Hi Deb
the major nerves that go to the arm and the Median and Ulna nerves. They both travel down the neck before branching out to the arm. I do not know nor understand how or why this nerve would have been cut. But at least you can google.

I like the idea that the nerve is damaged or stretched rather than cut and would definitely look for a second opinion

Good luck, and let us all know the outcome so we can all learn from this.

Karen
PS My Alex gets weird nerve impulses too (moves his head and feels tingling in his feet) and the RO just looked blank when we mentioned it