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. 2023 Jun 23;15(6):e40852. doi: 10.7759/cureus.40852

Figure 1. Branching variations and anteromedial course of the left AA in relation to the brachial plexus.

Figure 1

Asterisks (*) indicate branches that were severed during the dissection. Nerve structures are painted yellow, arterial structures painted red, muscles labeled in blue font, and dashed blue lines indicate the boundaries of the parts of the AA. Directional indication is provided in the lower left corner. (a) A close-up of MB2, an accessory branch to the subscapularis muscle. (b) A close-up of the CSA.

AA: axillary artery; ACHA: anterior circumflex humeral artery; ATA: alar thoracic artery; BA: brachial artery; CSA: circumflex scapular artery; CT1; common trunk 1; CT 2: common trunk 2; LPN: lateral pectoral nerve; LTA: lateral thoracic artery; MB1: muscular branch 1, seen coursing to the clavicular region; MB2: muscular branch 2, seen piercing the subscapularis muscle; MB3: muscular branch 3, an accessory lateral thoracic branch; MB4: muscular branch 4, an accessory pectoral branch; MCN: musculocutaneous nerve; MCNA: medial cutaneous nerve of the arm; MN: median nerve; PBA: profunda brachii artery; PCHA: posterior circumflex humeral artery; RN: radial nerve; SSA: subscapular artery; STA: superior thoracic artery; TAA: thoracoacromial artery; TDA: thoracodorsal artery; UN: ulnar nerve.