The lumbar spinal nerve root canals.
D001416:Back Pain / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D008159:Lumbar Vertebrae; D012585:Sciatica / Q000209:etiology* / Q000503:physiopathology; D013126:Spinal Nerve Roots / Q000503:physiopathology