Serratus posterior inferior muscle

Serratus posterior inferior muscle
Muscles connecting the upper extremity to the vertebral column (serratus posterior inferior labeled at center right).
Serratus posterior inferior (red) seen from back.
Details
OriginVertebrae: Spinous processes of T11 - L2
InsertionThe inferior borders of the 9th through 12th ribs
ArteryIntercostal arteries
NerveIntercostal nerves T9 through T12
ActionsDepress the lower ribs 9-12, aiding in expiration
Identifiers
Latinmusculus serratus posterior inferior
TA98A04.3.01.010
TA22235
FMA13402
Anatomical terms of muscle

The serratus posterior inferior muscle, also known as the posterior serratus muscle, is a muscle of the human body.

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