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The iliocostalis thoracis is a defined muscle part of the iliocostalis lumborum muscle.
Lumbar part or lateral division of lumbar erector spinae; Thoracic part
Musculus iliocostalis lumborum
Latin muscle parts
Pars lumbalis or divisio lateralis musculus erectores spinae lumborum; Pars thoracica
Epaxial muscle – Erector spinae – Iliocostalis
The English name for this muscle is the muscle between the groin, or flank, and the ribs in the loin region. The word iliocostalis comes from the Latin words ilium meaning “groin, or flank,” and costa meaning “rib.”Lumborum comes from the Latin lumbus for “loin.”
Base of the rib near the transverse process for ribs 7 to 12.
Posterior tubercle of transverse process of cervical vertebra 7 and posterior surface of the angle of ribs 1 to 6.
Extension of the vertebral column; assist with lateral flexion of vertebral column;; postural stabilization of vertebral column.
Dorsal rami of thoracic and lumbar spinal nerves (T7 to L3)
Dorsal branches of the lumbar arteries from the aorta. Dorsal branches of the lateral sacral artery from the internal iliac artery.