What is the sciatic nerve?
(Sciatica is a condition involving pain, weakness, numbness, or
tingling in the leg. It is caused by an injury to or compression of
the sciatic nerve which branches down your back.The sciatic nerve
is commonly injured by fractures of the pelvis, gunshot wounds, or
other trauma to the buttocks or thigh. Prolonged sitting or lying
with pressure on the buttocks may also injure it. )
The sciatic nerve is the longest nerve in your body; it runs
from your lower back, through your buttock, down your leg.
The tibial and fibular nerves originate from spinal segments
L4-S3. The two nerves come together and are referred to jointly as
the sciatic (meaning hip) nerve. The sciatic nerve is
the largest peripheral nerve in the body.They separate at the back
of the knee. The tibial nerve supplies the posterior compartment of
the leg and the fibular supplies the anterior and lateral
The sciatic nerve are nerve roots coming out of the spinal cord and
into the lower back.