Sternoclavicular Joint Flashcards
What type of joint is the sternoclavicular joint
Saddle type synovial joint
What are the articulating surfaces of the sternoclavicular joint
Sternal end of clavicle
Manubrium of sternum
Part of 1st costal cartilage
What covers the articular surfaces of the sterno clavicular joint
Fibrocartilage
What does the sternoclavicular joint capsule consist of
Fibrous outer layer
Inner synovial membrane
Where does the fibrous layer of the sternoclavicular joint extend
From epiphysis of sternal end of clavicle to borders of articular surfaces and articular disc
What are the major ligaments of the sternoclavicular joint
Sternoclavicular ligaments (anterior and posterior)
Interclavicular ligament
Costoclavicular ligament
What role do the anterior and posterior sternoclavicular ligaments play
Strengthen the joint capsule anteriorly and posteriorly
Where is the interclavicular ligament and what is its role
Spans the gap between sternal ends of each clavicle
Reinforces joint capsule superiorly
Where is the costoclavicular ligament
Bind 1st rib and cartilage inferiorly to anterior and posterior borders of clavicle superiorly
What is the role of the costoclavicular ligament
Very strong ligament
Main stabilising force for joint
Resists elevation of pectoral girdle
What is the arterial supply to the sternoclavicular joint
Internal thoracic artery
Suprascapular artery
What nerve/s innervate sternoclavicular joint
Medial supraclavicular nerve (C3 and C4)
Nerve to subclavius (C5 and C6)
What movements require sternoclavicular joint movement
Shoulder: Elevation Depression Protraction Retraction Rotation
What factors contribute to mobility of the sternoclavicular joint
Saddle joint
Articular disc
What factors contribute to the stability of the sternoclavicular joitn
Strong joint capsule
Strong ligaments - particularly costoclavicular ligament
