lumbodorsal fascia, the extensive subdivision of the vertebral fascia that sheaths the sacrospinalis muscle. It spreads caudally to become the glistening white lumbar aponeurosis and the origin of the latissimus dorsi. Medially it attaches to the sacrum, laterally to the ribs and the intercostal fascia, and cranially to the nuchal ligament. See also thoracolumbar fascia.
