====== Sacral spinal nerve 1 ======

{{ ::s1_nerve.jpg?400|}}

The [[sacral spinal nerve]] 1 ([[S1]]) is a spinal nerve of the sacral segment.

It originates from the spinal column from below the 1st body of the [[sacrum]].



S1 supplies many muscles, either directly or through nerves originating from S1. They are not innervated with S1 as single origin, but partly by S1 and partly by other spinal nerves. The muscles are:

gluteus maximus muscle
gluteus medius muscle
gluteus minimus muscle
tensor fasciae latae
piriformis
obturator internus muscle
inferior gemellus
superior gemellus
quadratus femoris
semitendinosus
gastrocnemius
flexor hallucis longus
abductor digiti minimi
quadratus plantae

===== S1 nerve root block =====
[[S1 nerve root block]]