Abstract

Introduction: The lateral cord of brachial plexus is formed from the anterior divisions of upper and middle trunks, formed from roots C5, C6 and C7. Variations in the formation and branching of lateral cord are not uncommon. Considering its variations, a detailed knowledge is necessary to neurosurgeons, anaesthetists and orthopedicians to avoid complications. Materials and Methods: The present study was conducted in the Department of Anatomy, Mamata Medical College, Khammam. 70 formalin fixed upper limbs [35 cadavers] were dissected for a period of 5 years. Formation and branching of lateral cord of brachial plexus were observed and variations are taken into consideration. Observations: Out of 70 limbs dissected, we observed communication between the lateral cord and medial root of median nerve in 10 limbs. In 2 limbs musculo-cutaneous nerve was not formed. In 3 limbs musculo-cutaneous nerve did not pierce the coracobrachialis. In 7 limbs low union of medial and lateral roots of median nerve was observed. In 2 limbs, lateral pectoral nerve arises from upper trunk Conclusion: The lateral cord and its branches show variations more frequently than medial and posterior cords of brachial plexus.

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