26+ Applied Anatomy Of Sciatic Nerve. The sciatic nerve, also called the ischiadic nerve, is a large nerve in humans and other vertebrate animals which is the largest branch of the sacral plexus and runs alongside the hip joint and down the lower limb. The sciatic nerve is the widest nerve of the body, consists of two components namely tibial and common peroneal components, derived from the lumbosacral plexus from the ventral rami of l4 to s3 spinal nerves.
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These usually occur along the thigh up. The neurons are bundled together into groups called fascicles, which. Sciatic nerve irritation causes pain that radiates down the leg from the low back or buttocks. The mixed (sensory and motor) sciatic nerve provides the majority of the functions in the lower limbs and makes a healthy sciatic nerve is well protected near its origin by the buttock muscles and cannot be palpated (felt by touching or pressing on the skin).