Anatomy of the Shoulder

Shoulder Treatment

An introduction to the anatomy of the shoulder

The anatomy of the shoulder is differ from other and has a unique formation. It is relatively an amazing flexibility and the range of the motion to the shoulder joint. The shoulder girdle is mainly made of glenohumeral joint and the chest (scapulothoracic) joint. The shoulder is basically like a ball and socket. Where the ball is the head of the humerus and the socket is the glenoid part of the shoulder blade known as scapula.

There is more complexity in interplaying between the joints, muscles, and with the ligaments, to achieve the flexibility and also to maintain the stable shoulder. If any injury occurs in any part of these structure may result in significant pain, weakness and instability. The scapula which is commonly known as the shoulder blade is a triangular shaped bone part called the glenoid and forms the “socket” for the head of the humerus. The ball and socket of the shoulder are enclosed by a “sock” of tissue, known as the joint capsule. If this sock of tissue becomes stiff, it may result in shoulder stiffness and pain known as frozen shoulder (adhesive capsulitis). The coracoid process is a bone which is projected from another bone and serves as the connection point for the ligaments to connect the collarbone of the shoulder blade.

The clavicle is commonly known as the collar bone to connects the shoulder to the rest of the body via two joints they are acromioclavicular joint and the sternoclavicular joint. The collarbone serves to strut the shoulder blade out from the body where the sternoclavicular joint is at the base of the neck to strut the shoulder blade out from the body. The ligaments, joint capsules and labrum are fixed to stabilize and to reinforce the shoulder. The glenoid cavity is used to increase the contact surface area between ball and socket and also increases the stability of the shoulder joint. The shoulder requires a large number of bursa.

Bursae are filled with fluid and serve to lubricate the points of possible friction between the muscles and the joint capsule. The major bursae in the shoulder include the subacromial bursa, the subdeltoid bursa and the subscapular bursa. The muscles of the shoulder part are “fleshy” components of the body to have an effective movement by pulling the “sinew” which connects the muscles to the bones. Our shoulder and elbow doctors are here to help your bone to get back strong with healthy.