Dissection of thoracic and lumbosacral regions of back from a posterior approach
Deep dissection of iliocostalis lumborum and longissimus thoracic muscles; multifidus muscle
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Image #214-2
Dissection of thoracic and lumbosacral regions of back from a posterior approach
Deep dissection of iliocostalis lumborum and longissimus thoracic muscles; multifidus muscle
The upper parts of the iliocostalis and longissimus have been cut away to expose the lower fascicles of these muscles as they pass deeply. The iliocostalis lumborum has strong insertions on the angles of the lower ribs. The longissimus spreads somewhat to insert into ribs, transverse processes, and accessory processes of the lumbar vertebrae.