dorsal metacarpal arteries dorsal metacarpal arteries 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 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. dorsal metacarpal arteriesarteries of the back of the forearm and hand. (dorsal metacarpal visible at bottom center.)detailssourcedorsal carpal archbranchesdorsal digital arteriesveindorsal metacarpal veinsidentifierslatinarteriae metacarpales dorsalesta98a12.2.09.034ta24648fma70800anatomical terminology the first dorsal metacarpal artery arises directly from the radial artery before it crosses through the two heads of the first dorsal interosseous muscle.