Figure 5: Superior displacement of the affected scapula is represented as a ratio of A to B. Y represents a line drawn from the center of the glenoid of the abnormal scapula, Z represents a line drawn from the center of the glenoid of the right scapula, both Y and Z are perpendicular to the vertebral axis, and X is the vertical body axis; A is the distance between the points at which the lines intersect the spinal column; B is the vertical height of the normal scapula