My brain has been scrambled since I got fillings as a child. It was very bad those years, I had very little control over my thoughts, it made me feel suicidal. It is nothing like it was back then (which makes me think that recovery is possible) but I do have problems - my brain involuntarily counts steps, says numbers, mental repetitions, repeats words, causes blink compulsions and sometimes tic like symtoms, and just like you say a feeling of a wiring problem. I totally believe it's the mercury as I didn't have it before fillings. It comes and goes and some days is almost gone. I live in hope that it will go, but on the other hand I try not to build up expectation. I have no idea what damage has been done to my brain from 20 years of exposure since the age of about 10. But all cells in the body are replaced every 7 years, so I do think there is hope of improvement eventually.