I do fine on the strength tests, except once when the neurologist had me push back on his hand...and keep pushing...and keep pushing. My strength is quite normal at first--it's just that I wear out faster than normal. So if they only test my strength for a few seconds per muscle, I seem normal. I think that my kind of weakness is typical of mild-to-moderate MG, and that therefore a neurologist who suspects MG should ask the patient to sustain the push.

I'm seronegative, too (blood tested negative for antibodies). I was diagnosed by single-fiber EMG.

Abby