Dr. Mark Wichman, a board-certified orthopedic surgeon, has practiced in the city of Milwaukee for more than 20 years. Part of Aurora Advanced Orthopaedics since 2009, Dr. Mark Wichman focuses on minimally invasive procedures for the knee and shoulder.
The shoulder joint is one of the largest and most mobile in the human body. It is formed at the point at which the humerus of the upper arm rests like a ball inside the socket of the shoulder blade, or scapula. A part of the larger shoulder joint, the structure created by the scapula and humerus is known as the glenohumeral joint.
The shoulder region also contains the coracoid process and acromion, both of which are bony projections of the shoulder blade. The acromion comes into contact with the clavicle, or collarbone, at the acromioclavicular joint. Meanwhile, the clavical contacts the sternum at the sternoclavicular joint, which facilitates movement of the collarbone.
Each of these joints also features a network of muscles, tissue, and cartilage. The rotator cuff surrounds the full shoulder to offer support and range of motion. A fluid sac known as the bursa protects the rotator cuff, and the cartilage of the labrum cushions the humerus as it moves in the shoulder joint.