title: Spondylolytic fractures.
abstract: A method is described whereby fractures of the neural arch similar to those in spondylolysis are produced experimentally. The forces, bending moments and displacements required to initiate the fractures are given; The mechanical aspects in the aetiology of spondylolysis are explained by a simplified two-dimensional force analysis.
mesh_terms: D000368:Aged; D001696:Biomechanical Phenomena; D005260:Female; D005269:Femur; D050723:Fractures, Bone / Q000209:etiology; D006801:Humans; D008159:Lumbar Vertebrae / Q000293:injuries*; D008297:Male; D008875:Middle Aged; D013168:Spondylolisthesis / Q000209:etiology; D013169:Spondylolysis / Q000209:etiology; D013314:Stress, Mechanical