Serratus posterior superior muscle

Serratus posterior superior muscle
Thin film-like object, at center, is serratus posterior superior muscle.
OriginNuchal ligament (or ligamentum nuchae) and the spinous processes of the vertebrae C7 through T3
InsertionThe upper borders of the 2nd through 5th ribs
ArteryIntercostal arteries
Nerve2nd through 5th intercostal nerves
ActionsElevates ribs 2-5
LatinMusculus serratus posterior superior
Anatomical terms of muscle

The serratus posterior superior muscle is a thin, quadrilateral muscle. It is situated at the upper back part of the thorax, deep to the rhomboid muscles.


The serratus posterior superior muscle arises by an aponeurosis from the lower part of the nuchal ligament, from the spinous processes of C7, T1, T2, and sometimes T3, and from the supraspinal ligament. It is inserted, by four fleshy digitations into the upper borders of the second, third, fourth, and fifth ribs past the angle of the rib.


The serratus posterior superior muscle elevates the second to fifth ribs.[citation needed] This aids deep respiration.[citation needed]

Additional images

See also

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