Acromioclavicular Joint Flashcards
Joint classification, how the joint achieve stability, movements and muscles, innervation and blood supply, what can go wrong and how to tell on examination.
Classify the acromioclavicular joint structurally and functionally.
Structurally - synovial, functionally - plane type.
What are the articulating surfaces in the acromioclavicular joint?
Lateral clavicle and acromion of scapula.
Which ligaments help achieve stability of the acromioclavicular joint?
Acriomioclavicular ligament, coracoclavicular ligament.
Where is the acromioclavicular ligament?
Acromion to lateral clavicle, superior.
Where is the coracoclavicular ligament?
From coracoid process of scapula to conoid tubercle of clavicle and trapezoid line of clavicle.
What are the movements of the acromioclavicular joint?
Axial rotation, anteroposterior movement.
Which muscles act on the acromioclavicular joint?
None, all passive movement.
Which arteries supply the acromioclavicular joint?
Suprascapular arteriy, thoraco-acromial artery.
Which nerves innervate the acromioclavicular joint?
Suprascapular and lateral pectoral nerves.
What is the mechanism of injury of acromioclavicular dislocations?
Direct blow to joint or FOOSH.
What is the appearance of acromioclavicular dislocations?
More prominent clavicle.
