GHJ
subscapularis innervation
lower and upper subscapular nn
teres major innervation
lower subscapular nn
pectoralis major innervation
medial and lateral pectoral nn
GHJ ABduction muscles
supraspinatus (first 15 degrees) deltoid (after first 15 degrees)
latissimus dorsi innervation
thoracodorsal nn
rotator cuff injuries
inflammation pain tears impingement irritation tendonitis rupture repetitive use can lead to injuries
infraspinatus innervation
suprascapular nn
supraspinatus innervation
suprascapular nn
deltoid innervation
axillary nn
teres minor innervation
axillary nn
GHJ joint type
ball and socket synovial joint with glenoid labrum
GHJ location
between glenoid cavity and head of humerus reinforced by the muscles of rotator cuff
transverse humeral ligament
between greater and lesser tubercles holds biceps long head tendon in place
GHJ ligament type
capsular ligament reinforces and strengthens capsule
GHJ ligaments
coracohumeral ligament glenohumeral ligament transverse humeral ligament coracoacromial ligament
coracohumeral ligament
coracoid to humerus
GHJ external rotation muscles
deltoid infraspinatus teres minor
GHJ internal rotation muscles
deltoid pectoralis major latissimus dorsi teres major subscapularis
GHJ extension muscles
deltoid latissimus dorsi long head triceps brachii
GHJ flexion muscles
deltoid pectoralis major coracobrachialis biceps brachii
coracoacromial ligament
extracapsular ligament coracoid to acromion prevents superior displacement of humeral head
glenoid labrum
fibrocartilaginous ring that acts to deepen the glenoid cavity surrounds glenoid cavity
glenohumeral ligament
glenoid to humerus
GHJ dislocation
most dislocations occur in the inferior direction, but are described clinically as "anterior" or "posterior" dislocations to indicate the position of the humeral head relative to the infraglenoid tubercle of the scapula dislocation can endanger the musculocutaneous nerve and branches of axillary artery
biceps brachii innervation
musculocutaneous nn
coracobrachialis innervation
musculocutaneous nn
GHJ ADduction muscles
pectoralis major latissimus dorsi teres major subscapularis
long head triceps brachii innervation
radial nn
