I don't know what I have and neither do my doctors. Neurologist calls it spasms and gave me an anti-culvulsant drug to take at night. Awful, makes me groggy.
I get spasms in neck and shoulder and left arms jerks. Most often when I'm tired, trying to sleep or sitting too long. I can feel huge know under my scapula == help, what could this be. PS I excercise.