You are watching sleep researchers monitor the sleep of a normal adult. The participant is hooked up to an EEG. What brain waves would you observe as the person becomes drowsy and then enters the first stage of sleep?
A) alpha eventually replaced by delta
B) delta eventually replaced by theta
C) beta eventually replaced by alpha
D) delta eventually replaced by beta

Question

Quizplus · Accepted Answer

As a person becomes drowsy and enters the first stage of sleep, the high-frequency beta waves observed during wakefulness are replaced by the slower alpha waves. This transition marks the shift from being awake to the relaxed state just before sleep begins.

You Are Watching Sleep Researchers Monitor the Sleep of a Normal