Abstract

Introduction: Coracobrachialis muscle is well known for its morphological variations. Anatomical variation of coracobrachialis near its insertion can cause compression of median nerve and brachial artery by mimicking struther’s ligament. Our aim of the study was to examine and record the variations in origin and insertion of coracobrachialis muscle and to see their relationship with the median nerve and brachial artery. Methodology: During routine dissection for undergraduate students in KFMSR, 64 upper limbs were dissected and observed for any variations in origin and insertion of Coracobrachialis muscle. Results: Of the 64 upper limbs dissected, we noted that in one cadaver, there were two heads of origin for coracobrachialis muscle and there was also a variation in the insertion as abnormal slips, which were attached to antebrachial fascia. The blood supply to this muscle was from the muscular branches of superficial brachial artery. Conclusion: The knowledge of this type of variations is important for surgeons, radiologists, neurologists and physiotherapists for proper decision making during surgical considerations and injuries around elbow joint. Neurovascular structures like median nerve and superficial brachial artery may be compressed by the abnormal slips of coracobrachialis close to insertion.

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