<b>Healthy Delta</b><br><p><span><span style=""><b style=""><u style="">Delta rhythm</u></b></span></span> is a brainwave that is most commonly seen in deep dreamless sleep (NREM 4) in healthy adults and children. It is also a dominant brainwave in infants, since the earliest stages of life are times of, one, a lot of sleep, and two, neurogenesis and angiogenesis. Young brains form, develop and grow with the production of delta. Although usually thought of as being associated with sleep and parts of the brain being “off line,” taking up nourishment, delta activity is always present in normal EEG’s of any age.&nbsp; It is generated cortically and inhibited by afferent stimulation of the cortex.&nbsp;</p><p>There is a substantial QEEG literature relating delta power to higher order mental functions in normal awake humans.&nbsp; Increased delta activity has been observed in normal subjects performing calculations, taking reaction time tests, and thinking abstract thoughts.&nbsp; Delta is thought to have a functional role in allocating attention to internal mental representations, by suppressing extraneous cortical inputs and facilitating internal concentration. Anterior lead voltage in awake subjects is 20%-30% delta.&nbsp; &nbsp;</p><p><br></p><p><img src="@@PLUGINFILE@@/healthy-delta.png" alt="Healthy Delta" width="513" height="381" class="img-responsive atto_image_button_middle"><br></p>