Root: S3
Associated nerves:
Sciatic nerve
Posterior femoral cutaneous nerve
Perforating cutaneous nerve
Pudendal nerve
Motor innervation:
Biceps femoris, long head
External anal sphincter
Bulbospongiosus
Ischiocavernosus
External urethral sphincter
Levator ani
Sensory innervation:
Posterior surface of thigh
Lower part of buttocks
Lower medial part of buttock
Penis and clitoris
Anal canal
Perineum