Multiple choice

In humans, which brain waves pattern disappears entirely during sleep?

  1. Alpha waves

  2. Beta waves

  3. Theta waves

  4. Delta waves

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alpha waves (8-13 Hz) are present during relaxed wakefulness and disappear entirely during sleep. Beta waves (alert wakefulness) decrease but don't completely disappear. Theta and delta waves actually appear or increase during various stages of sleep.