Anatomical Structure and Location of the Lateral Branches of the Intercostal Arteries, Posterior View

Description

Posterior thoracic wall anatomy is rendered in a male figure with the trapezius draped superiorly and the latissimus dorsi spanning the lower back toward the humerus, leaving the scapular region framed by infraspinatus and the teres major and minor. Segmental intercostal arteries are seen coursing laterally within each intercostal space, then giving off lateral branches that spiral toward the lateral thoracic wall between the ribs. Vessels track deep to the superficial musculature and parallel the expected rib orientation, with venous channels accompanying the arterial paths. Emphasis on the lateral branches matters because they mark the transition from the paravertebral segmental circulation to the lateral chest wall supply, a frequent source of bleeding when the intercostal space is entered too posteriorly or the neurovascular bundle is caught along the inferior rib margin. Chest tube placement, posterolateral thoracotomy, and VATS port insertion all depend on respecting the intercostal neurovascular plane, and this posterior view helps clarify where a lateral branch may be encountered as it leaves the costal groove region and traverses the muscular layers. Small vessel. Big consequence. Educators can drop this plate directly into gross anatomy labs when teaching the thoracic wall, or into surgical anatomy modules on safe intercostal access and hemostasis. It also suits textbook and journal figures discussing posterior thoracic soft tissue flaps, segmental vessel preservation, or complications such as intercostal artery injury during pleural procedures. Anatomical accuracy verified by SciePro's Medical Advisory Board.