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First posterior intercostal artery

Arteria intercostalis posterior prima · První zadní mezižeberní tepna

Heart & arteries

Looks like

An artery running under the first rib, usually from the superior intercostal branch of the costocervical trunk.

What it does

Supplies the first rib space: muscles, skin and the upper spine.

Keeping it well

Rarely a problem; can bleed in first-rib fractures or surgery at the top of the chest.

Related conditions