As I understand it, a lesion can form in any area of the brain. The number of lesions and which area of the brain they are differs with each MSer. This is the reason each person may have a set of symptoms different from other MSers.
Have a chat with your doctor to gain more insight on this topic. I hope this short answer was helpful.
The answer is it can affect all of the brain .. It was long thought that MS only affected certain areas of the brain but in the last few years my MRI's showed the MS affecting the Gray Matter.
My nuerologist confirmed this by do a Spectroscopy showing that indeed my MS was affecting the gray matter causing brain cells to die. I believe that this is important for MS patients to know and understand.
I have a slow progressive form of MS. Outwardly my gait was slightly affected and with the use of a cane I could walk. It also affected my muscles with much pain causing me to see a rheumotologist back in 2002 as there was no connection then with MS pain.
It also caused me to have memory loss in short term but my long term memory has yet o be affected. In 2011 I finally began treatment with Copaxone. I don't know if it is working. In the 12 years I have my MS I have had 3 relapses.
The third while on Copaxone. It came quicker but also left quicker leaving me with some fatigue and headaches. I believe that none of the medications do slow progression. I believe that MS is going to run it's course.
Those I know with MS have progressed very quickly when on these Meds and that they cannot "trick" this disease and may be more harmful than good. My first relapse came 5 years after I was diagnosed. The second 4.5 years and the third just this past month.
I believe it is heat that causes the flare ups. Stress is a huge factor as well. But the subject of affecting the gray matter for me is of concern. I can strengthen muscles. Eat right. Rest. Take medications for all symptoms BUT the loss of brain cells is yet to be determined. Simply cannot produce more brain cells.
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