The shoulder joint is the articulation between the thorax and the arm.
The glenoid fossa is covered with a smooth cartilage called the labrum.
Shoulder Muscles
There are 17 muscles that cross the shoulder joint.
Verywell / Alexandra Gordon
Theperiscapularmuscles help to control the movements of the shoulder blade.
This movement is critical to normal shoulder function.
The muscles of the rotator cuff are the supraspinatus, infraspinatus, teres minor, and subscapularis.
When the rotator cuff is inflamed or irritated, this is referred to as rotator cuff tendonitis.
When the tendons of the rotator cuff have torn, this is called a rotator cuff tear.
Shoulder Capsule
The shoulder capsule surrounds the ball-and-socket part of the shoulder joint.
The capsule separates the joint from the rest of the body and contains the joint fluid.
When the shoulder dislocates, the ligaments of the shoulder capsule can be torn.
The labrum also serves as the attachment of a major tendon in the shoulder, the biceps tendon.
These movements include:
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