Definition
The longest and thickest nerve in the body, running from the lower spine through the buttock and down each leg. Compression or irritation of this nerve causes sciatica -- pain radiating from the back down the leg.
Sciatic Nerve
anatomyThe sciatic nerve is the longest and thickest nerve in the body. It forms from nerve roots in the lower back, passes through the buttock and runs down the back of each thigh before dividing to supply the lower leg and foot. When it is compressed or irritated, pain can shoot from the lower back down the leg, a pattern known as sciatica.
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