question: I have memory issues. What is mild scattered periventricular an dsubcortical T2 intense white matter foci? I have quite a few migraines. I was prescribed Exelon 4.6 mg patch. I was 48 at the time of starting medication. Parent had mental issues but, have no idea what they were. Presently my memory issues are coming back. Recently started a job and was unable to remember from day to day how to utilize computer with instructions.