An interesting article about an MRI procedure than can identify changes after a concussion during PCS.

http://health.usnews.com/health-news...medium=Twitter

The informative paragraph is quoted below.
"This study found that communications and information integration in the brains of the people with post-concussion syndrome were disrupted among key default-mode network structures, and that the brain had to tap into different areas to compensate for this impaired function."