<p><b>Absolute Power:</b> The total voltage, or energy, that the brain is emitting, measured in disparate frequencies and typically portrayed after processed via a “normative database.”</p><p><b>Amplitude:</b> The height of the brainwave, measured in microvolts squared.&nbsp;</p><p><b>Asymmetry:</b> is the absence of, or a violation of, symmetry or the lack of balance.</p><p><b>Coherence:</b> The stability of phase relationship between any two areas of the brain. Two areas are said to be coherent if they have constant respective relative phase. Coherence in excess is hypercoherence; coherence in deficiency is hypocoherence.&nbsp;</p><p><b>Common mode rejection:</b>&nbsp; The input amplifier is more sensitive in relation to the signal components that are different at the electrodes than to those components that are of equal amplitude and polarity. It indicates the ability of the amplifier to accurately cancel voltages that are common to both inputs.</p><p><b>Complex Adaptive System</b></p><p>The statistical properties of the brain’s dynamics reflect the statistics of the environment , this is because our brain is a complex adaptive system (CAS) which arises when two conditions are fulfilled: 1) structure has small world topology and 2) the presence of noise (variability)—the brain is a complex adaptive system.&nbsp;</p><p><b>Fast Fourier transforms:</b> The fast Fourier transform is a mathematical method for transforming a function of time into a function of frequency. Sometimes it is described as transforming from the time domain to the frequency domain. It is very useful for analysis of time-dependent phenomena. FFT’s are of great importance to digital signal processing in EEG applications.</p><p><b>Frequency: </b>How many waves are made per second interval, represented in hertz (Hz), or cycles per second.</p><p><b>Phase:</b> Any one point or portion in a recurring series of changes, as in the changes of motion of one of the particles constituting a wave or vibration.</p><p><b>Relative Power:</b> A measure of clients’ EEGs, viewed in relation to their absolute power profile, used to determine what may be deviant, in relative terms.&nbsp;</p><p><b>Symmetry: </b>Generally conveys two primary meanings. The first is an imprecise sense of harmonious or aesthetically-pleasing proportionality and balance; such that it reflects beauty or perfection. The second meaning is a precise and well-defined concept of balance or "patterned self-similarity" that can be demonstrated or proved according to the rules of a formal system: by geometry, through physics or otherwise.</p>