The lumbar spine contains 5 moderately large vertebrae which sit atop the sacrum. These bony segments act as attachments for muscles and ligaments in the lumbar spine and also encase and protect the lower spinal cord and lumbar nerve roots.
Because the lumbar vertebrae are located between the pelvis and upper torso, the degree of stresses endured by the lumbar spine are great. These abnormally high degrees of stress result in frequent lumbar vertebral subluxations - misalignments and improper motion patterns of the lumbar vertebrae. If left uncorrected, these misalignments and faulty biomechanics of the lower spine can result in spinal injury and irreversible degenerative changes.