My twitches vary. Some are distinct, what I call ‘traditional twitches’ like when you see someone’s eyelid twitch. Some feel more wiggly or like a hair is tickling under the skin. Others feel like a wave or ripple going down a muscle. My tongue has very fine twitch/quiver in the middle, which again makes me very worried.
It’s great that you can set aside the worry about dementia. That is much healthier than what I’m doing. I hope it is never a problem for you!