Is it possible for EMGs to be done too early to detect anything. I am a nurse and have done extensive research on Neuromuscular disorders. I have had undesirable symptoms (mainly right sided) for about 13 months now. I have experienced classic Als symptoms (stiffness, twitches (in ominous places), weakness, and what appears to like atrophy (right sided again). At any rate, I have had 3 EMG/NCV tests done (one at Mayo clinic in Jacksonville). The only one that showed anything was the one at Mayo on July 31,2012 which was a borderline result in my right ankle. Anyway, again my question is can EMG/NCVs be done too early to detect anything & can Clonazepam mask results as I have been taking it for a year. The Clonazepam definitely does something to the muscles because the pain is less and they seem stronger after a dose, for that small window of the drug's peak strength. The small inner circle I have included in this assume all is well because there hasn't been any remarkable results on any of the tests. But none of them have any medical background and sometimes results will not manifest until a certain level of disease is reached, such is the case with HIV where there is a few month window after infection before a standard blood test will detect the virus. I would be most grateful for any input.