The sacral spinal nerve 2 (S2) is a

spinal nerve A spinal nerve is a mixed nerve, which carries Motor neuron, motor, Sensory neuron, sensory, and Autonomic nervous system, autonomic signals between the spinal cord and the body. In the human body there are 31 pairs of spinal nerves, one on each s ...

of the sacral segment.American Medical Association
Nervous System -- Groups of Nerves It originates from the

spinal column The spinal column, also known as the vertebral column, spine or backbone, is the core part of the axial skeleton in vertebrates. The vertebral column is the defining and eponymous characteristic of the vertebrate. The spinal column is a segmen ...

from below the 2nd body of the

sacrum The sacrum (: sacra or sacrums), in human anatomy, is a triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1S5) between ages 18 and 30. The sacrum situates at the upper, back part of the pelvic cavity, ...

Muscles

S2 supplies many muscles, either directly or through nerves originating from S2. They are not innervated with S2 as single origin, but partly by S2 and partly by other spinal nerves. They are most commonly known to govern the toes. The muscles are: * sphincter urethrae membranaceae * gluteus maximus muscle * piriformis * obturator internus muscle * superior gemellus * semitendinosus * gastrocnemius *

flexor hallucis longus The flexor hallucis longus muscle (FHL) attaches to the plantar surface of phalanx of the great toe and is responsible for flexing that toe. The FHL is one of the three deep muscles of the posterior compartment of the leg, the others being the ...

* abductor digiti minimi * quadratus plantae

Additional images

File:Slide9y.JPG, Sacral spinal nerve 2 File:Slide19y.JPG, Sacral spinal nerve 2 File:Slide6z.JPG, Sacral spinal nerve 2

References

Spinal nerves {{neuroanatomy-stub