The twitches could possibly what are called "tic movements." I had these for a while, and still have an occasional twitch, but they went away with time and about a year of medication.

I've read tic movements can be a result of a neck injury and/or brain injury. When the neck injury is corrected and healed and brain health improves, they can start to go away. I also know that the more stressed you are, the more the twitches can happen.

A few times I would have these twitches before falling asleep as well.

Hope this helps.