STATES OF CONSCIOUSNESS
DREAMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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This stage is strongly associated with REM activity.
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You would expect the brain to have strong delta waves during this stage.
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The sleeper may be easily awakened from this stage.
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None of the above
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Detailed explanation-1: -Stage 3 sleep is also known as N3 or deep sleep, and it is harder to wake someone up if they are in this phase. Muscle tone, pulse, and breathing rate decrease in N3 sleep as the body relaxes even further. The brain activity during this period has an identifiable pattern of what are known as delta waves.
Detailed explanation-2: -Stage 3 is often referred to as deep sleep or slow-wave sleep because this stage is characterized by low frequency (less than 3 Hz), high amplitude delta waves (Figure SC. 10). During this time, an individual’s heart rate and respiration slow dramatically.
Detailed explanation-3: -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-4: -While the first two stages of the sleep-wake cycle are classed as light sleep, the third stage is much deeper 1. Deep sleep is sometimes known as ‘slow-wave sleep’ because of the long, slow delta waves produced by our brains during these final two sleep stages 5.