I saw your post about hypnic jerks, and even though you posted it in August, you might still see this. I hope by now you've found a solution. My hypnic jerks kept getting stronger and more frequent to the point I would get no sleep at all. And they were violent, not just twitches. Some were in my head as well. These sounded like a loud snap. Yesterday I stumbled upon an article suggesting low magnesium might be the culprit, so I got a bottle of 63mg mag tabs, and son-of-a-gun if I didn't have 1 single episode of hyp jerk, and I slept for 5 hours or so. I had no idea the mag would work immediately, but it did, and I'm a whole different person today. So if you're still struggling with it, and I surely hope not, try the mag. Pleasant dreams!