Yesterday I taught for a few hours at Black Dog's Teacher Training. It was my first time alone with the students and I found them engaged and lovely. I was instructing them on the Shoulder, which is one of my most favorite subjects. I used to call it the "Shoulder Joint" but now I am trying to call it the "Shoulder Complex." The Shoulder Complex is actually made up of 3 joints. The primary joint is the "glenohumeral joint" which is where the humerus connects to the glenoid fossa, a part of the scapula that creates the socket. There are also two secondary joints: the acrimioclavicular joint, which is where the clavicle joins with the acromion process (another part of the scapula). And the sternoclavicular joint, which is where the clavicle connects to the sternum. This last joint- interestingly enough- is the only place where the shoulder connects to the spine (via sternum to ribs, to thoracic spine). The Shoulder Complex is incredibly complex! It is one of the most movable parts of the body, prone to dislocation and injury. It is made up of the clavicle, humerus and scapula, plus myriad of muscles, tendons and ligaments.