Iliocostalis Lumborum Muscle
Iliocostalis Thoracis Muscle
Attachments of Iliocostalis Thoracis: Origin & Insertion
Origin: angles of ribs 7-12, medial to insertions of iliocostalis lumborum
Insertion: angles of ribs 1-6; transverse process of C7.
Actions of the Iliocostalis Thoracis Muscle:
- Bilateral action: extends vertebral column (= back)
- Unilateral actions: laterally flexes vertebral column (= back)
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Nerve Supply to Iliocostalis Thoracis:
- Dorsal rami of thoracic spinal nerves.