Refer to the figure. The figure shows electroencephalogram (EEG) recordings from a person who is awake and in different stages of sleep.Which of the following EEG recordings represents the period when bursts of action potentials fired by cells of the cortex are most synchronized over large areas, resulting in the slow-wave pattern?
A) Awake
B) Non-REM Stage 1
C) Non-REM Stage 2
D) Non-REM Stage 3
E) REM

Question

Refer to the figure.  The figure shows electroencephalogram (EEG) recordings from a person who is awake and in different stages of sleep.Which of the following EEG recordings represents the period when bursts of action potentials fired by cells of the cortex are most synchronized over large areas, resulting in the slow-wave pattern?
A) Awake 
B) Non-REM Stage 1 
C) Non-REM Stage 2 
D) Non-REM Stage 3 
E) REM

Quizplus · Accepted Answer

Non-REM Stage 3 represents the period of deep sleep when bursts of action potentials fired by cells of the cortex are most synchronized over large areas, resulting in the slow-wave pattern. The presence of delta waves (0.5-4 Hz) on the EEG recording indicates this stage of deep sleep. The EEG recordings during Awake, Non-REM Stage 1, Non-REM Stage 2, and REM do not show synchronized slow-wave patterns.

Refer to the Figure