Acromion
Acromion (pronunciation: /əˈkroʊmiən/) is a bony process on the scapula (shoulder blade). Together with the coracoid process, it extends laterally over the shoulder joint. The acromion is located at the superior end of the spine of the scapula and makes up the highest point of the shoulder.
Etymology
The term "acromion" comes from the Greek words "akros", which means "highest", and "omos", meaning "shoulder". Thus, the term literally translates to "highest point of the shoulder".
Anatomy
The acromion articulates with the clavicle (collar bone) to form the acromioclavicular joint. It serves as an attachment site for various muscles and ligaments, including the deltoid muscle and the trapezius muscle. The shape and structure of the acromion can vary among individuals, and this variation can influence the biomechanics of the shoulder joint.
Clinical Significance
The acromion is clinically significant in the context of shoulder injuries and disorders. For example, a downward or forward curvature of the acromion can lead to impingement syndrome, a condition where the tendons of the rotator cuff muscles become compressed. This can cause pain and limit shoulder mobility.
Furthermore, fractures of the acromion, while relatively rare, can occur due to direct trauma to the shoulder. Such fractures are typically managed with conservative treatment, but surgery may be required in severe cases.
Related Terms
- Scapula
- Clavicle
- Acromioclavicular joint
- Deltoid muscle
- Trapezius muscle
- Impingement syndrome
- Rotator cuff
External links
- Medical encyclopedia article on Acromion
- Wikipedia's article - Acromion
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