The scientific idea of brainwaves has made its way into popular media as can be witnessed in art, movies and science fiction. The image of a person with electrodes on his scalp while his brainwaves are being recorded is almost as iconic as the symbol of the atom or the depictions showing the ascent of man according to evolution. Yet very few people are aware of the fact that our brainwaves can be altered and, more importantly, by shifting into different states of brainwave activity, we can swiftly change our state of consciousness — say from one of anxiety to one of deep calm and openness — and by doing so, we also shift our emotional and physical state as it corresponds to that brainwave level. This is an idea which deeply fascinates me and intrigues me.
Short waves and long waves
The brain produces electric impulses. These impulses can be recorded by devices such as EEGs, fMRIs and others and are shown as waves of varying speeds or frequencies. The speed of the brainwaves are measured in Hertz (cycles per second). There are four general categories of brainwave levels: The Beta, Alpha, Theta and Delta.