Fig. 15

Sonoanatomy of the superficial peroenal (fibular) nerve. Short-axis views of the superficial fibular nerve from its origin from the fibular nerve to the ankle. A Terminal division of the common peroneal nerve into deep and superficial peroneal nerves. The anterior branch is the deep peroneal nerve and the posterior branch is the superficial peroneal nerve. B The superficial peroneal nerve distal to the fibular tunnel at the proximal third of the leg coursing deep to the peroneus longus muscle. C The superficial peroneal nerve at the mid-leg running between the peroneus longus and extensor digitorum longus under the deep crural fascia. D The superficial peroneal nerve at the distal leg running in the subcutaneous tissue after it traverses the deep crural fascia. The nerve splits into two terminal branches