Clavicula
Clavicula
The Clavicula (pronounced kla-vik-yuh-luh), also known as the collarbone, is a long bone that serves as a strut between the shoulder blade and the sternum or breastbone. There are two clavicles, one on the left and one on the right. The clavicle is the only long bone in the body that lies horizontally. Together with the shoulder blade, it makes up the shoulder girdle.
Etymology
The term "clavicula" is derived from the Latin word clavis, which means key. This is due to the bone's key-like shape.
Anatomy
The clavicula has a complex curvature, a characteristic that is important for its function. It is gently curved, with its medial end articulating with the manubrium of the sternum and its lateral end articulating with the acromion of the scapula.
Function
The clavicula serves several functions. It acts as a flexible, craniocaudal strut that allows the scapula to move freely on the thoracic wall. It elevates the scapula when the shoulder is abducted. When the shoulder is adducted, it depresses the lateral end of the scapula. It also protects the underlying neurovascular structures supplying the upper limb.
Related Terms
- Acromioclavicular joint: The joint at the top of the shoulder, where the acromion and the clavicula meet.
- Sternoclavicular joint: The joint where the sternum and the clavicula meet.
- Clavicle fracture: A break in the clavicle, commonly known as a broken collarbone.
External links
- Medical encyclopedia article on Clavicula
- Wikipedia's article - Clavicula
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