Male Brachial Plexus

Description

Arising from the anterior rami of C5 to T1, the male brachial plexus is traced as a nerve network coursing laterally through the posterior triangle of the neck toward the root of the axilla. Roots and trunks sit superior and posterior to the clavicle, while divisions pass deep to the clavicle at the cervicoaxillary canal and reorganize into cords named for their relationship to the axillary artery. Distally, terminal branches continue into the proximal arm alongside the humerus, framed by the scapulae and rib cage in an anterior trunk presentation. Bony landmarks are clear. Clinical teaching often hinges on where the plexus narrows and turns. This trajectory is the anatomic basis for traction injuries at Erb’s point (upper trunk, C5 to C6) after shoulder depression, and for compression or stretch at the thoracic outlet where neurovascular structures traverse between the clavicle and first rib near the scalene triangle. Regional anesthesia also depends on this topography, since interscalene blocks target roots and trunks in the neck while infraclavicular and axillary approaches align with cords and terminal branches around the axillary artery. A practical roadmap. Use this artwork to support gross anatomy and neuroanatomy lectures on peripheral nerve organization (roots, trunks, divisions, cords, branches), or to accompany surgical and anesthesia texts describing brachial plexus exploration, thoracic outlet decompression, and upper limb nerve injury patterns. It also fits clinical education materials that correlate dermatomes, myotomes, and peripheral nerve deficits with proximal plexus anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.