<p>The summary pages of many QEEEG reports give an overall view of the goings on from a neurophysiological perspective. Each column contains the activity for one bandwidth (delta, theta and so on). Each row contains a separate metric. The colors indicate how many standard deviations, or Z-scores, the client is from the normal population. The thickness of the lines also depicts deviance in Z-score measures. Absolute Power is the total voltage, or energy, that the brain is emitting, measured in disparate frequencies and typically portrayed after processed via a “normative database.” Relative Power is 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>Coherence is 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. Phase is 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; the metrics of phase are very similar to coherence and will be discussed further in the document.</p><p>As mentioned previously, the instantaneous Z scores are much smaller than the FFT Z scores in&nbsp; NeuroGuide TM which uses the same subjects for the normative database.&nbsp;&nbsp;</p><p><br></p><p style="text-align: center;"><img src="@@PLUGINFILE@@/quantitative-database.png" alt="A summary Page from a Quantitative Database (NeuroGuide)" width="716" height="955" class="img-responsive atto_image_button_text-bottom"><br></p><p style="text-align: center;">Figure : A summary Page from a Quantitative Database (NeuroGuide)<br></p><p style="text-align: center;"><br></p><p style="text-align: center;"><img src="@@PLUGINFILE@@/quantitative-database-skil.png" alt="Figure : A summary Page from a Quantitative Database (NeuroGuide)" width="729" height="453" role="presentation" class="img-responsive atto_image_button_text-bottom"><br></p><p style="text-align: center;">Figure : A summary page from a Quantitative Database (SKIL)<br></p><p style="text-align: center;"><br></p><p style="text-align: center;"><img src="@@PLUGINFILE@@/individual-bins-skil.png" alt="" width="638" height="332" role="presentation" class="img-responsive atto_image_button_text-bottom"><br></p><p style="text-align: center;">Figure : A Summary Page of Individual Hz bins in SKIL<br></p><p style="text-align: center;"><br></p><p style="text-align: center;"><br></p>