Barium Enema with Air Contrast. Your doctor has requested a procedure called a barium enema with air contrast. This exam is performed to assess a change in bowel habits, abdominal pain or rectal bleeding, or if your doctor suspects that you may have diverticulitis (small inflamed areas in your colon) or polyps (growth of tissue on your colon).
Medial branch nerves are very small nerve branches that carry the pain message from the facet joints and the muscles around the joints.If the nerves are blocked or numbed, they will not be able to transfer the pain sensation from the joints to the brain.edial branch nerves are very small nerve branches that carry the pain message from the facet joints and the muscles around the joints.
For the facet joints, the medial branch nerves are the small nerves that carry pain signals to the brain. Facet joints are pairs of small joints that are situated at each vertebral level of the spine. A facet joint may also be called a zygapophysial joint or a Z-joint. Cervical medial branch nerves are located in a bony groove in the neck. 2  Thoracic medial branch nerves are located over a bone in the mid-back or upper back. 3  Lumbosacral medial branch nerves are found in a bony groove in the low back. 4  See Spinal Cord and Spinal Nerve Roots.