![]() The sciatic nerve is a mixed motor and sensory nerve formed by the L4-S3 nerve roots supplying motor innervation to the posterior thigh muscles and the vast majority of motor and sensory innervation to the lower leg via the tibial and common peroneal nerves 1,2,4. Nerve conduction studies will reveal reduced amplitudes of the superficial peroneal and sural sensory stimulations as well as low tibial and peroneal motor responses but without evidence of conduction block at the knee 2,4. Achilles and hamstring reflexes might be diminished 2.Ĭlinical symptoms will be sometimes less obvious and resemble peroneal nerve neuropathy due to incomplete injury to the nerve 2. ![]() Motor symptoms include foot drop and weakness in knee flexion and hip extension due to affection of the hamstring muscles 1-4. Numbness and weakness often develop more gradually than pain 3. The clinical symptom of sciatic neuropathy is sciatica and includes sharp pain and paraesthesia along the posterior thigh and lower leg including the lateral and plantar aspects of the foot.
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