Comparative Gross Anatomy of the Forelimb Arteries of the Japanese Monkey (Macaca fuscata) and a Comparative Pattern of Forelimb Arterial Distribution in Primates

Figure 1

Medial view of the shoulder and proximal part of the arm in Macaca fuscata. (a) Common pattern found in M. fuscata. (b) A variation of the distribution of the proximal arteries in the arm. The main difference is the origin of the profunda brachii from the brachial in (a) and from the common circumflexa humeri artery in (b). (c) A variation of the collateralis radialis artery; originates from the profunda brachii artery in (a) and from the brachialis artery in (c). (1) Axillary artery; (2) Circumflexa humeri communis, subscapularis, circumflexa scapulae, and thoracodorsalis; (3) Common trunk for the subscapularis, circumflexa scapulae, and thoracodorsalis; (4) Circumflexa humeri communis; (5) Thoracodorsalis; (6) Circumflexa scapulae; (7) Subscapularis; (8) Circumflexa humeri cranialis; (9) Profunda brachii; (10) Brachialis; (11) Collateralis ulnaris; (12) Collateralis radialis, white arrow indicates the same artery of 12, but with normal origin from the brachialis artery, muscular branch. The head black arrow indicates the circumflexa humeri caudalis. Name of muscles: (I) Coracobrachialis, (II) Biceps brachii caput brevis, (III) Triceps brachii caput mediale, (IV) Teres major, (V) Tendon of latissimus dorsi, (VI) Subscapularis.

(a)

(b)

(c)