Epsilon, Gamma, HyperGamma, Lambda Brainwave Activity and Ecstatic States of Consciousness (article)
Dr. Jeffrey D. Thompson, D.C., B.F.A.
Brain mapping research studies into different brainwave patterns associated with different states of consciousness has been carried out in major centers throughout the country. The normal range of brainwave frequency activity in the cortex neurons has traditionally been from 0.5 Hz Delta to 30.0 Hz Beta. Most of the early brainwave research was concerned with sleep studies. From these studies, it became accepted brainwave nomenclature to associate Beta activity with externally directed linear thinking mental activity, Alpha activity with internally directed non-linear mental activity, Theta with dreaming sleep, emotional elements and experiences and Delta with the deepest and most physically restorative portion of sleep.