The L2 Vertebra

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The L2 vertebra is the second uppermost of the five (5) lumbar vertebrae toward the lower end of the spinal column, within the lower back. Like the other lumbar vertebrae, it is among the largest of the bones in the spinal column, with a substantial, cylindrical centrum (ventral body) that is wider than it is deep to support the body's weight and the substantial vertical compression at that point in the spine. The spinous process is likewise massive to support the efforts of the stabilizing muscles that create balance, flexion, and extension in the lower back. Additionally, the spinous process is fairly rectangular and extends more or less horizontally from the rest of the bone. The rest of the vertebral arch includes wide, strong laminae; very large pedicles notched above and below; long and thin transverse processes; and a triangular central vertebral foramen (that is a bit larger than that of the L1 vertebra) for passage of the spinal cord. A superior articular process presents a facet that articulates with the L1 vertebra above, and an inferior articular process and facet articulates likewise with the superior process of the L3, with each process emanating from the vertebral arch between the pedicle and transverse process. The transverse processes lack foramina, which differentiates the lumbar vertebrae from the other true vertebrae.