title: The structure of the pars interarticularis of the lower lumbar vertebrae and its relation to the etiology of spondylolysis, with a report of a healing fracture in the neural arch of a fourth lumbar vertebra.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001344:Autopsy; D005260:Female; D050723:Fractures, Bone / Q000503:physiopathology*; D006801:Humans; D008159:Lumbar Vertebrae / Q000033:anatomy & histology* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D013124:Spinal Injuries / Q000473:pathology* / Q000503:physiopathology; D013168:Spondylolisthesis / Q000209:etiology* / Q000503:physiopathology; D013314:Stress, Mechanical; D014945:Wound Healing