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spondylolisthesis |
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spondylolisthesis /spon·dy·lo·lis·the·sis/ (-lis´the-sis) forward displacement of a vertebra over a lower segment, usually of the fourth or fifth lumbar vertebra due to a developmental defect in the pars interarticularis.spondylolisthet´ic
spondylolisthesis (spônˈ·d n anterior slippage of a vertebra relative to the vertebra immediately below. spondylolisthesis forward displacement of a vertebra over a posterior segment due to a congenital defect or fracture in the pars interarticularis. Occurs in the giant breeds of dogs as wobbler syndrome and as a developmental defect called kinky back in broiler chickens. Affected birds are unable to stand normally and may be completely paralyzed. The causative lesion is a deformity of the sixth thoracic vertebra but the cause of the defect is unknown. |
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