Sarah and ((25)), relax... you BOTH had your EMG's AFTER you started twitching... several weeks after. Well, if twitching caused by ALS is a SECONDARY symptom, that would mean that you would have ALS running through your body already and doing it's thing to your muscles and nerves, so with that, NO, neither of your testes were too early.
If someone just happend to have an EMG done, for some other reason, and had no twitching or ANY signes of ALS, yet later-on developed ALS, then that would show why some tests "could" be too early. No symptoms were present at the time of the test. No twitching, no symptoms no signs on the EMG.
Let me explain it like this. We all pretty much know about HIV and AIDS, right? We know that you can become infected and while it is incubating and multiplying in your body, it most likely won't show-up in a blood test UNTIL there is enough of the disease present to initiate your body to release antibodies for the virus. It is those antibodies that tests screen for, right? So with that, it could be several weeks before HIV would show-up on a blood test with NO symptoms of HIV or AIDS before hand. That would show that there is a time where it is too early to test. On the other hand, if someone showed symptoms of AIDS and got tested, obviously it has already taken-hold of their body and it would certainly show-up in a blood test. Positive symptoms = positive test RESULTS. Not that symptoms MEAN you are HIV positive or twitching MEANS you have ALS, I am saying that SYMPTOMS that are present will mean the test will show SOMETHING one way ot the other. It is not too early for results one way or the other.
Well, ALS is exactly the same way. It takes a short while for ALS to show-up on a test (the EMG) BUT, and this is a big BUT, there would have to be NO symptoms at that time as well, or none noticed and that is the key here. If you got an EMG done WITH twitching, and we KNOW that twitching is a reaction the dying muscles do as a last ditch effort to stay alive, then you would have ALS present already and it WOULD certainly show-up on an EMG. Are you following me here? It's actually really simple. Let me put it this way, BOTH of you had twitches at the time the EMG's were performed, right? Well if it was really ALS, twitching IS a symptom of ALS that has ALREADY taken-over in your body and it WILL show-up on a test. Both of you had clean EMG's WITH symptoms present... You two are certainly in the clear, so relax.
