Acromioclavicular Joint Flashcards
What type of joint is the acromioclavicular joint
Plane type synovial joint
What forms the acromioclavicular joint
Lateral end of clavicle
Acromion of scapula
What lines the articular surfaces of the acromioclavicular joint
Fibrocartilage
What forms the capsule of the acromioclavicular joint
Loose fibrous layer
What reinforces the posterior aspect of the joint capsule
Fibres from the trapezius muscle
What are the major ligaments present in the acromioclavicular joint
Acromioclavicular
Conoid
Trapezoid
Where is the acromioclavicular ligament
Runs horizontally from acromion to lateral clavicle
Covers joint capsule
Reinforces superior aspect
Where is the conoid ligament
Runs vertically from coracoid process of scapula to conoid tubercle of clavicle
Where is the trapezoid ligament
Runs from coracoid process of scapula to trapezoid line of clavicle
What is the coracoclavicular ligament
Collective term for conoid and trapezoid ligament
What is the arterial supply to the acromioclavicular joint
Suprascapular artery
Thoraco-acromial artery
Where does the suprascapular artery arise from
Subclavian artery at the thyrocervical trunk
Where does the thoraco-acromial artery arise from
Axillary artery
What nerve/s innervate the acromioclavicular joint
Articular branches of :
Suprascapular
Lateral pectoral
(Both arise directly from brachial plexus)
What movements does the acromioclavicular joint allow
Axial rotation
Anteroposterior movement
(All movement is passive)
