Sternoclavicular Articulation Anatomy

Sternoclavicular Joint

• The sternoclavicular articulation is classified as a synovial saddle joint, allowing for a wide range of motion.
• It connects the sternum and clavicle, facilitating movements such as elevation, depression, protraction, and retraction of the shoulder.

Ligament Stabilization

• The main stabilizer of the sternoclavicular joint is the costoclavicular ligament, which anchors the clavicle to the first rib.
• This ligament plays a crucial role in preventing excessive movement and maintaining joint stability.

Acromioclavicular Joint

• The acromioclavicular (AC) joint is a type of synovial plane joint, allowing limited gliding and rotation.
• It connects the acromion process of the scapula with the clavicle, contributing to shoulder mobility and stability.

Glenoid Cavity Depth

• The glenoid cavity of the scapula is deepened by the glenoid labrum, a fibrocartilaginous structure.
• The labrum increases the surface area for the head of the humerus, enhancing joint stability and reducing the risk of dislocation.

Test your knowledge about the anatomy of the sternoclavicular articulation, including its joint type, ligaments, and stabilizers.