Tuberosity For The Coracoclaviculae Ligament In An Inferior View Of The Clavicle

Description

Coracoclavicular tuberosity on the inferior surface of the clavicle anchors the coracoclavicular ligament complex, with the conoid tubercle (tuberculum conoideum) lying more posteromedial and the trapezoid line (linea trapezoidea) extending anterolaterally toward the acromial end. From this inferior perspective, the rugged bony relief stands out against the flatter adjacent shaft, and the acromial end sits laterally while the sternal end lies medial. Just inferior to the midshaft, the subclavian groove (sulcus musculi subclavii) typically courses anteroposterior, while the costoclavicular impression (impressio ligamenti costoclavicularis) is positioned more medially near the sternal end. A hard landmark. Clinically, this is the footprint that matters in acromioclavicular (AC) joint trauma: disruption of the conoid and trapezoid components drives vertical instability in Rockwood type III to VI separations, and reduction strategies often key off restoring the clavicle to its relationship with the coracoid via coracoclavicular reconstruction. The inferior view is also the surgeon’s map during coracoclavicular button fixation or suture loop techniques, where tunnel placement too anterior risks trapezoid malposition and too posterior can threaten the conoid footprint and invite posterior cortical blowout. The texturing and lighting around the tuberosity help discriminate ligament attachment bone from the smoother subclavian groove, a distinction that supports accurate labeling and avoids confusing muscle and ligament insertion sites. Use this illustration in shoulder girdle anatomy lectures, orthopaedic operative atlases addressing AC separation and coracoclavicular stabilization, and radiology teaching files when correlating CT or 3D reconstructions of the clavicle with ligament attachment landmarks. Anatomical accuracy verified by SciePro's Medical Advisory Board.