Arterial branches: the brachial profundal artery and the superior ulnar col-lateral artery originate directly from the axillary or brachial artery in 47.88% of 330sides.
Contrast-enhanced MR angiogram shows the proper digital vessels, with the ulnarartery to the second digit (straight arrow) coursing toward a small enhancing lesion in the fingertip (curved arrow).
增强磁共振血管成像显示由尺动脉发出的食指固有动脉（直箭头）朝着指尖小的强化病灶（弯箭头）。
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Inferior ulnar collateral artery and posterior ramus of ulnar recurrent artery formed rich artery network with superior ulnar collateral artery in the ulnar epineurium.