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

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

Quizplus · Accepted Answer

As a person becomes drowsy, beta waves (associated with wakefulness) are gradually replaced by alpha waves (associated with relaxation). As the person enters the first stage of sleep, alpha waves are replaced by theta waves (associated with light sleep).

You Are Watching Sleep Researchers Monitor the Sleep of a Normal