Collateral branch of posterior intercostal artery
Ramus collateralis arteriae intercostalis posterioris
- Related terms: Collateral branch
Definition
The collateral branch of the posterior intercostal artery is a small arterial branch that arises from the main posterior intercostal artery and courses along the superior border of the inferior rib in each intercostal space, running parallel to but below the main intercostal artery.
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