Root: S2
Associated nerves:
Nerve to obturator internus
Inferior gluteal nerve
Sciatic nerve
Posterior femoral cutaneous nerve
Piriformis nerve
Perforating cutaneous nerve
Pudendal nerve
Motor innervation:
Obturator internus
Superior gemellus
Gluteus maximus
Biceps femoris, long head
Biceps femoris, short head
Semimembranosus
Semitendinosus
Gastrocnemius
Soleus
Popliteus
Flexor digitorum longus
Flexor hallucis longus
Tibialis posterior
Flexor digitorum brevis
Adductor hallucis
Flexor hallucis brevis
Lumbrical I (foot)
Lumbricals II-IV (foot)
Adductor digiti quinti
Abductor digiti quinti
Quadratus plantae
Flexor digiti minimi brevis
Interossei dorsales
Interossei plantares
Piriformis
External anal sphincter
Bulbospongiosus
Ischiocavernosus
External urethral sphincter
Sensory innervation:
Posterior surface of thigh
Lower part of buttocks
Superior, lateral part of leg
Posterior, lateral part of leg and lateral edge of foot.
Lateral part of sole of foot and toes 4-5
Heel and posterior sole of foot.
Lower medial part of buttock
Penis and clitoris
Anal canal
Perineum