解剖 A, Dorsal view illustrating Lister's tubercle. B, Palmar view showing the scaphoid and lunate fossae distally, as well as the sigmoid notch ulnarly. Vascular foramina can be noted on the palmar and dorsal aspects of the distal radius. C, An end-on view of the distal radius and radioulnar joint showing the scaphoid fossa, lunate fossa, and ulnar head resting in the sigmoid notch. D, A view of the sigmoid notch from the ulnar aspect.
生物力学 The anteroposterior radiograph on the left illustrates normal radial inclination of approximately 22 degrees. The lateral radiograph on the right illustrates normal volar tilt of the distal articular surface of approximately 11 degrees.