Shoulder Joint Flashcards
What is the blood supply to the shoulder joint
Anterior and superior circumflex humeral arteries
Suprascapular artery
What is the nerve supply to the shoulder joint
Lateral pectoral
Suprascapular
Axillary
What are the major bursae in the shoulder joint
Subscapular
Subacromial
What are the rotator cuff muscle
Subscapularis
Supraspinatus
Infraspinatus
Teres minor
What covers the articular surfaces of the glenohumeral joint
Hyaline cartilage
What is the glenoid labrum
Fibrocartilage rim that deepens the glenoid fossa
Where does the joint capsule extend
From anatomical neck of humerus to border of glenoid fossa
What lines the inner surface of the joint capsule
Synovial membrane
Where is the subacromial bursa located
Inferiorly to deltoid and acromion
Superiorly to supraspinatus tendon and joint capsule
What does the subacromial bursa do
Supports deltoid and tendon of suprspinatus
Where is the subscapular bursa located
Between subscapularis tendon and scapula
What does the subscapular bursa do
Reduces wear and tear on tendon during movement at shoulder joint
What are the ligaments of the shoulder joint
Glenohumeral ligaments (superior, middle and inferior) Coracohumeral ligament Transverse humeral ligament Coraco-clavicular ligament Coraco-acromial ligament
What do the glenohumeral ligaments do
Connect humerus to glenoid fossa
Form joint capsule
Main source of stability
Stabilise anterior aspect of joint
Where is the coracohumeral ligament
Attaches base of coracoid process to greater tubercle of humerus
What does the coracohumeral ligament do
Supports superior part of joint capsule
Where is the transverse humeral ligament
Spans distance between two tubercles of humerus
What does the transverse humeral ligament do
Holds tendon of long head of biceps in intertubercular groove
Where is the coracoacromial ligament
Runs between acromion and coracoid process of scapula (forming coraco-acromial arch)
What does the coracoacromial ligament do
Prevents superior displacement of humeral head
What is the most important ligament that contributes to stability of shoulder joint
Inferior glenohumeral ligament
