Body Of The Clavicle, Inferior View

Description

Clavicular shaft anatomy dominates this inferior view of the clavicle (collarbone), emphasizing the roughened undersurface rather than the smoother superior contour. Along the midshaft, the sulcus for the subclavius muscle runs longitudinally, positioned anterior to the posteroinferior ligamentous markings and aligned with the long axis of the bone. Medially, the costal (sternal) end transitions into the impression for the costoclavicular ligament on the inferior surface, while laterally the conoid tubercle rises on the posteroinferior aspect with the trapezoid line extending anterolaterally toward the acromial end. Bony texture tells the story. These inferior landmarks matter because they map the stabilizing restraints of the shoulder girdle: the costoclavicular ligament tethers the clavicle to the first rib, and the coracoclavicular ligament (conoid and trapezoid parts) suspends the scapula from the clavicle, resisting superior displacement seen in acromioclavicular separation. Fracture patterns and fixation planning also rely on this surface anatomy, since midshaft clavicle fractures are common and plate position must respect the subclavian groove, where the subclavius and the nearby subclavian vessels lie deep to the clavicle. For teaching, the fixed inferior perspective makes it easier to distinguish the posterolateral conoid tubercle from the more anterior trapezoid ridge, a frequent point of confusion in osteology labs. Use this illustration in upper limb anatomy courses, orthopedic exam preparation, and surgical atlases discussing clavicle fractures, coracoclavicular reconstruction, and AC joint injury classification. It also fits radiology teaching files that correlate palpable landmarks with inferior-surface features on CT or 3D reconstructions. Anatomical accuracy verified by SciePro's Medical Advisory Board.