> "scattered, punctate foci of FLAIR signal hyperintensity in the bihemispheric subcortical white matter"
Essentially a hyperintensity is how the radiologist refers to a white spot. The white spot indicates that the tissue has more water in it than the surrounding tissue, meaning that it's injured. The FLAIR sequence is best for showing things that are close to fluid areas (like the ventricles.)
This article explains a little of how an MRI works...
http://www.medhelp.org/health_pages/Multiple-Sclerosis/How-does-an-MRI-work/show/79?cid=36
It looks like we're taking head trauma more seriously than we used to. There's too many people turning up with neurological problems because of repeated head injury - boxers, football players, military...
I don't want to give you false hope, but neurological damage can heal. It takes a long time - anywhere from three months to 7 years. But the brain can be retrained to think around the deficiencies.