The sciatic nerve is the longest and largest body, and measured three-quarters of an inch in diameter. The sciatic nerve originates in the sacral plexus: a network of nerves in the lower part of the back (spine lumbosacral). Lumbosacral spine is the combination of the lumbar and sacral region. The sciatic nerve and nerve branches allow movement and sensations (sensory and motor functions) in the thigh, knee, calf, ankle, feet and fingers. Below is an illustration of the sciatic nerve, and lumbosacral spine. Symptoms of sciatica sciatic nerve is injured or inflamed, causes symptoms called sciatica.
This can cause severe pain in any part of the path of the sciatic nerve, from the buttocks to the toes. If the nerve suffers a compression caused by conditions such as a herniated disc or a bulging disc, symptoms may include loss of reflexes, weakness and numbness besides severe pain. The sciatic nerve pain can hinder activities like walking, sitting and standing. How can spread the pain of sciatica sciatic nerve exits the pelvic area through a nervous passenger called sciatic foramen. In the upper part of the sciatic nerve are formed two branches: her articulate and the muscle. The branch articulate caters to the hip joint.
The muscular branch serves the posterior muscles of the leg; the muscles that allow movement. The sciatic nerve also allows the movement and sensations in the thigh, knee, calf, ankle, feet, and fingers. There are other complex nervous structures that are involved: the peroneal nerve and tibial. The first originate in the lumbar vertebrae L4-L5 nerve roots and the first and second levels of the sacrum (S1-S2). Out of the pelvis, the peroneal nerves down by front and side leg and the outside of the knee to the foot. Tibial nerves originate from the nerve roots in the L4-L5 and S1-S3. Tibial nerve they pass by the knee and down to the foot.