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Medial Dorsal Cutaneous Branches of Posterior Intercostal Arteries (Left)
Cardiovascular System

Medial Dorsal Cutaneous Branches of Posterior Intercostal Arteries (Left)

Rami cutanei dorsales mediales arteriae intercostalium posteriorium

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Quick Facts

The medial cutaneous branch arises from the dorsal branch of the posterior intercostal artery. The medial cutaneous branch follows the medial branch of the posterior ramus of the corresponding thoracic nerve. It travels posteriorly, crossing the transverse processes of the adjacent vertebrae. It courses behind the longissimus and spinalis muscles and piercing the trapezius or latissimus dorsi muscles to become superficial. Along its course, the medial cutaneous branch of the dorsal branch of the posterior intercostal artery supplies the longissimus thoracis, spinalis, and skin adjacent to the vertebral column.

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