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Define sleep.
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Reversible state of perceptual disengagement from and unresponsiveness to the environment.
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How is sleep different from a coma?
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It is reversible, recurrent, and different physiologically.
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What is the function of sleep?
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Not sure, but thought to be to repair/rebuild neuronal synaptic populations
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T/F. Sleep affects only the brain.
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FALSE. It affects all organs of the body.
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T/F. Sleep deprivation disrupts biological rhythms.
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True.
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What are the 3 components of states of sleep?
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1. Behavioral2. Electorgraphic3. Neuronal state
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T/F. Within each state of sleep, there is ongoing variability and fluctuation of CNS activity.
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True.
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What are the 3 states of being?
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1. REM sleep2. Non-REM sleep3. Wake
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T/F. During REM and NREM sleep, the physiology of organs is changed from wakefulness.
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True.
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EEG state determination
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1) Wake - EEG is desynchronized, muscle tone (EMG) is variable 2) NREM sleep - EEG is synchronized, muscle tone is attenuated but present3) REM sleep - EEG is desynchronized, muscle tone is absent (paralysis)
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If we close our eyes while awake, what type of waves appear on the EEG?
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Alpha waves
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How many stages of NREM sleep are there?
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3- N1, N2, and N3
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What is "church sleep"?
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N1 stage of NREM sleep
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Characteristics of N1 sleep
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Theta waves, EEG slows down
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We spend most of the night in ________ sleep
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Stage N2 (NREM)
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