STATES OF CONSCIOUSNESS
DREAMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Stage 4-delta waves
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Stage 2-sleep spindles/ K complexes
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Stage 1-alpha waves
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Awake (relaxed and drowsy)-alpha waves
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Detailed explanation-1: -The early portion of stage 1 sleep produces alpha waves, which are relatively low frequency (8–13Hz), high amplitude patterns of electrical activity (waves) that become synchronized (Figure SC. 8). This pattern of brain wave activity resembles that of someone who is very relaxed, yet awake.
Detailed explanation-2: -The wave is characteristic of stage 1 sleep. Solution: The correct answer is Alpha wave. Sleep consists of two cycles, NREM (non-rapid eye movement) and REM (rapid eye movement) cycles. The NREM cycle is divided into 4 stages and the 1st stage is characterized by the presence of alpha waves.
Detailed explanation-3: -Stage 1. Stage 1, also called N1, is essentially when a person first falls asleep. This stage normally lasts just one to seven minutes. During N1 sleep, the body has not fully relaxed, though the body and brain activities start to slow with periods of brief movements.
Detailed explanation-4: -As a person transitions from being awake to falling asleep, alpha waves are replaced by theta waves. Sleep spindles and K-complexes emerge in stage 2 sleep. Stage 3 and stage 4 are described as slow-wave sleep that is marked by a predominance of delta waves.