Serratus posterior superior muscle

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The serratus posterior superior muscle is a muscle in the back that connects the upper part of the spinal column to several ribs and assists with breathing in, especially when done forcefully.

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Origin

The serratus posterior superior originates at three vertebrae in the upper back. It attaches to the spinous processes of C7-T2 and the supraspinous ligament above those vertebrae.

Insertion

The serratus posterior superior inserts at four of the upper ribs. It attaches to the posterior aspect of the second through fifth ribs.

Innervation

The serratus posterior superior is innervated by the anterior primary rami (T2-T5).

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