Hi iz2014 just seen your post. I posted a similar query on here a while ago and got no response. But some of the members on the UK AN site I'm on have also had arm problems. I've had loads of arm injections taking blood etc before and after diagnosis but I wondered if it was the AN causing nerve damage. My neurosurgeon didn't know what was causing it, nor my GP. The physio I've seen recently thinks it could be the AN as nerve pathways travel from the AN area of the brain down the arm. I have recently wondered like you, if it is needle damage though!
My arm started off more pins and needles than numb, with muscle popping on and off. Its now more numbish like you've leaned on it, and still with the slight hand tremor, in my left, AN side where I also had all the needles inserted. Its been worse since treatment, like my other symptoms such as tinnitus and imbalance. Another lady on the UK site has also found its worse since SRS. Scared myself googling and findling parkinsons, MS and MND along with heart and stroke issues! Someone else on the UK site also thought parkinsons but her arm problem eventually went away. Lets hope!
Hope you are doing OK, how's things. Are you getting treatment at Addenbrookes? Did you ever join the UK site I mentioned?
Alison X