Pectoral/Shoulder Girdle Joints
1.Clavicle moves with respect to sternum, scapula with respect to clavicle and humerus with respect to scapula.
2.Two joints of the pectoral girdle: Sternoclavicular and Acromioclavicular
3.Movements of pectoral girdle increase ROM of shoulder joint, by changing relative position of theglenoid fossa with respect to the chest wall
4.Lateral movement of scapula around chest wall puts it in sagittal plane with glenoid fossa facing more forward. Medial movement of shoulder blade towards vertebral column puts scapula more in frontal plane; glenoid fossa faces more laterally
5.In shoulder elevation glenoid fossa faces more upwards and in depression, more downwards