“They are slower in frequency than the beta waves that dominate our ... have a frequency in the range of 4-7.99hz. “Theta waves are slower than alpha waves and signify the first stage of ...

Beta waves (13-16 Hz) occur when we are awake and alert. Alpha waves (8-12 Hz) happen when we are relaxed with eyes closed, as in meditation. Theta waves (4-7 Hz) are common in the lighter stages ...