The radial collateral artery (another term for the anterior descending branch of the profunda brachii artery) is a branch of the deep brachial artery. It arises in the arm proper and anastomoses with the radial recurrent artery near the elbow.Cross-section through the middle of upper arm.Radial collateral artery The radial collateral artery (another term for the anterior descending branch of the profunda brachii artery) is a branch of the deep brachial artery. It arises in the arm proper and anastomoses with the radial recurrent artery near the elbow.