EPSILON (below 0.5 Hz) Consciousness researcher Dr. Jeffrey Thompson altered conventional EEG equipment to study the extraordinary states of consciousness of seasoned meditators and yogis. He later decided to call one of the uncommon states of consciousness he discovered “Epsilon”—a brainwave pattern even slower than delta. Dr. Thompson measured the range of this pattern to be from below 0.5 Hz (or cycles per second) to as low as one quarter cycle every ten seconds. He also discovered properties of this pattern that led him to believe it to be a carrier wave for the ultra-fast brainwave patterns he observed in other expert meditators, patterns as fast as 200 Hz or more, suggesting a curious circular relationship between the fastest and slowest possible ranges. [source: iAwakeTechnologies.com]