Yoshinaga Kazuya, Kodama Kodo, Kameta Katsuharu, Karasawa Natsuko, Kanenaka Naosuke, Kohno Sayaka, Suganuma Tatsuo
Department of Anatomy I, Miyazaki Medical College, Kiyotake, Miyazaki 889-1692, Japan.
Okajimas Folia Anat Jpn. 2003 May;80(1):23-7. doi: 10.2535/ofaj.80.23.
A rare variation in the arterial pattern was found in the right arm of an 87-year-old male cadaver in a student dissection practice. In this case, the superficial brachial and superficial subscapular arteries coexisted in the absence of the normal brachial artery (A. brachialis profunda). After branching off a large-sized superficial subscapular artery, the axillary artery did not penetrate the brachial plexus and gave rise to a superficial brachial artery, which arose from the axillary artery at the point between the ansa pectoralis and ansa mediana, and descended ventral to the median nerve branching off the profunda brachii and superior and inferior ulnar collateral arteries. The superficial brachial artery finally divided into the radial and ulnar arteries in the cubital fossa. The superficial subscapular artery passed inferior and dorsal to the medial cord of the brachial plexus, giving off the lateral thoracic artery, and then branched off into the thoracodorsal, circumflex scapular and posterior circumflex humeral arteries. Thus the main nerves of the brachial plexus were sandwiched between the superficial brachial artery and the superficial subscapular artery system. The morphological and clinical significance of this variant are discussed.
在一次学生解剖实习中，在一名87岁男性尸体的右臂发现了一种罕见的动脉模式变异。在这种情况下，肱浅动脉和肩胛下浅动脉共存，而正常的肱深动脉缺如。腋动脉在分出一条粗大的肩胛下浅动脉后，未穿过臂丛，而是发出一条肱浅动脉，该动脉在胸肌袢和正中袢之间的位置发自腋动脉，并在肱深动脉分出的正中神经以及尺侧上副动脉和尺侧下副动脉的腹侧下行。肱浅动脉最终在肘窝处分为桡动脉和尺动脉。肩胛下浅动脉在臂丛内侧束的下方和背侧走行，发出胸外侧动脉，然后分支为胸背动脉、旋肩胛动脉和旋肱后动脉。因此，臂丛的主要神经夹在肱浅动脉和肩胛下浅动脉系统之间。本文讨论了这种变异的形态学和临床意义。
