Sternoclavicular

Sternoclavicular joint is the articulation of the sternum (breastbone) and the clavicle (collarbone). It is a synovial joint, meaning it is surrounded by a thick, fluid-filled capsule. This joint is one of the four joints that complete the shoulder.

Anatomy

The sternoclavicular joint is composed of two bones: the sternal end of the clavicle and the manubrium of the sternum, and the first costal cartilage. The joint is covered by a capsule and supported by ligaments.

Ligaments

There are four ligaments that are associated with the sternoclavicular joint:

• Anterior sternoclavicular ligament
• Posterior sternoclavicular ligament
• Interclavicular ligament
• Costoclavicular ligament

Function

The sternoclavicular joint allows for a wide range of movements of the pectoral girdle, including protraction, retraction, elevation, depression, and slight rotation to aid in the movement of the shoulder.

Clinical significance

Injuries to the sternoclavicular joint are relatively rare due to its strength and deep location. However, when they do occur, they can be serious and potentially life-threatening. Conditions that can affect the sternoclavicular joint include:

• Sternoclavicular joint dislocation
• Sternoclavicular joint arthritis
• Sternoclavicular joint infection

See also

• Shoulder joint
• Acromioclavicular joint
• Scapulothoracic joint

References

Sternoclavicular Resources
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