Another kind of workup regarding brain issues is a "neuropsych" exam. Performed by a neuropsychologist, this tests your comprehension, response times, and lots of other things that involve brain function. I found it provided quite a wealth of information - and was quite helpful when was applying for disability.
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2002DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde