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Glenohumeral Joint
From WikiSM

Illustration of the glenohumeral joint[1]
Description
- Defined by the articulation of the head of the Humerus and the glenoid cavity of the Scapula
- Classified as a synovial "ball and socket" joint
- Sometimes referred to as a golf ball and a tee
- Static stabilizers
- Bony structures
- Ligaments
- Negative intra-articular pressure
- Dynamic Stabilizers
- Muscles
- Rotator Cuff
- Long head of the Biceps Brachii
- Periscapular muscles
- Muscles
Function
- Geometry provides functional benefit by allowing for a broad arc of motion
- However, only 25% of the humeral head is in contact with the glenoid at any point in the arc of motion[2]
- Compromise is potential instability
Vascular Supply
- Anterior Circumflex Humeral Artery
- Posterior Circumflex Humeral Artery
- Suprascapular Artery
- Scapular Circumflex Artery