When my neuro did my SFEMG, we already knew I was seroneg. She did the SFEMG and at one point said, ' I hate it when this happens. MG is supposed to be a jitter of 6 - 10 and you are only 5.7. But I don't care - I know you have MG and I'm going to treat for it.'

So exactly what the measurement is, I don't know - - but I remember she said it should be 6 - 10 for and MG diagnosis.

Hope this helps a bit - - I'm really sorry you are having such trouble with dx.
Sue