Serratus Posterior Inferior Muscle Overview - Human Anatomy | Kenhub Kenhub - Learn Human Anatomy

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The serratus posterior muscles are two thin, superficial back muscles which lie above the intrinsic back musculature. They are also referred to as spinocostal muscles. The serratus posterior muscles are comprised of the serratus posterior superior muscle and the serratus posterior inferior muscle. Both originate from the spinous processes and attach on the ribs.

The serratus posterior inferior muscle originates from the spinous processes of the T11 to T12 thoracic vertebrae and has its insertion on the four lower ribs. Both muscles are known to be among the secondary back muscles, meaning that they migrated to the back in the course of embryogenesis. Therefore, their nerve supply comes from the posterior branches of the spinal nerves, the intercostal nerves. The serratus posterior muscles contribute to the movement and stabilization of the vertebral column and the thorax.

In this video, we cover:

0:11 Definition of the serratus posterior muscles
0:42 Origin and insertion of the serratus posterior inferior muscles
0:55 Innervation of the serratus posterior inferior muscles
1:12 Function of the serratus posterior inferior muscles

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Read more on the serratus posterior inferior muscle in this article, where we also cover scapulocostal syndrome: https://khub.me/orgp4

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Serratus Posterior Inferior Muscle Overview - Human Anatomy | Kenhub
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