The sciatic nerve is the largest nerve in the human body and is derived from the sacral plexus. It originates from the anterior rami of the lower lumbar (L4-L5) and upper sacral spinal nerves (S1, S2, S3). It contains fibers from both the posterior and anterior divisions of these spinal nerves. The sciatic nerve arises in the lumbosacral region. It descends through the posterior aspect of the thigh. Before entering the popliteal fossa, the nerve terminates by splitting into two lres from both th