<p>Brodmann area 23 is part of the posterior cingulate cortex. This area is also known as ventral posterior cingulate area 23. The PCC is a highly connected node in the brain. This is a fundamental area of intersection for all of the networks in the brain to convene and converge into what is called the rich club. The name “rich club” is analogous to social systems, where highly central individuals— being rich in connections—form a highly interconnected club (Zhou &amp; Mondragon, 2004). Rich clubs are very similar to the substation system in power grids. The substations are there to facilitate the transmission of power, disseminating loads at appropriate intervals to conjoining substations, allowing for the ease of transmission and the prevention of system failure.</p><p>The PCC mediates the person’s recognition of the existence in space. The precuneus is here and it may hold a good deal of a person’s autobiographical memory, and in that, her sense of identity. This area is poorly infused with blood in fMRI studies of the DMN in patients with developmental trauma. The DMN networks cycle at .1 hz.&nbsp;</p><p style="text-align: center;"><img src="@@PLUGINFILE@@/ba-23.png" alt="BA 23" width="258" height="394" class="img-responsive atto_image_button_text-bottom"><br></p>