Acromion Totally Explained

Everything about The Acromion totally explained

The acromion process, or simply the acromion, is an anatomical feature on the scapula.

In humans

It is a continuation of the scapular spine, and hooks over anteriorly.
The acromion articulates with the clavicle to form the acromioclavicular joint.
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.

Surfaces

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.

Borders

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.

In animals

The acromion process of bats (Mammalia: Chiroptera) is particularly elongated compared to that of humans.

Additional images

Image:Shoulderjoint.PNG|Diagram of the human shoulder joint Image:Gray326.png|The left shoulder and acromioclavicular joints, and the proper ligaments of the scapula. Image:Gray409.png|Muscles connecting the upper extremity to the vertebral column. Image:Human arm bones diagram.svg|Human arm bones diagram Further Information

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