What is Sciatica?

Sciatica is a condition in which the sciatic nerve is compressed or irritated in some way, resulting in a sharp pain deep in the buttock that sometimes radiates down the back of the thigh and leg, all the way down to the foot.

The sciatic nerve originates as nerve roots exiting both sides of the lumbar spine and sacrum, named L4, L5, S1, S2, S3, S4 and S5 which converge into the sciatic nerve.    The sciatic nerve is the largest nerve in the body and controls motor and sensory function in the legs.

Although most cases of sciatica are unilateral (affecting one leg only), it is quite possible to have bilateral (both legs) sciatica.


NEXT:  Causes of Sciatica

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