AP PSYCHOLOGY

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BIOLOGICAL BASES OF BEHAVIOR

BIOLOGY OF CONSCIOUSNESS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Looking at Ron’s brain scan during his sleep study we notice that he is experiencing sleep spindles and k complexes. He is most likely in what stage?
A
Stage 1
B
Stage 2
C
Stage 3
D
Stage 4
E
REM
Explanation: 

Detailed explanation-1: -Sleep spindles, a defining characteristic of stage 2 sleep, are brief, powerful bursts of synchronous ∼12–15 Hz neuronal firing in thalamocortical networks that occur most frequently late in the night.

Detailed explanation-2: -Stage 4/REM Although your body is completely at rest, electroencephalogram (EEG) readings indicate brain activity is similar to that of an awake person. Heart rate and blood pressure also increase, and your eyes also move erratically from side to side behind their eyelids. REM sleep is when most of your dreams occur.

Detailed explanation-3: -Sleep occurs in five stages: wake, N1, N2, N3, and REM. Stages N1 to N3 are considered non-rapid eye movement (NREM) sleep, with each stage a progressively deeper sleep.

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