My orthopedic doctor is sending me for a cervical MRI for post surgery pain due to my rheumatoid arthritis. He did several test during the physical exam. He had me try to walk a straight line and it was like I was drunk. He said he wanted to have a test done at the physical therapy and rehab center on a treadmill then I can't remember what he said after that or what this is for. I had two surgeries on my L4, L5,C3&4. Do you know what kind of test this is for my hips?