[Vascularization of the ulnar nerve of the arm].

A review of 53 dissections associated with injections and radiographs was performed (by the authors) to specify the arteriovenous vascularization of the ulnar nerve of the arm. An arteriovenous pedicle is constantly to be found. The artery "collateralis ulnaris superior" arises from the inferior border of the "pectoralis major" at an average distance of 6,7 cm. The arterial depending vein most often directly rejoins the "vena brachialis" lower than "vena basilica" does, but usually more distally than the arterial emergence level. Thus constituted, the pedicle can be anastomosed, measuring generally more than 1 mm in diameter. The arterial distribution originates from an arcade parallel to the nerve from which arise some extremely fine ladderlike vessels. Finally, this pedicle vascularizes the whole brachial part of the nerve (roughly 23,6 cm).