Hello momnlaw,
Welcome to NeuroTalk.

I'm sorry your daughter-in-law has been having such a difficult time. I hope that she can can get a correct diagnosis and ongoing treatment. Mark is correct in saying that some of the behaviours you mention could indeed by caused by a brain injury.

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Mark, there are a few... is this the Medscape article you mean?

http://www.medscape.com/viewarticle/829028
Medscape Medical News > Neurology
DTI Shows Brain Changes in Mild Head Injury
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http://www.medscape.com/viewarticle/765690
Medscape Neurology
Diffusion Tensor Imaging: A New Window Into Mild TBI

Adding on Medscape Registration page if needed to view articles.
https://profreg.medscape.com/px/registration.do
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Edited to add for reference -

NIH - News Article
http://www.ninds.nih.gov/news_and_ev..._biomarker.htm
Diffusion Tensor Imaging May Improve Diagnosis and Tracking of Mild Traumatic Brain Injuries
For release: Thursday, March 4, 2010