Five brain-wave patterns include:

  • Delta – slow (during sleep
  • Theta – slow (daydreaming, relaxing)
  • Alpha – during relaxed states
  • Sensorimotor rhythm or SMR – during states of focused relaxation
  • Beta – fast (occurring during concentration or mental work states)

(Amen, Daniel G., MD. Change Your Brain Change Your Life. p 142-143. NY:Times Books, 1998