Iliocostalis thoracis muscle

In this article, we will discuss about the Iliocostalis thoracis muscle. So, let’s get started.

Iliocostalis thoracis muscle

It originates from the upper borders of the lower six ribs (T7-T12) medial to the insertion of iliocostalis lumborum and gets inserted into the upper borders of upper six ribs (T1-T6) and into the posterior part of the transverse process of C7. It is innervated by the dorsal rami of thoracic spinal nerve and artery supply is through the intercostal arteries. It’s chief action is extension of thoracic spine (bilateral) and lateral flexion of the thoracic spine (unilateral).

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