Physically, the acromion process (or just acromion) is a projection of the
spine of the scapula. The acromion is an important landmark of the scapula because it is the
articulating surface for the scapula of the acromioclavicular joint. It articulates
with the acromial end (distal end) of the clavicle. This is an unusual
gliding joint (biaxial) in that it allows for gliding (anteroposterior and
vertical) and some axial rotation of the scapula. The joint capsule of
this joint is made stronger by two ligaments, the small acromioclavicular
ligament on the vertical surface of the bones and the larger coracoclavicular
ligament (two parts) between the coracoid process and the inferior surface of
the clavicle. The acromion process of the scapula is the insertion for:
1. the superior portion of the trapezius.
The acromion process of the scapula is the origin for:
1. the middle portion of the deltoid.
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2005 by William Johnson II
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