The glenohumeral joint is the articulation between the spherical head of the humerus and the concave glenoid fossa of the scapula. Being a synovial joint, both articular surfaces are covered with hyaline cartilage.

Activities of the arm rely on movement from not only the glenohumeral joint but also the scapulothoracic joint (acromioclavicular, sternoclavicular and scapulothoracic articulations). Together these joints can change the position of the glenoid fossa, relative to the chest wall. Thus repositioning the glenohumeral joint, and upper limb, within space. This provides for a greater range of motion available within the greater shoulder complex;

Articulatio Humeri