As prior research out of MIT (Go, Go, Go and Slow, Slow, Slow?), research out of Oregon Health Sciences University (OHSU) recently examined the coordination between two brain networks: the task positive network(s) and the default mode network. These networks have largely opposite functions. In the first–task positive network(s)–there’s increased activity when we have a particular task that demands focus, letting us start and sustain attention on the task. In the second–the default mode network–there’s increased activity when we have no particular task to do. In adults without ADHD, per the MIT research, these two networks cooperate: When it’s time for one to get on stage, the other fades into the background. In adults with ADHD, these networks are uncooperative and can compete for attention at the same time.
In children with ADHD, according to the results of the OHSU study (here), we see the same lack of coordination/cooperation between the networks as compared to children without ADHD, with this lack of coordination between networks increasing with age.
The result? Mixed signals. Attentional interference. Or, as the researchers put it, decreased attentional control. A reminder that behavior reflects brain activity, coordinated or otherwise.
Of interest, the OHSU researchers found that the brains of female children overall, with or without ADHD, showed more coordination between the opposing networks than the brains of male children.