ANATOMY

Sciatica occurs when there is pressure or damage to the sciatic nerve. This nerve starts in the lower spine and runs down the back of each leg. This nerve controls the muscles of the back of the knee and lower leg and provides sensation to the back of the thigh, part of the lower leg, and the sole of the foot.

Sciatica is generally caused by the compression of lumbar nerves L4 or L5 or sacral nerves S1, S2, or S3, or by compression of the sciatic nerve itself. Symptoms include:

• Pain in the rear or leg that is worse when sitting
• Burning or tingling down the leg
• Weakness, numbness, or difficulty moving the leg or foot
• A constant pain on one side of the rear
• A shooting pain that makes it difficult to stand up