BIOLOGICAL BASES OF BEHAVIOR
STUDYING THE BRAIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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EEG
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ERP
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Either A or B
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None of the above
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Detailed explanation-1: -In the deepest level of sleep, stage IV sleep, the predominant EEG activity consists of low frequency (1–4 Hz), high-amplitude fluctuations called delta waves, the characteristic slow waves for which this phase of sleep is named. The entire sequence from drowsiness to deep stage IV sleep usually takes about an hour.
Detailed explanation-2: -The basic recordings done during a sleep study may include: Electroencephalography (EEG) . This measures brain wave activity. Electrooculogram (EOG). This measures eye movement.
Detailed explanation-3: -Indeed, they distinguished two groups of delta waves occurring during REM sleep: slower (<2 Hz) waves, recorded in medial-occipital regions, present in both NREM and REM sleep, and faster (2.5–3 Hz), REM-sleep-exclusive, fronto-central/occipito-temporal “sawtooth” waves.
Detailed explanation-4: -During most stages of sleep, the thalamus becomes quiet, letting you tune out the external world. But during REM sleep, the thalamus is active, sending the cortex images, sounds, and other sensations that fill our dreams.