The alpha rhythm is the most prominent EEG pattern when an adult is
A)In REM sleep
B)In non-REM sleep
C)Awake and relaxed with eyes open
D)Awake and thinking hard about something

Question

Quizplus · Accepted Answer

The alpha rhythm is a regular pattern of brain waves that occurs in awake and relaxed individuals with their eyes open. It is characterized by a frequency range of 8-13 Hz and is most commonly observed over the posterior regions of the brain. It is typically diminished or absent during mental activity, such as thinking hard about something, and is replaced by faster, desynchronized brain waves. The alpha rhythm is not present during sleep, whether it is REM or non-REM sleep.

The Alpha Rhythm Is the Most Prominent EEG Pattern When