The superficial palmar arch is formed predominantly by the ulnar artery, with a contribution from the superficial palmar branch of the radial artery. However, in some individuals the contribution from the radial artery might be absent, and instead anastomoses with either the princeps pollicis artery, the radialis indicis artery, or the median artery, the former two of which are branches from the radial artery.
Alternative names for this arterial arch are: superficial volar arch, superficial ulnar arch, arcus palmaris superficialis, or arcus volaris superficialis.
The arch passes across the palm in a curve with its convexity downward.
If one were to fully extend the thumb, the superficial palmar arch would lie approximately at the level of a line drawn from the distal border of the thumb across the palm. The superficial palmar arch is more distal than the deep palmar arch.
Three common palmar digital arteries arise from the arch, proceeding down on the second, third, and fourth lumbrical muscles, respectively. They each receive a contribution from a palmar metacarpal artery. Near the level of the metacarpophalangeal joints, each common palmar digital artery divides into two proper palmar digital arteries.
Other articles related to "palmar arch, arch, palmar, superficial palmar arch, superficial palmar":
... The deep palmar arch (deep volar arch) is an arterial network found in the palm ... with the ulnar artery contributing via its deep palmar branch ... This is in contrast to the superficial palmar arch, which is formed predominantly by the ulnar artery ...
... The palmar aponeurosis The radial and ulnar arteries Superficial palmar arterial and venous arches Superficial palmar arterial and venous arche Superficial palmar arterial and ...
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