I am being watched for some time to see if my myasthenia has returned. My eye is evident for ptosis and my right arm on testing the right one after a few seconds began drooping. My neurologist had extra time two days ago, so we did an EMG. It was negative. Now, my myasthenia is a mild case and my neurologist and I are pleasant to each other. I am wondering is it correct, is it black and white, negative EMG, negative myasthenia at least for the arm?
Well, I think that answer cold be yes and no, you know it is difficult to have black and white in medicine, although we wish to. There are two kinds of "EMG" tests now used for Myasthenia Gravis (MG). There is the repetitive nerve stimulation and single fiber electromyography. My neighbor is Myasthenia Gravis sufferer so she explained me this. If you had the repetitive nerve stimulation then it is positive in about 50-80%, but it correlates very well with the severity of MG. The other test the Single fiber electromyography is more sensitive 80-100%. I don’t know who tested you, but if the test is done by experienced electromyographer and the arm is weak, then a negative single fiber electromyography test in that weak arm means no MG. But again I am not a doctor, so it is better to consult specialist about this.