Peroneal Nerve

The common peroneal nerve (Fig. 6) is a branch of the sciatic nerve originating at the superior angle of the popliteal fossa. It leaves the fossa and winds around the head of the fibula, where it is susceptible to injury. Subsequently, it divides into its terminal branches, supplying the anterior muscles of the leg as well as the fibularis muscles. Motor functions of the peroneal nerve include dorsiflexion and plantarflexion of the foot (Fig. 7), whereas sensory innervation is to the lateral and anterior leg and dorsum of foot (Fig. 8).

TABLE 1 ■ Risk Factors for Neuromuscular Complications

Advanced patient age Lean body habitus Muscular build Longer operative time Extreme lithotomy or full flank position

Upper retroperitoneal procedure

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