Hi Jenng,
I was also confused as to why I even needed a brain MRI. I believe it's because I have a serious gait problem or maybe the Neuro Dr was checking if my brain is talking to my body correctly for nerve signals & pain generators or because I have a bladder problem that involves nerve damage or possibly to check for MS. Right now I'm not sure because I'm having so many issues after I had my lumbar surgery. Maybe it's because there may be nerve damages in different areas caused from the surgery.

Any insight or advice or thoughts are very welcome