Lateral Perspective of the Long Thoracic Nerve

Description

Seen from the lateral thoracic wall of an adult male, the long thoracic nerve (C5 to C7) descends on the superficial surface of the serratus anterior, running inferiorly along the midaxillary line toward the lower digitations. Proximally it tracks posterior to the clavicle and near the medial border of the scapula, with the deltoid and pectoralis major forming the anterior shoulder contour and the trapezius lying posterior and superior over the scapular spine. A slender course. Regional vessels of the axilla and lateral thorax sit deep to the pectoral girdle, providing familiar landmarks for the nerve’s path as it approaches the serratus anterior slips on the ribs. Lateral visualization matters because long thoracic nerve injury produces medial scapular winging from serratus anterior paralysis, a deficit that becomes obvious during wall push-up testing and complicates overhead elevation by disrupting scapulothoracic upward rotation. Iatrogenic injury remains a real concern during axillary lymph node dissection and mastectomy when dissection extends along the chest wall, and traction neurapraxia can follow vigorous overhead activity or blunt shoulder girdle trauma. The nerve’s long, superficial course also explains its vulnerability to compression and stretch where it crosses the lateral chest wall. Use this artwork in anatomy teaching on the brachial plexus and scapular stabilizers, in surgical education for breast and axillary approaches, or in sports medicine and neurology materials addressing scapular dyskinesis and winging. It also supports textbook and patient-facing diagrams that need a clear lateral relationship between serratus anterior, scapula, and the long thoracic nerve. Anatomical accuracy verified by SciePro's Medical Advisory Board.