Posterior Cord of Brachial Plexus and Its Branches: Anatomical Variations and Clinical Implication

Figure 2

Axillary nerve originates from posterior division of upper trunk and posterior cord in lateral relation of second part of axillary artery. C₅, C₆, C₇, C₈, T1-ventral rami of spinal nerve, UT-upper trunk, MD-middle trunk, LT-lower trunk, 1,2,3,-Posterior division of upper, middle and lower trunk, 4,5,6-anterior division of upper, middle and lower trunk, LC-lateral cord, PC-posterior cord, MCN-musculocutaneous nerve, MN-median nerve, RN-radial nerve, AN-axillary nerve, AA-axillary artery.