Most of the dorsal metacarpal arteries arise from the dorsal carpal arch and run downward on the second, third, and fourth
dorsal interossei of the hand
In human anatomy, the dorsal interossei (DI) are four muscles in the back of the hand that act to abduct (spread) the index, middle, and ring fingers away from hand's midline (ray of middle finger) and assist in flexion at the metacarpophalange ...
and bifurcate into the
dorsal digital arteries. Near their origin, they anastomose with the
deep palmar arch by perforating arteries. They also anastomose with
common palmar digital arteries (from the
superficial palmar arch), also via perforating arteries.
The first dorsal metacarpal artery arises directly from the
radial artery
In human anatomy, the radial artery is the main artery of the lateral aspect of the forearm.
Structure
The radial artery arises from the bifurcation of the brachial artery in the antecubital fossa. It runs distally on the anterior part of th ...
before it crosses through the two heads of the first
dorsal interosseous muscle.
References
External links
* - "Dorsum of the hand, deep dissection, posterior view"
Arteries of the upper limb
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