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) alpha eventually replaced by irregular
D) delta eventually replaced by beta

Question

Quizplus · Accepted Answer

As a person becomes drowsy and enters the first stage of sleep, alpha waves, which are associated with relaxation and a wakeful state, are eventually replaced by more irregular, lower frequency theta waves. This transition marks the shift from wakefulness to the initial stage of sleep.

You Are Watching Sleep Researchers Monitor the Sleep of a Normal