I may be wrong, and I often am, but it's my belief that a VEP is an investigation to confirm optic neuritis, and not a test specifically for brain wave activity.

An EEG, or electro-encephalograph, is a test which does show brain wave activity, and was used as one of the tests to confirm my own diagnosis.

is the one to confirm ms dx. not the VEP, sounds like VEP is specific only to optic neuritis, but EEG is an overall dx measure for ms.....

Tx for infor.

I have had both tests. The EEG was looking for seizures, it measures brain waves. The VEP was (from what I was told) to look for damage from Optic Neuritis. That one for me was slightly abnormal and I was not in a flare when it was done.

It is not a direct way to diagnose MS, but there really isn't one. But they are probably trying to find all of the info they can and compile it all together. With all the information of what they have found and what they have ruled out they can possibly confirm the MS.

I hope this helps.