In my opionion the nerve conduction study is more uncomfortable than the emg, which did not bother me at all. I was having the process done years ago at the University of San Francisco, I think the guy doing it was doing his residency, he could not find a nerve in my arm and shocked me about 20 times in the same spot, that got the pain up.As for the emg, just tell them your symptoms and let them do there job, surely tell them about your tongue. I did tell them where to stick me in the calf, my calf was going nuts, not visibly, but it felt like 30 bugs where running around in the muscle. I pointed at it and said "right there" He gave me a funny look, he was cool though, and stuck the needle right in the center of the action. No fasics showed up, it blew my mind. That jives with what Aaron has said about BFS fasics and ALS fasics, they are totally different.As for the tongue, at this same EMG I mentioned to the guy doing it if he had been told about my tongue, he said "what wrong with your tongue" I told him it was twitching. He took a quick look in my mouth and continued with the emg, at the end he stuck the need through my neck into the bottom of my tongue and said "stick out your tongue". I am not trying to scare you, it did not hurt, but that is how he did my tongue.