Superficial palmar arch

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Artery: Superficial palmar arch
Gray1237.svg
Palm of left hand, showing position of skin creases and bones, and surface markings for the volar arches.
Latin Arcus palmaris superficialis,
arcus volaris superficialis
Gray's p.598
Source Ulnar (primarily), Superficial palmar branch of the radial artery
Branches Common palmar digital
Vein Superficial palmar venous arch

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,[1] superficial ulnar arch, arcus palmaris superficialis,[2] or arcus volaris superficialis.[3]

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.

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Footnotes and references[edit]

  1. ^ Palmar and volar may be used synonymously, but volar is less common.
  2. ^ This is the official and international Latin term as defined by the Terminologia Anatomica (TA), but in English speaking countries and especially the US, superficial palmar arch is more commonly used.
  3. ^ Again, palmar and volar may be used synonymously, but arcus volaris superficialis does not occur in the TA, and can therefore be considered deprecated.

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This article incorporates text from a public domain edition of Gray's Anatomy.