lagr,

I have a similar problem when I am going to sleep. I take gabapentin (Neurontin 900 mgs) and hour or so before bed to help with them. They are most likely for me just as I am about to fall asleep and then sometimes during sleep. The gabapentin helps immensely but not always.

I can be sitting and my hand will start to have tremors.

Sometimes, it appears to be related to inflammation in my upper neck.

I find that sleeping with my head and neck is straight alignment helps to reduce them.

I hope this helps.

My best to you.