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A cadaveric study of variation of posterior cord of brachial plexus

Purpose: The purpose of the present study was to found variation in the branching pattern of posterior cord of brachial plexus for its clinical and surgical importance. Methods: The present study undertaken on 25 cadavers (50 upper limbs) in department of Anatomy, SBKS Medical Institute & Research Canter, Sumandeep Vidyapeeth, Piparia, Vadodara, Gujarat. The brachial plexus was dissected and exposed according to the methods described by Romanes in Cunningham’s Manual of Practical Anatomy. Results: Present study found that out of 50 limbs, 38(76%) limbs having classic branching pattern and 12(24%) limb having the variation in which 6(12%) limbs were having variation in order of branching and 6(12%) limbs were having variation in number of branches arising from posterior cord of brachial plexus. Also the study found that the latisimus dorsai muscles having dual nerve supply. 
Conclusions: Descriptions of nerve variations are useful in clinical and surgical practice, since an anatomical variation can be the cause of nerve palsy syndromes and vascular problems. In particular, anatomical variations of the human brachial plexus are very important to note during neck dissections, while managing axillary tumors, where these unusual distributions are prone to damage.