Figure 14. Normal anatomy of the distal DPN branches. Coronal oblique spin-echo T1-weighted MR image (400/12) shows the medial branch of the DPN (for the first dorsal space) (thick arrow) under the extensor hallucis longus tendon (arrowhead) and the lateral branch of the DPN (thin arrow), which supplies motor innervation to the extensor digitorum brevis muscle (EDB). N = navicular bone.