'Alpha waves occur when you're relaxed with eyes closed; beta, when alert; these waves, when in deep sleep'
delta waves
THE BIG SLEEP: Alpha waves occur when youre relaxed with eyes closed; beta, when alert; these waves, when in deep sleep
Alpha waves occur when you're relaxed with eyes closed; beta, when alert; these waves, when in deep sleep
Alpha waves occur when you're relaxed with eyes closed; beta, when alert; these waves, when in deep sleep
THE BIG SLEEP
delta waves
THE BIG SLEEP