where does the peroneal nerve originate
1 The peroneal nerves originate from the nerve roots at the fourth and fifth lumbar spine (L4-L5) and first and second levels of the sacrum (S1-2). 2  After the peroneal nerves leave the pelvis, they travel down the front and side of the leg, and along the outer side of the knee, to the foot. Other complex nerve structures are involvedâthe peroneal nerves and tibial nerves. 2  The peroneal nerves originate from the nerve roots at the fourth and fifth lumbar spine (L4-L5) and first and second levels of the sacrum (S1-2).