Question

which type of wave predominates during stage 1 nrem sleep?
a) theta
b) beta
c) alpha
d) delta

Explanation:

During stage 1 NREM (Non - Rapid Eye Movement) sleep, theta waves are predominant. Theta waves have a frequency range of 4 - 7 Hz. Alpha waves (8 - 12 Hz) are more prominent when a person is relaxed and awake with eyes closed. Beta waves (13 - 30 Hz) are associated with an alert, awake state. Delta waves (0.5 - 4 Hz) are dominant in deep (stage 3 and 4) NREM sleep.

Answer:

A. theta