Lateral Cord of the Brachial Plexus, Anterior View

Description

Oriented in anterior anatomical position at the shoulder girdle, the lateral cord (fasciculus lateralis) of the brachial plexus is shown lateral to the axillary artery region, formed by the anterior divisions of the superior and middle trunks. From this cord, the musculocutaneous nerve departs and passes inferolaterally toward the coracobrachialis, while the lateral root of the median nerve courses medially to meet the medial root and complete the median nerve anterior to the axillary artery. Surrounding bony landmarks include the clavicle, proximal humerus with its head and surgical neck, the scapula with the glenoid region, and adjacent ribs framing the thoracic wall. Clean relationships. Anterior visualization of the lateral cord matters because it is the roadmap for lesions and exposures around the infraclavicular plexus and axilla, where cords are named by their relationship to the axillary artery rather than to the trunks in the supraclavicular fossa. A lateral cord injury or compression, classically from upper trunk involvement, can weaken elbow flexion and forearm supination via musculocutaneous fibers and contribute to median-nerve pattern deficits when the lateral root is compromised. This is the view you want when teaching why the median nerve is assembled from two roots and why anatomic variants can complicate nerve blocks and axillary surgery. Suitable for upper-limb anatomy teaching in gross lab and neuroanatomy modules, as well as for surgical atlases covering infraclavicular brachial plexus approaches, axillary lymph node dissection, and shoulder trauma correlations at the surgical neck of the humerus. It also supports anesthesia education when explaining landmarks for infraclavicular plexus blocks and the proximity of neural elements to the axillary vessels. Anatomical accuracy verified by SciePro's Medical Advisory Board.