Figure 16. Normal ulnar nerve. Photograph (right) shows the area scanned. A 60-year-old man volunteered to undergo a US examination during a routine physical health check-up. Transverse US scan of his right dorsal medial arm at a level 5 cm above the medial epicondyle shows a round-to-ovoid hypoechoic ulnar nerve with a reticular pattern (arrows). T = medial head of triceps muscle, B = biceps muscle.