It is so good to hear from you. I'm so happy that you mother is doing well. As far as your neck goes did they examine your shoulder area. You probably need a MRI to look for buldging disc, degenerative joint disease, ect. If you are having numbness in your arm a herniated disc or buldging disc in your cervical spine could be the problem. Also you could have a impingement syndrome in your shoulder that could be causing neck and arm pain and numbness. Just a few thoughts. Good luck and God Bless.
PS Impingement does not always show up on the EMG nerve conduction stud