In brain wave frequencies, delta is the frequency range where the deepest stage of sleep occurs.

Delta is approximately .5 to 4 cps (cycles per second). While sleeping, a person will never reach 0 cps, or else they would be a vegetable and brain dead… literally.

Dreaming can occur in the higher states of delta. Rejuvenation and healing of the physical body happens while in the delta stage. Sometimes if you wake up and do not feel rested, your brain may have not reached delta, or may have spent a longer time than normal dreaming in theta.

The brain waves are of the LARGEST amplitude and   s l o w e s t  frequency in delta.

-back to Brain Wave Frequencies-

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