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.
At the pointed end of the conus medullaris, the nerve roots of the spinal cord continue in a dangling formation called the cauda equina, which resembles a horseâs tail.Because the conus medullaris resides in the lower back, injuries or conditions of the lumbar spine can affect this terminal end of the spinal cord.ections. Conus medullaris is the cone-shaped end of the spinal cord. It is normally located between the end of the thoracic vertebrae (T12) and the beginning of the lumbar vertebrae (L1), though sometimes the conus medullaris is found between L1 and L2.