|Plan of ossification of the scapula. From seven centers. (Acromion visible at upper left, in blue.)|
|Left scapula. Lateral view. (Acromion labeled at upper right.)|
|Gray's||subject #50 203|
It is a continuation of the scapular spine, and hooks over anteriorly.
The acromion forms the summit of the shoulder, and is a large, somewhat triangular or oblong process, flattened from behind forward, projecting at first lateralward, and then curving forward and upward, so as to overhang the glenoid cavity.
- Its superior surface, directed upward, backward, and lateralward, is convex, rough, and gives attachment to some fibers of the Deltoideus, and in the rest of its extent is subcutaneous.
- Its inferior surface is smooth and concave.
- 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.
- acromion at eMedicine Dictionary
- Bioweb at UWLAX aplab
- Anatomy at Dartmouth shoulder/selftests/surface2
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