Acromion process is a part of the pectoral girdle. It is a small projection on the scapula bone. The clavicle articulates with the acromion process. It is also linked with the coracoid process.
Pectoral Girdle
The acromion process is one of the projections in the pectoral girdle. Pectoral girdle is a part of the appendicular skeleton. Pectoral girdle helps in articulation of the upper limb with the axial skeleton.
Pectoral girdle comprises two equal halves, each half is made up of two bones, scapula and clavicle. The main parts of the pectoral girdle are:
- Scapula – It is a triangular bone present between the second and seventh ribs at the dorsal part of the thorax.
- Clavicle – It is also called the collarbone. It is a long slender bone and has two curvatures.
- Spine – It is the elevated ridge on the dorsal side of the scapula bone.
- Acromion process – It is the projection of the spine.
- Glenoid cavity – The head of the humerus articulates with the glenoid cavity.
- Coracoid process – It is a hook-like projection attached to the clavicle over the glenoid cavity.
Acromion Process Characteristics
The acromion is the small process of the scapula. Some of the important points regarding acromion are as follows:
- The acromion is the flat, expanded projection of the spine.
- It is a triangular process that forms the top elevated portion of the shoulder.
- The clavicle articulates with the acromion process through the acromioclavicular joint.
- The coracoid process connects to the acromion by the coracoacromial ligament.
- It overhangs the glenoid cavity.
- The acromion process can be convex, flat, curved or hooked.
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