Ok, i'm new to all of this (diagnosed BFS last week). I have had 2 EMGs - first one (6 or so weeks ago)looked like I had slow sensory and motor function (needle emg normal)- they thought i had CIDP.. repeat this past week looked "great" needle emg- no abnormal activity at all (even though i twitch all the time, neither emg has picked this up - wierd) and this repeat one said no sensory or motor deficits (i was diagnosed with polyneuropathy based on the last emg and my sensory tests at the neuros office x 2 neuros, sensory to temperature mostly)Anyhow, my questions are:1. the Nerve conduction velocity part.. i know the sensory part would be normal in the bad diseases, but would the motor part - where they zap you and you twitch, be normal too? it seems like it would be slowed in MND, but curious what yall think/have read etc.. or is only the EMG needle part the only abnormal part in MNDs?2. It seems like reading an EMG, along with the neuro exams would be so subjective.. I could see how things could be missed by neuros, especially if they arne't used to seeing certain diseases.. is it super obvious on them if there is a problem?? 3. if you don't have "clinical weakness" yet, but you feel weak, and you actually had a MND would it show up on the EMG , or since your muscle isn't "dead" enough to cause clinical weakness would it also not be "dead" enough to show up on the EMG (especially to an nonspecialists eye)?4. if you have fasiculations from a MND does that mean when they manipulate the needle in the EMG part of the test that they would then see the fibs, fasics, sharp waves etc associated with the disease? (I had no activity at all when they minipulated it- well no spontaneious activity I should say)5. lastly, F waves and H waves.. would those be anormal in MNDs?? it seems like they would be longer, but just curious.. also again, would those be abnormal in early disease as well??So sorry for all of my questions, as I said I"m new to this all, and still in total freak out mode at times!! I wish i could just believe the neuros with 100% certainty, but the further I get from my appointments, the more I start to doubt that something worse is in fact going on.. thanks again for your time!
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Newly Diagnosed BFS: EMG Results
- Thread starter ny446
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christinasgirl123
Well-known member
1. the Nerve conduction velocity part.. i know the sensory part would be normal in the bad diseases, but would the motor part - where they zap you and you twitch, be normal too? it seems like it would be slowed in MND, but curious what yall think/have read etc.. or is only the EMG needle part the only abnormal part in MNDs?Both parts would be normal in MND, at least in early stages.If the nerve conduction part includes transcranial magnetic stimulation (where they put this huge magnetis thing on your head) this would show abnomal signs as it is looking at the pyramidal "traffic".2. It seems like reading an EMG, along with the neuro exams would be so subjective.. I could see how things could be missed by neuros, especially if they arne't used to seeing certain diseases.. is it super obvious on them if there is a problem?Actually reading an EMG is nowadays not soooooo hard. The really bad things like fibs and positive sharp waves and motor unt recruitment are actually very good visible and even hearable. The rest is calculated by computer. So the reading part is not that hard, the hard thing is to make a cut between still normal and suspicious. I mean, if it is clear without anything but fasciculations, it is very sipmle. Most of us have this kind of EMG and can be told right away that it is OK (as long as the doctor may say anything at all without showing to his boss, or as long as it is not a technician that does them, these must not say a word about results). But some EMGS are a bit dirty and there the doctors have to make a choice, and as long as the EMG will not show all abnormalinies that are needed to make a dx of ALS, they will not say that this EMG shows ALS.3. if you don't have "clinical weakness" yet, but you feel weak, and you actually had a MND would it show up on the EMG , or since your muscle isn't "dead" enough to cause clinical weakness would it also not be "dead" enough to show up on the EMG (especially to an nonspecialists eye)?Definately. The muscle is not dead when it makes signals like fibs or psw. What they see there, is a struggle for its survival to get any input, long before anything is"dead" there.4. if you have fasiculations from a MND does that mean when they manipulate the needle in the EMG part of the test that they would then see the fibs, fasics, sharp waves etc associated with the disease? (I had no activity at all when they minipulated it- well no spontaneious activity I should say)They would see it as soon as they stick in the needle when the muscle is at rest. They manpioulate the needle (steering it in directions in every needle hole) to investigate 4 different units (so they do not have to poke you 4 times), to get a better view. 5. lastly, F waves and H waves.. would those be anormal in MNDs?? it seems like they would be longer, but just curious.. also again, would those be abnormal in early disease as well?? I don't know if or if not, sorry-
SimonaStar
Well-known member
is it normal that when EMG noise coming from the speakers?????When I had my Emg came during the tense muscles noises from the speakers!
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