Right or Left Bones? Clavicle Ulna . Together, the clavicles make a . Lay the ulna on the table. “handlebar” shape (low at the middle . Can you see the radial notch? of the chest, higher near the shoulders). o If yes, the open side of the . The blunt tip (sternal end) touches the trochlear (semilunar) notch tells sternum at the middle of the chest. you the bone orientation (see . The round tip (acromial end) touches the photo 1). scapula at the shoulder. o If no, the open side of the . The bumpy side of the clavicle faces the trochlear (semilunar) notch is the rib cage. opposite of the bone orientation . The smooth side of the clavicle faces (see photo 2). outward

Radius Fibula . The styloid process always touches the . The smoother tip (head of the fibula) thumb. touches the knee. . If the lower end of the radius (near the . The rougher tip (lateral malleolus) styloid process) is rough, you are touches the ankle. looking at the back of the wrist. . The point of the lateral malleolus points . If the lower end of the radius is smooth, to the pinkie toe, not the middle of the you are looking at the inside of the wrist. foot. . The front of the fibula (anterior view) has an edge. . The back of the fibula (posterior view) is flat.

References: University of Liverpool Faculty of Health and Life Sciences. (2013). Radius and ulna (right forearm) [Digital photograph]. Retrieved from https://www.flickr.com/photos/liverpoolhls/10819145494.