<p></p><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.<b> </b></p>

<p><b>Asymmetry:</b> is the absence of, or a violation of,
symmetry or the lack of balance.</p>

<p><b>Coherence:
</b><a name="_Hlk484153241">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. </a></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. </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. </p>

<p><b>Symmetry:</b> Generally conveys two primary meanings. The first
is an imprecise<b> </b>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><br><h4></h4><br><p></p>