sbrn ~
I'm very perplexed to learn about Greg's loss of sensation & strength in his arms. Obviously, if the doctors can't seem to find a reason for this development, I certainly won't try. However, we have had one or two of our members report some loss of strength/sensation in their arms, post-op. I'm not sure what the solution was, if any, for them. This is a conundrum. The causes may be as varied as the answers seems elusive although I suspect the AN surgery was not a major factor but of course, I could be wrong. However, you and your husband cannot stop being proactive in finding (a) the cause of this condition and, (b) the solution, whatever it may be. Try not to despair until you have a definite diagnosis. - and not even then. I'm sure this can be solved. You and Greg will definitely be our thoughts and prayers.
Jim