Anatomical variations in the S-shaped contour of the lumbar articular processes with special reference to subluxation.
D000293:Adolescent; D000328:Adult; D006801:Humans; D004204:Joint Dislocations; D008159:Lumbar Vertebrae / Q000033:anatomy & histology*; D008297:Male; D012447:Sacrum / Q000033:anatomy & histology