The suprascapular artery has two main branches that supply oxygenated blood to different regions. These branches are called the suprasternal branch and acromial branch. The suprasternal branch supplies blood to the upper part of the chest. It crosses the clavicle (collarbone) near the sternum and ends in the upper chest skin. The acromial branch supplies blood to the skin covering the acromion of the scapula, a bony structure at the top of the shoulder blade. The suprascapular artery begins at the thyrocervical trunk (a branch of the subclavian artery) and goes across the phrenic nerve and a deep muscle located on each side of the neck called the scalenus anterior. Then it goes across the subclavian artery and runs behind the clavicle, or collarbone. It crosses over the superior transverse ligament and goes into the supraspinous fossa, which is a smooth, concave bony structure located at the back of the scapula. Then the suprascapular artery moves laterally behind the scapula neck, through the great scapular notch, and into the infraspinous fossa, a shallow, concave area on the back of the shoulder blade.