
waves, and you are hard to awaken.
delta waves - answer✔the large, slow brain waves associated with deep sleep
sleep spindles - answer✔bursts of rapid, rhythmic brain wave activity characteristic of stage 2
sleep
paradoxical sleep - answer✔another term for REM sleep; refers to the constrast between high
amounts of brain activity and low amounts of bodily (muscle) activity
insomnia - answer✔sleep disorder characterized by recurring problems in falling or staying
asleep
narcolepsy - answer✔a sleep disorder characterized by uncontrollable sleep attacks. The sufferer
may lapse directly into REM sleep, often at inopportune times