AP Psychology Quiz
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BIOLOGICAL BASES OF BEHAVIOR
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A sleeper's EEG shows sleep spindles and K-complexes. Which stage is being recorded?
A
REM sleep, because spindles and K-complexes indicate vivid dreaming with rapid eye movements and muscle atonia similar to wakefulness.
B
NREM-2 sleep, identified by sleep spindles and K-complexes; this stage makes up a large portion of total sleep time.
C
NREM-3 sleep, because delta waves define deep sleep; spindles and K-complexes are replaced by high-amplitude slow activity.
D
NREM-1 sleep, because theta waves and hypnagogic imagery define the stage; spindles and K-complexes are not typical markers.
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