Structure of GH joint Flashcards
1
Q
Type of joint
A
Synovial ball and socket
2
Q
Location
A
Between humerus and scapula
3
Q
Degrees of freedom
A
Three
4
Q
Glenoid labrum
A
Arises from the margins of the acetabulum to provide depth to the socket
5
Q
Joint capsule
A
Attaches from the labrum and inserts towards anatomical neck of the humerus which provides some stability
6
Q
Ligaments
A
Superior, middle and inferior glenohumeral ligaments stabilise shoulder and prevent anterior dislocation
Coracoacromial and coracohumeral ligaments limit superior displacement of humeral head
7
Q
Function of rotator cuff muscles
A
Provide dynamic stability to the joint, keep the ball in the socket and rotate the humerus
Supraspinatus abducts, Infraspinatus and teres minor laterally rotate and subscapularis medially rotates
