Sciatica is the most common name for radiculopathy or a painful sciatica nerve.
The sciatic nerve is when the L4-S3 Spinal Nerves connect together to form one large nerve about the size on your thumb! This bundled nerve exits the pelvis through the greater sciatic notch, crosses over the piriformis and runs down the back of the leg.
Scaitica means the collective nerve bundle creating the sciatic nerve is experiencing pain. This can occur in the as the nerve exits the lumbar spine, in the pelvis, as it cross the piriformis on anywhere down the back of the leg.
What does the Sciatic Nerve Do?
The sciatic nerve supplies the muscles of the lower leg in the calf, ankle and muscles behind the knee. In the foot the sciatic nerve is responsible for touch sensation to the back of leg, calf, ankle and the bottom of the foot.