Hi again
By trap I meant the trapezoid muscle. The vagus nerve is very important in nervous system regulation and can get out of whack with trauma or stress. There’s many books out there about it. I personally can tell a difference in my internal tremors/vibrations if I am very relaxed when falling asleep like I said before having a neck and shoulder massage right before.
BTW when my nighttime tremors first started I literally could not sleep. Every single time I would start to fall asleep the internal tremor was so bad it woke me up. A continuous cycle. I was convinced I had atrial flutter because they felt like they were in my chest. Cardiologist put monitor on me and said no. The tremors are now more in my legs but less intense. Tried deep breathing last night before bed and I think it helped a little. Good luck to all.