Scientists have discovered that our brains operate in four levels of frequency- beta, alpha, theta and delta. Each level of frequency is measured in cycles per second, or hertz- hz.
Beta has the highest frequency, between 13 and 40 cycles per second. This is associated with our normal, everyday waking state. Beta helps in logical thinking, analysis, and active attention. Stress can throw the frequency to the higher ranges of beta.
Alpha operates between 8 and 13 cycles per second. This occurs during daydreaming, fantasizing and creative visualization. This is often associated with a deeply relaxed state, and with a light trance or meditation.
Theta operates between 4 and 8 cycles per second. Theta is associated with intuition, and allows us to access our subconscious. It is activated during dream sleep and deep meditational states. Theta is also associated with creative thinking, and allows us to tap into our inner genius.
Delta has the lowest frequency between 0.5 and 4 cycles per second. Delta is produced during deep sleep.