Figure 44-18 A, Anatomic landmarks for a block of the posterior tibial and sural nerves at the ankle (see Plate 14A in the color atlas of this volume). B, Posterior tibial nerve and method of needle placement for a block at the ankle (see Plate 14B in the color atlas of this volume). C, Sural nerve and method of needle placement for a block at the ankle (see Plate 14C in the color atlas of this volume).