Inferior Articular Facets of Fifth Lumbar Vertebra
Facies articulares inferiores vertebrae lumbalis quintae
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The inferior articular facets are the smooth, anterolaterally facing articular areas on the inferior articular processes of a lumbar vertebra. They articulate with the corresponding superior articular facets of the vertebra below, forming zygapophyseal joints.
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Fifth Lumbar Vertebra
The fifth lumbar vertebra might become included into the sacrum and so become sacralized, or alternatively the first sacral segment might remain separate from the rest of the sacrum and become lumbarized.