Anterior Perspective of the Arteries of the Chest and Upper Arm

Description

Prominent in the anterior thorax, the left subclavian artery courses laterally beneath the clavicle and over the first rib, continuing as the axillary artery as it enters the axilla. From the axillary segment, the vessel descends along the medial aspect of the proximal humerus toward the brachial artery, with early branches suggested toward the shoulder girdle and thoracic wall. Surrounding skeletal landmarks include the clavicle anteriorly, the ribs and costal cartilages forming the anterior thoracic cage, and the lateral border of the scapula framing the proximal limb. Orientation stays firmly left sided. Clear depiction of the subclavian to axillary transition matters because it sits at the intersection of thoracic outlet anatomy and upper-extremity perfusion, where compression can occur between the clavicle and first rib or beneath pectoralis minor, producing arterial thoracic outlet syndrome with post-stenotic dilation or distal embolization. It also maps the operative corridor for axillary artery exposure during trauma control, bypass, or aneurysm repair, where the vessel’s relationship to the humerus and shoulder girdle guides incision planning and retraction. Bony context makes the course intuitive. Landmarks stay honest. Use this plate in gross anatomy and regional anatomy teaching to anchor the named segments of the upper-limb arterial tree and their surface projections at the root of the neck and axilla. It also fits vascular surgery and emergency medicine materials discussing proximal upper-extremity hemorrhage control, catheter access planning, and collateral circulation around the shoulder following subclavian or axillary occlusion. Anatomical accuracy verified by SciePro's Medical Advisory Board.