I'm going to resurrect this thread rather than start a new one. I get those sleep myoclonic jerks periodically, complete with the falling sensation. Never concerned me. For a while, I also occasionally get a jaw contraction just before falling asleep (which sometimes results in a bitten tongue). More annoying than the myclonic jerk, but it still didn't concern me. For the past several nights, I've been having what I think are hypnic jerks, but they've been frequent--one every couple of minutes until I fall asleep--and more widespread. Legs, arms, hands/fingers, and--get this--chest muscles. It's a sudden, single contraction.The sleep myoclonic jerks definitely happen in that just-before-sleep stage. The lastest ones seem to occur earlier in the just-before-sleep stage. I feel like they happen when I'm just starting to fall asleep but am still somewhat conscious. It arouses me, I try to go back to sleep, and there's another one. I think I have dream-like images in my head when they happen, but I don't have that falling feeling, and the jerks don't seem to be related to anything going on with those images (I'm not calling them dreams because they don't seem to be as organized as dreams).It seems kind of ironic that the increase in jerks happened about a week or so after I started taking Amrix, a muscle relaxer, for headaches. I've also recently begun taking a magnesium, B-2 (riboflavin), and feverew supplement for headaches. And magnesium is also supposed to also relax muscles.Anyway, I was just wondering if anyone gets these jerks/contractions in places other than legs and arms. I just spoke to my neuro yesterday about the results of my c-spine MRI (some arthritis and stenosis between C6 and C7 if I understood correctly) but didn't mention the jerks because they only happened for a night or two before last night and weren't that bad. After last night, I was considering calling him again but don't want to if my contractions in unusual places aren't that unusual.