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The Heart (HT)
Published in Narda G. Robinson, Interactive Medical Acupuncture Anatomy, 2016
Superficial palmar arch: This constitutes the main termination of the ulnar artery. The superficial palmar arch gives rise to three common palmar digital arteries. These arteries anastomose with the palmar metacarpal arteries, which arise from the deep palmar arterial arch. In contrast to the superficial palmar arch which arises mainly from the ulnar artery, the radial artery provides the main arterial basis for the deep palmar arch. The superficial and deep palmar arterial arches serve as the main sources of blood supply to all structures in the human hand. Preservation of fetal arteries in dominant hands may account for the preservation of complete superficial arterial arches into adulthood.5
The Hand
Published in Gene L. Colborn, David B. Lause, Musculoskeletal Anatomy, 2009
Gene L. Colborn, David B. Lause
Superficial Palmar Arterial Arch. Identify and clean the superficial palmar arterial arch. The superficial arch is a continuation of the superficial branch of the ulnar artery. Three common palmar digital arteries typically arise from the arch and anastomose near the webs of the fingers with the metacarpal branches from the deep palmar arterial arch.
Spontaneous necrosis of a single digit: watershed necrosis
Published in Case Reports in Plastic Surgery and Hand Surgery, 2021
Alain J. Azzi, Gabriel Bouhadana, Fanyi Meng, Peter G. Davison
Classically, the radial and ulnar arteries enter the hand and anastomose across the palm to form the superficial and deep palmar arches. Normally, the main supply of the deep palmar arch (DPA) is the radial artery, whereas the superficial palmar arch (SPA) is ulnar-dominant. The DPA usually branches to form the princeps pollicis and the radial digital artery of the second digit. The SPA gives off the ulnar digital artery of the fifth digit and the common palmar digital arteries in the second, third and fourth web spaces. Vascular redundancy and interconnections render the blood supply to the hand and digits robust. Examples include interconnections between the deep and superficial arches, between the palmar metacarpal arteries and the digital arteries, between the dorsal metacarpal arteries and the digital arteries, etc. Anatomical variations are common and do not usually pose a risk to digit blood supply due to this network of interconnections. We present a case of spontaneous ‘watershed’ necrosis of a single digit caused by arterial disease, a pathology that would have otherwise been benign in patients with normal anatomy. To our knowledge, this mechanism of digit necrosis has yet to be reported in the literature.