Clavicle (English)

The clavicle is an S-shaped long bone that connects the upper limb to the trunk resting horizontally between the sternum and the acromion of the scapula. It consists of three main parts: the shaft, sternal end, and acromial end. The sternal end hosts the sternal articular surface (facet) that articulates with the manubrium of sternum, forming the sternoclavicular joint. The acromial end features the acromial articular surface (facet), which forms the acromioclavicular joint together with the acromion of the scapula. The superior surface of the clavicle is generally smooth and lies just deep to the skin. In contrast, its inferior surface is rough due to several important bony landmarks (namely attachments). From lateral to medial, the following can be observed: trapezoid line (attachment for the trapezoid ligament), the conoid tubercle (attachment for the conoid ligament), subclavian groove (attachment for the subclavius muscle), and impression for costoclavicular ligament (attachment for the ligament that binds the clavicle to the first rib).