BIOLOGICAL BASES OF BEHAVIOR
BIOLOGY OF CONSCIOUSNESS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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stage 1
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stage 2
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stage 3
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REM
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Detailed explanation-1: -The second stage of NREM sleep on EEG shows theta waves, which, along with K-complexes and sleep spindles, are the defining characteristics of this stage. Any abnormalities in these waveforms are therefore picked up on EEG.
Detailed explanation-2: -Sleep spindles may be present in all stages of NREM, but they are most prevalent in stage 2 sleep.
Detailed explanation-3: -They manifest as soon as we leave the transitionary state of sleep onset and enter the light phases of NREM sleep. From then on, they are generated regularly about every 3 to 6 seconds. Spindles occur during both light NREM sleep and deep slow-wave sleep, but not during REM sleep.
Detailed explanation-4: -Stage II is the predominant sleep stage during a normal night’s sleep. The distinct and principal EEG criterion to establish stage II sleep is the appearance of sleep spindles or K complexes. The presence of sleep spindles is necessary and sufficient to define stage II sleep.
Detailed explanation-5: -Sleep spindles begin to occur during Stage 2 sleep.