Hi, Thanks for writing in. A homogeneously dark bone marrow on T 1 sequence refers to normal marrow signals in most cases. This is due to the fact that there is red marrow in your neck vertebrae. With age, the red marrow is replaced with fat and appears lighter. The changes in marrow appearances are a part of normal aging and has nothing to do with your illness. I would like to know details on your MRI findings so that I can discuss your symptoms in detail. There might be cord signal changes which are important considering your problems.