BIOS1168 Lecture Notes - Lecture 2: Acromioclavicular Joint, Humerus, Clavicle
31 Jul 2018
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Document Summary
In contrast to the scapula, the clavicle develops in membrane. The clavicle is regarded as an irregular bone that is found in the appendicular part of the body. It is one of three bones associated with making up the pectoral girdle or the shoulder joint. The clavicle is composed of two ends; the sternal end which is involved in the sternoclavicular joint and the acromial end which is involved in the acromioclavicular joint. Inferiorly the clavicle has a groove that is associated with the subclavius muscle which attaches to the groove for subclavius. One of the roles of the clavicle is to keep the scapula more posteriorly placed so that it assists in the range of motion of shoulder movements. To orientate the clavicle, the sternal end smaller and more flattened whereas the acromial end is larger and more irregular in shape. The humerus like the scapula develops in cartilage.
