What is the frequency of Alpha waves?

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Prepare for the AASM Sleep Technologist Test. Enhance your knowledge with flashcards and multiple-choice questions, each offering hints and detailed explanations. Get confident for your exam!

Multiple Choice

What is the frequency of Alpha waves?

Explanation:
Alpha waves are the brain rhythm seen when a person is awake and relaxed with the eyes closed, and their frequency is about 8 to 13 cycles per second. This 8–13 Hz range is most commonly recorded over the occipital region and tends to diminish when the eyes are opened or when mental activity increases. That makes this frequency band the characteristic marker of alpha activity, distinct from theta (roughly 4–7 Hz), delta (0.5–4 Hz), and beta (above 13 Hz). So the frequency of Alpha waves is 8–13 Hz.

Alpha waves are the brain rhythm seen when a person is awake and relaxed with the eyes closed, and their frequency is about 8 to 13 cycles per second. This 8–13 Hz range is most commonly recorded over the occipital region and tends to diminish when the eyes are opened or when mental activity increases. That makes this frequency band the characteristic marker of alpha activity, distinct from theta (roughly 4–7 Hz), delta (0.5–4 Hz), and beta (above 13 Hz). So the frequency of Alpha waves is 8–13 Hz.

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