One of the four brain wave patterns, the delta state is typified by patterns that repeat at the speed of .5-3 Hertz (cycles per second). People in deep sleep or who are unconscious are in the delta state. It is also the speed of the brainwaves typified by some forms of very deep meditation. The other brain wave patterns are alpha, beta, and theta.
Written by author and journalist Heather Greene.
"This is my chance to say to all those who have touched my life Thank you, you have given me more than you will ever know."—Dolores Ashcroft-Nowicki, 2016
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