Middle Trunk of the Brachial Plexus, Anterior View

Description

Arising from the C7 ventral ramus, the middle trunk of the brachial plexus is shown in anterior perspective as it courses laterally in the lower neck toward the supraclavicular fossa. Proximally, it lies posterior to the clavicles and superior ribs, then approaches the interval between the anterior and middle scalene muscles before continuing toward its anterior and posterior divisions. Carotid arteries and internal jugular veins run vertically in the neck as adjacent vascular landmarks, while the mandible, skull base, and upper thoracic cage provide fixed bony reference. Orientation is unambiguous. This anterior framing matters because C7-derived symptoms are often confused with C6 or C8 patterns, and the middle trunk becomes a practical teaching target when you want to connect root-level radiculopathy to plexus-level lesions. Stretch or compression in the scalene triangle or beneath the clavicle can preferentially stress the plexus during traction injuries, and this is the same corridor interrogated during evaluation of thoracic outlet syndrome and post-traumatic brachial plexopathy. The relationship to the great vessels also helps clarify why operative exposure and regional anesthesia in the supraclavicular region demand disciplined surface and deep landmarking. Small space, high stakes. Use this plate for neuroanatomy and gross anatomy teaching when tracing C7 from root to trunk, and for surgical education modules covering supraclavicular brachial plexus exploration, clavicular fracture displacement, or scalene-related entrapment patterns. It also supports atlas figures and review articles that need a clean anterior correlation between plexus elements, cervical skeleton, and the carotid sheath. Anatomical accuracy verified by SciePro's Medical Advisory Board.