1. Its lateral border is thick and irregular, and presents three or four tubercles for the tendinous origins of the Deltoideus. Its medial border, shorter than the lateral, is concave, gives attachment to a portion of the Trapezius, and presents about its center a small, oval surface for articulation with the acromial end of the clavicle.

Hier liegt eine flache, knorpelbedeckte Gelenkpfanne, die Cavitas glenoidalis, die mit dem Humeruskopf artikuliert.