When I had my EMG and the other electrical stimulus test (I forgot the name just now) the doctor asked where I was the weakest. At the time it was my right hand and left side of my face. My right hand and left side of my face were tested. Made sense to me.

Maybe you should talk to the doctor performing these tests about your concerns. It makes sense to test the weak muscles since we all have different muscles that get weak due to MG. What point is there in testing a muscle that works fine?

I just gained understanding as to why my doctor waited until after these tests to prescribe Mestinon to me. I don't know if I could stop taking Mestinon to "prepare" for a test at this point. Mestinon is such a life saver and I would be afraid to stop taking it.

I hope your test goes well.