Online. Marker Sets Page Published on Thursday, October 9, 1997 by Gideon Ariel Marker Sets Segment Motion relative to Name Description Head Trunk Forehead Left Temple Right Temple Trunk World Sternal Notch Xiphoid Process Spinous Process of C7 Upper Arm Trunk Acromion Process Lateral Epicondyle of Elbow Medial Epicondyle of Elbow Lower Arm Upper Arm Radial Styloid Process Ulnar Styloid Process Hand Lower Arm Lateral Aspect of 2nd MCP Joint Medial Aspect of 5th MCP Joint Reference: /wizard/vision/markersets.asp