SUPERFICIAL PALMAR ARCH

 

ORIGIN: Superficial branch of ulnar artery and superficial branch of radial artery

COURSE/DISTRIBUTION: This arch is formed mainly by the superficial branch of ulnar artery with contribution from superficial branch of radial artery. It is superficial to the deep arch. It gives common digital branches to the fingers.

BRANCHES:

  • Common digital arteries

The arch is responsible for providing digital arteries as follows.

  • Beginning from its most medial part, it gives off  the first branch which is the proper digital artery to the medial aspect of the little finger

  • The second branch is the common digital artery which divides into two branches at the interdigital cleft between the little and the ring fingers. It divides into proper digital arteries at this cleft so that the most medial runs on the lateral border of the little finger and the lateral runs on  the medial border of the ring finger supplying these regions.

  • The third branch is the common digital artery which supplies the ring and middle fingers. It is the common digital artery to these fingers which divide at their interdigital cleft to form proper digital artery to the lateral border of the ring finger and proper digital artery to the medial border of the middle finger.

  • Fourth branch is the common digital artery which runs to the interdigital cleft between the middle and index fingers. It then divides into proper digital arteries which run at the lateral border of eh middle finger and also at the medial border of the index finger.

  • A fifth branch sometimes exists which supply the index finger but they supply of the index and thumb is mostly provided by the deep palmar arch.

 

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