Scapulohumeral Rhythm

Scapulohumeral Rhythm is an interaction between the scapula and the humerus . It is very important for full range of motion in the shoulder. The joints involved are the scapulothoracic joint and the glenohumeral joint. Both of these joints have to work together in order to successfully reach 180 degrees of shoulder extension, for example. They both have to do their roles and their roles are: Glenohumeral (GH) joint is 120 degrees of the 180 degrees of shoulder extension. Scapulothoracic (ST) joint is 60 degrees of the 180 degrees of shoulder extension ...