Five senses coupled with the five sense organs are the two sets of conduits that are driven by the brain which consist of numerous neurones. Experts vouch that this field called nervous system is still largely an unexplored terrain, but whatever little is known by scientific investigations is enough to tell us that brain is like an electrical circuit, pervaded by electrical energy.

Electroencephalography (EEG) is the recording of electrical activity along the scalp. EEG measures voltage fluctuations resulting from ionic current flows within the neurons of the brain. These flow patterns alter in states if activity, anxiety, sleep and relaxation. The patterns are called brain waves, classified as Alpha, Beta, Gama and Delta, which are identified in terms of patters and frequency to ascertain the tranquil or anxious or other states of mind.
In earlier times, tense or tranquil state of mind were terms considered as being more philosophical rather than material or scientific. That was so because man had not developed adequate scientific temper , better day science itself was not developed enough to generate the requisite insight in man.
Times have begun to change, as the chasm between the imperative pre-requisites of science and the fictional realities of the mysteries of mind are getting narrower, broadening human access into the realms that pseudo scientific prejudices tended to blur.