sleep and health Flashcards
what is the definition of sleep?
a state of unconsciousness from which we can be “aroused” by sensory or other stimuli
what is the definition of a coma?
a state of unconsciousness from which one can not be aroused by external stimuli
what is rem?
rapid eye movement, sleep that occur in intervals at night
what are the four reasons why we sleep?
- rest and restore from our hyperactive state
- heal and activate the immune system, save energy
- learn and memory consolidation
- dream
how can we measure sleep in laboratory settings?
- muscle tone
- summated brain wave activity
- eye movements
for summated brain wave activity define awake, eyes closed, and sleep/dreaming
awake = beta activity
eyes closed = alpha activity
sleep/dreaming = delta/theta
what are some research limitations for sleep?
correlation, inability to manipulate sleep, temporal lag of effects or immediate strong effects, lower number of long-term effect studies
when we have mental activity while asleep, what parts of the brain have high versus low blood flow?
high blood flow = visual association cortex
low blood flow = inferior frontal cortex
how long are sws/rem cycle and circadian rhythms? what are they set by?
90 minutes, ~24 hours, biological clock (suprachiasmatic nucleus)
what is non-24-hour sleep-wake syndrome? and who is most at risk?
blind patients
what is REM sleep behavioral disorder? and who is it most common in?
elderly men
what are some sleep-wake disorders?
insomnia, hypersomnelence, narcolepsy, breathing-related disorders, parasomnias, restless legs syndrome, etc
what are the symptoms of insomnia?
habitual sleeplessness, inability to sleep
what is narcolepsy?
irresistible sleep, attacks of cataplexy, sleep paralysis, and hypnagogic hallucinations
what is a circadian rhythm disorders?
biological and environmental clock d not align
