Hi Dabbo,
I think the Ulnar Nerve runs down the inside of the arm. The Nurse Practisioner at my last post op visit told me the sensativity that I was experiancing on the inside of my arm was most likley from the Ulnar nerve waking up she said that is where it runs down the arm.. I describe it as if you place your palm up it would be the inside of the arm from the axilla to the elbow. I see my surgion today so I will double check with him and get back to you on it. I am still having that ugly feeling in the same area.
Hugs
Dawn