Root: S4
Associated nerves:
Posterior femoral cutaneous nerve
Pudendal nerve
Nerve to levator ani
Nerve to coccygeus
Motor innervation:
External anal sphincter
Bulbospongiosus
Ischiocavernosus
External urethral sphincter
Levator ani
Coccygeus (ischiococcygeus)
Sensory innervation:
Posterior surface of thigh
Lower part of buttocks
Penis and clitoris
Anal canal
Perineum