The deep palmar arch is an arterial network found in the palm.
It is formed from the terminal part of the radial artery.
The ulnar artery also contributes through an anastomosis.
The superficial palmar arch is formed predominantly by the ulnar artery.
The deep palmar arch lies upon the bases of the metacarpal bone and on the interossei of the hand.
The deep palmar arch lies deep to the oblique head of the adductor pollicis muscle, the flexor tendons of the fingers, and the lumbricals of the hand.
Alongside of the deep palmer arch, and running in the opposite direction—toward the radial side of the hand—is the deep branch of the ulnar nerve.
The superficial palmar arch is more distally located than the deep palmar arch.
The palmar metacarpal arteries arise from the deep palmar arch.
The deep palmar arch supplies the thumb and the lateral side of the index finger.