1 Axial pain. 2  Also called mechanical pain, axial pain is the most common cause of back pain and may present in a number of different ways (sharp or dull, constant, comes and goes, etc.). 3  A muscle strain is a common cause of axial pain.ommon anatomical causes of back pain include: 1  The large nerve roots that go to the legs and arms may be irritated. 2  The smaller nerves that innervate the spine may be irritated. 3  The large paired back muscles (erector spinae) may be strained. 4  The bones, ligaments, or joints themselves may be injured.
Merge this question into. Split and merge into it. Answer by Puhlaa. Confidence votes 4.9K. The spinal cord enlarges at the cervical and lumbosacral areas in order to accomodate the extra neurons involved with the motor control going to, and sensations coming from, the upper and lower limbs.
This topic is about spinal stenosis of the lower back, also known as the lumbar area. If you need information on spinal stenosis of the neck, see the topic Cervical Spinal Stenosis. What is lumbar spinal stenosis? Lumbar spinal stenosis is a narrowing of the spinal canal in the lower back, known as the lumbar area. This usually happens when bone or tissue-or both-grow in the openings in the spinal bones. This growth can squeeze and irritate nerves that branch out from the spinal cord. The result can be pain, numbness, or weakness, most often in the legs, feet, and buttocks. What causes lumbar spinal stenosis?