NCIt definition : The long nerve that is formed by the merging of the ventral rami of the L4, L5, and
S1 in the pelvis and passes down the lower limb where it divides into the common peroneal
and tibial nerves.;
Alternative definition : CDISC: A nerve arising from the merge of the lumbar and sacral rami in the pelvis
and dividing into the common peroneal and tibial nerves, and which innervates the
muscles of the thigh.; UBERON: A large nerve that supplies nearly the whole of the skin of the leg, the muscles
of the back of the thigh, and those of the leg and foot. It begins in the lower back
and runs through the buttock and down the lower limb.;