Question

105. Before entering sleep, you briefl y pass through a relaxed and drowsy state.

Th is is marked by which characteristic?
(A) Beta waves
(B) Delta waves
(C) Alpha waves
(D) Th eta waves
(E) Zeta waves

Answer 1

The relaxed and drowsy state just before entering sleep is marked by alpha waves, which have a low frequency of 8-12 Hz and signify a deeply relaxed state.

Step-by-step explanation:

Before entering sleep, you briefly pass through a relaxed and drowsy state marked by characteristic alpha waves. These brain waves have a frequency of 8-12 Hz and resemble the activity of someone who is very relaxed yet awake, with more synchronization and higher amplitude than beta waves, which are characteristic of wakefulness.

As an individual progresses into stage 1 sleep, there is an increase in theta wave activity, which are even lower in frequency (4-7 Hz) and higher in amplitude than alpha waves. It is fairly easy to awaken someone from this stage of sleep.