24. Stage 3 sleep is characterized by:

A. Beta waves
B. Delta waves
C. Sleep spindles
D. Rapid eye movements

Question

24. Stage 3 sleep is characterized by:

A. Beta waves
B. Delta waves
C. Sleep spindles
D. Rapid eye movements

BlackTom AI · Accepted Answer

Question restatement: Stage 3 sleep is characterized by:

Options:
A. Beta waves
B. Delta waves
C. Sleep spindles
D. Rapid eye movements

Option A: Beta waves. These are typically associated with wakeful rest and active alertness, not deep sleep. In sleep studies, beta activity is linked to an awake or REM-like state, so this choice mislabels the EEG pattern of stage 3.

Option B: Delta waves. Delta waves are slow, high-amplitude brain waves that dominate deep non-REM sleep (N3), also known as slow-wave sleep. This is the hallmark EEG feature of stage 3, aligning with the classic understanding of deep sleep physiology.

Option C: Sleep spindles. Sleep spindles are brief bursts of sigma frequency activity that occur primarily during stage 2 non-REM sleep. They indicate lighter sleep depth compared to stage 3, so this option points to the wrong stage.

Option D: Rapid eye movements. Rapid eye movements occur during REM sleep, not during stage 3 non-REM sleep. REM is associated with desynchronized EEG activity and vivid dreaming, distinguishing it from deep slow-wave sleep described by delta activity.

Additional reflection: Recognizing stage 3 sleep hinges on identifying the presence of delta waves and the overall move toward deep, restorative sleep. Other options either refer to wakefulness (beta), lighter non-REM features (spindles in stage 2), or REM characteristics (eye movements), which do not describe stage 3.

202570_PSYC3_73232 Final Exam: Part ONE A Multiple Choice (Remotely Proctored)

24. Stage 3 sleep is characterized by: A. Beta waves B. Delta waves C. Sleep spindles D. Rapid eye movements

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