Uh, yeah. I have memory problems. I'm on Mestinon and Topamax for Migraines. Some of my memory problems can be attributed to the Topamax. But, even when I got OFF of the Topamax for about 6 months, I STILL had some memory problems. There ARE studies that say that MG can cause Cognitive Deficits. Other studies say that it does not.

http://www.ncbi.nlm.nih.gov/pubmed/15717109

http://www.ncbi.nlm.nih.gov/pubmed/10561522

http://www.ncbi.nlm.nih.gov/pubmed/9261464

http://www.ncbi.nlm.nih.gov/pubmed/8780106

http://www.ncbi.nlm.nih.gov/pubmed/7625152

http://www.ncbi.nlm.nih.gov/pubmed/8445405

I found these at: http://www.ncbi.nlm.nih.gov/pubmed by typing "memory myasthenia gravis" in the search field.