Sciatica is a name describing any form of nerve pain that occurs when the sciatic nerve is compressed or damaged. There are two branches of the sciatic nerve in the hip area, each about as wide as a thumb. They originate at the base of the spine, thread through the pelvis and buttocks, and down the hip. At a point above the knee, the sciatic nerve divides into branches that make the muscles move (motor) and supply sensation to the calves, soles, and outer edges of feet. These are the largest nerves in the body.

Sciatica most commonly occurs when a branch of the sciatic nerve is compressed at the base of the spine, where the nerve leaves the spinal canal. When a sciatic nerve is stretched or pinched, usually by a herniated disk, sciatica is the result.

Neuropathy - sciatic nerve and Sciatic nerve dysfunction

there are two alternative Names of sciatica.The sciatic nerve supplies information about movements to the leg, and sends information about sensations back to the brain. The sciatic nerve is quitelarge, in fact, it is the largest peripheral nerve in the body. The sciatic nerve is formed from the lower segments of the spinal cord; it is made up from the lumbar and sacral nerve roots from the spine. The sciatic nerve exits the lower part of the spinal cord (lumbosacral region), passes behind the hip joint, and runs down the back of the thigh.

Sciatica usually occurs on only one side of the body. Prolonged sitting or standing, sneezing, coughing or lifting aggravates sciatica. Sciatic pain may be acute but often develops gradually.

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