Superficial Palmar Arch

The Superficial Palmar Arch arises primarily from the ulnar artery. It gives rise to the common palmar digital branches and successively proper digital palmar branches that distribute as far distally as the tips of digits two through five. The arch enters the palm with the ulnar nerve, passes anterior to the flexor retinaculum, and receives the superficial palmar branch of the radial artery. It lies deep to the palmar aponeurosis.

The superificial palmar arch is badly named, for in two-thirds of hands it has a hockey-stick shape and is not a complete arch (formed by the ulnar artery alone).