Neurobiology Basics: Posterior Cingulate Cortex

The Posterior Cingulate Cortex¬†forms a central node in the “default mode network” of the brain. The PCC along with the precuneus is implicated as a neural substrate for human awareness. In numerous studies on attention and awareness, the PCC has been found to be activated during self-related thinking. Distracted and controlled awareness corresponded with PCC activation.

Neurobiology Basics: Anterior Cingulate Cortex

The anterior cingulate cortex is speculated to monitor and control the attention and impulse centers of the brain. It is frontal part of the cingulate cortex which resembles a collar. It effectively keeps us motivated and on task. This is where the primary and secondary motor cortices are located. They control movement and activity. Children with ADD/ADHD often exhibit difficulty in understanding the consequences of their behavior.  Research has also shown that the ACC is correlated with emotional awareness.

Default Mode Network

New research out of MIT talks about how the Default Mode Network in the brain is synchronous during inactive states. The normal synchrony pattern in adults who have recovered from ADD as a child demonstrate marked synchrony in the DFN. Previous research showed that two major hubs – the posterior cingulate cortex and the medial prefrontal cortex no longer synchronize. The task positive network is also suppressed when the DFN is active in individuals with ADHD. There is in essence a thinking brain and a feeling brain. In this study 35 people ere sampled.