I cannot explain these neurological effects. Neck pain and shoulder pain origins are generally easy to explain but these central symptoms are not my speciality. I think you need to find a good neurologist (not neurosurgeon) to help define what the origin of these symptoms are.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.