Acromioclavicular joint Flashcards
What type of joint is the AC joint?
Synovial joint
Plane type
What are the articulating surfaces of the AC joint?
Lateral end of clavicle, acromial facet
Acromion of scapula
What are the articulating surfaces covered with?
Fibrocartilage
What extra structure is contained within the joint cavity?
An articular disk
What is an articular disk?
Wedge of fibrocartilage
Where does the articular disk come from?
Suspended from upper part of joint capsule
What reinforces the posterior aspect of the joint capsule?
Trapezius muscle
What are the ligaments of the AC joint?
Acromioclavicular ligament
Conoid ligaent
Trapezoid ligament
Where does the acromioclavicular ligament attach to?
Lateral clavicle
Acromion of scapula
Where does the acromioclavicular ligament lie?
Above the joint capsule
What reinforces the superior aspect of the joint capsule?
Acromioclavicular ligament
Where does the conoid ligament attach?
Coracoid process
Conoid tubercle of clavicle
Where does the trapezoid ligament attach?
Coracoid process
Trapezoid line of clavicle
The acromioclavicular ligament runs in a … direction?
Horizontal
The conoid and trapezoid ligaments run in a … direction?
Vertical
