Question
Alpha waves are seen during which of the following states?
| A. |
Sleep
|
| B. |
REM movements
|
| C. |
Relaxed state
|
| D. |
Active state
|
Show Answer
|
Correct Answer � C
Explanation
|
|
Alpha waves are brain waves that are typically seen when a person is in a calm and relaxed state, especially with their eyes closed but still awake. They are most prominent in the occipital lobe of the brain and have a frequency of 8-13 Hz.
They disappear during active or focused states (replaced by beta waves) and are not prominent during REM sleep.
- Sleep: During sleep, especially in deeper stages, theta and delta waves are more common.
- REM movements: During REM sleep, beta waves (high frequency) are seen, which are similar to the patterns observed in an active waking state.
- Active state: In an active or highly focused state, beta waves predominate.
