Good news if you already consume tuna on a regular basis, itâs high in niacin compared to many other foods. Itâs also a good source of omega-3s as well as protein. There are concerns about the mercury content, so you may not want to rely on tuna for your daily niacin consumption, but itâs nice to have once in awhile. Serving Size (100 grams), Niacin (5.8milligrams), 184 calories.
At the end of the spinal column is the coccyx or tailbone. Most people have 33 vertebrae in total, although there may be 32 or 34. Variations are usually found in the lumbar or sacral regions.
1 The spinal cord travels from the base of the skull through the spinal column and ends at about T12-L1 - where the thoracic spine meets the lumbar spine. 2  At that point numerous nerve roots from the spinal cord continue down and branch out, forming the  cauda equina , named for its resemblance to a horse's tail.rticle continues below. 1  The spinal cord travels from the base of the skull through the spinal column and ends at about T12-L1 - where the thoracic spine meets the lumbar spine. 2  Spinal Cord and Spinal Nerve Roots. 3  The lower spine curves slightly inward, toward the abdomen.