I have symptoms similar to MG. No one can tell me what I have, but because I have negative "ACHR MODULATING" and negative "ACHR BLOCKING" and normal EMG and NCS tests, I've been assured it's not MG. My only symptoms (for about five weeks) is profound muscle fatigue after minimal muscle use. Sometimes only the muscle used gets fatigued, but sometimes it seems one overused muscle (as little as a minute) collapses my whole muscle systems. I look like a rag doll for hours until I seem to recover. Sometimes between spells I'm perfectly normal for an hour or two. I'm mostly on the couch all day trying to keep all muscles happy. I only had pain on the first day ... and it was substantial, primarily in my shoulders and arms. The fatigue war started after the pain left.

This happened twelve years ago and lasted about four months. I've had short spells of it here and there, but no more than a day or two.

Any thoughts?