Arcus palmaris superficialis

The superficial palmar arch originates as the terminal branch of the ulnar artery, distal to the flexor retinaculum . It is located superficial to the long flexor tendons of the digits and deep to the palmar aponeurosis.

The superficial palmar arch travels distally, then laterally across the metacarpals. In two-thirds of cases, it remains incomplete, forming a “hockey-stick” shape . In the remainder, it anastomoses with the superficial palmar branch of the radial artery and the radialis indicis artery, forming a complete arch.

The superficial palmar arch gives rise to the common palmar digital arteries. A separate branch provides a palmar digital artery to the lateral surface of the 5th digit .

The superficial palmar arch supplies the following structures :

Clinical significance

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