All About A Fort Wayne Normal Lumbar Spine The normal lumbar spine has a slight concave curve to it. It holds many pain-producing structures - the disc, facet joints, and spinal nerve roots - all co-existing in the smallest of areas in the body: in the spinal canal and between facet joints. Irritation of any one structure alone or in combination with another causes pain. "This information and website content is not intended to diagnose, guarantee results, or recommend specific treatment or activity. It is designed to educate and inform only. Please consult your physician for a thorough examination leading to a diagnosis and well-planned treatment strategy. See more details on the DISCLAIMER page. Content is reviewed by Dr. James M. Cox I."