<p>The differences in absolute and relative power are differences between the total voltage, or energy, that the brain is emitting, measured in disparate frequencies and typically portrayed after processed via a “normative database” (absolute power) and the measure of clients’ EEGs, viewed in relation to their absolute power profile, used to determine what may be deviant, in relative terms (relative power).&nbsp; Relative maps are subject-specific, in the sense that we are witnessing the deviances (and excesses) in and of the client, taking into account the particulars of the subject’s overall amplitudes.</p><p>Relative power is especially telling when a client is low amplitude overall, or high amplitude overall. In the next figures, we see an individual who has a high amplitude EEGs—meaning that the overall voltage that their brain emits is larger than their same aged peers, in every bandwidth. In this case, we can see in what frequency band they spend the most time.</p><p>Because the absolute power row is high voltage (2+ Z-scores above the norm in every frequency bin) we have to use the relative power rows to determine where this person has the most energy allocated. In the image we can see that the client spends the most time (relatively) in the alpha band and the least amount of time in the delta range.</p><p><br></p><p style="text-align: center;"><img src="@@PLUGINFILE@@/aap-eeg.png" alt="High Amplitude Absolute Power EEG" width="560" height="721" class="img-responsive atto_image_button_text-bottom"><br></p><p style="text-align: center;">High Amplitude Absolute Power EEG<br></p><p style="text-align: center;"><br></p><p style="text-align: left;">In the next figure, we see an EEG that is low voltage, overall. We can see that the client is 1-2+ standard deviations low in every bandwidth. When looking at relative power, we learn that the balance of his EEG is quite good—he is spending similar amounts of time in all five bandwidths measured.&nbsp;<br></p><p style="text-align: left;"><br></p><p style="text-align: center;"><img src="@@PLUGINFILE@@/voltage-eeg.png" alt="Low Voltage EEG" width="560" height="739" class="img-responsive atto_image_button_text-bottom"><br></p><p style="text-align: center;">Low Voltage EEG<br></p><p style="text-align: center;"><br></p>