Superficial palmar arch
Formed by the ulnar artery and the palmar area of the radial artery, the superficial palmar arch is sometimes referred to as the superficial volar arch, the arcus pamaris superficialis, the superficial ulnar arch or the arcus volaris superficialis. In certain people, the radial artery does not contribute to the formation of the palmar arch. Instead, the anastomoses, the princeps pollicis artery, the median artery and radialis indicis arteries compose this arch. Alongside the superficial arch lies the superficial palmar artery, which supplies blood to each of the lumbrical muscles. The superficial and deep palmar arches serve as a network of arteries inside the palm. Three of these arteries in the palmar network extend down the lumbrical muscles. Located across the face of the palm, this superficial palmar arch curves downward across the hand. When the thumb is fully extended, the arcus pamaris superficialis lies at the same level as the thumb. This superficial arch lies further away from the thumb than the deep palmar arch.