Your question seems to be more in the realm of Rehabiliation/Orthopedics rather than Neurology, so I'm not sure if I can give you the answers that you want
Comprssion of the C5 nerve root can give pain in the same area but would be picked up by MRI or the EMG. With normal EMG and MRI findings the problem is likely to be muskuloskeletal
Make sure that the EMG you had done looked at the C5 muscles - supra or infraspinatus, deltoid, brachioradialis, biceps
Have you had an MRI of the shoulder region (as opposed to the neck) this can be senstive to picking up soft tissue injuries
Try a good Physical Medicine and Rehabilitation doctor if you have not already
Good luck
My symptoms were a "knot" between my spine and inside edge of the shoulder blade that could be easily felt, extreme pain at the lower edge of my left shoulder blade like how a muscle tear feels, pain in my left lat, armpit, shoulder, tricep, elbow, upper forarm and wrist. Also weakness in my tricep, chest muscle, and hand, especially thumb and 4th and 5th fingers. My left arm was often "asleep" when I'd wake up in the middle of the night. I finally also started experiencing tingling in my left face and leg.
A cervical spine MRI showed impingment of the nerve roots at C4/5, 5/6, 6/7, buldging into my spinal cord. I had a double disk disection which aleviated all of these problems, although my running and waterskiing days are over. But no more pain or tingling to report one year after surgery, and my strength is coming back.
Thank you so much for your time.
yorkshirepoet
While I have never the big red F, I certainly can sympathize with your problem. I was diagnosed with cervical ddd 1 year ago, and had problems like yours. my pain specialist doc ordered an mri for shoulder and found out labrum was torn as well as bicep muscle. I am still mending from surgery on the 18 of april. Still dont understand why no mri was ordered for neck......
take care