Intercostal Muscles
Origin: From the first to the eleventh ribs, on the inner surface and inferior border, from the tubercles of the rib posteriorly to the costocartilage anteriorly
Insertion: The rib immediately below the level of proximal attachment, on its superior surface
Actions: Elevation of the ribs during respiration
Innervation: Intercostal nerves, ventral rami of T1 through T11
Blood Supply: Intercostals arteries
Primary Actions of the Intercostal Muscles
1. Elevation of the ribs during respiration
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Muscle Pain Information: The intercostal muscles contributes to pain around the rib cage.