Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF Listen ++ For further information, see CMDT Part 24-30: Mononeuropathies + Key Features Download Section PDF Listen +++ ++ Misplaced deep intramuscular injections are probably the most common cause Trauma to the buttock, hip, or thigh may also be responsible The resulting clinical deficit depends on whether the whole nerve or only certain fibers have been affected In general, the peroneal (fibular) fibers of the sciatic nerve are more susceptible to damage than those destined for the tibial nerve The common peroneal (fibular) nerve itself may be compressed or injured in the region of the head and neck of the fibula (eg, by sitting with crossed legs or wearing high boots) + Clinical Findings Download Section PDF Listen +++ ++ Weakness of dorsiflexion and eversion of the foot Numbness or blunted sensation of the anterolateral aspect of the calf and dorsum of the foot + Diagnosis Download Section PDF Listen +++ ++ Suggested clinically Confirmed by electromyography A sciatic nerve lesion may be difficult to distinguish from peroneal neuropathy unless there is electromyographic evidence of involvement of the short head of the biceps femoris muscle + Treatment Download Section PDF Listen +++ ++ Unless trauma has interrupted the continuity of the nerve, treatment is supportive Avoid pressure on the nerve