Iliohypogastric nerve

Obturator nerve

Pudendal nerve

• Motor innervation
  • External urethral sphincter
  • External anal sphincter
  • Levator ani muscles
  • Bulbospongiosus muscle
  • Ischiocavernosus muscle
• Sensory innervation
  • Inferior rectal nerves
    • Skin of the perianal region
    • Lower third of the anal canal
  • Perineal nerves
    • Skin of the perineum
    • Dorsal scrotum (men) or labia majora (women)
  • Dorsal penile (men)/clitoral (women) nerve
    • Dorsum of the penis/clitoris skin
    • Responsible for penile reflex erection
• Pudendal nerve block: injection of a local anesthetic into the pudendal canal to block transmission within the pudendal nerve
  • Most commonly used during childbirth prior to an episiotomy or during surgical procedures involving the perineum
  • The ischial spine is used as a landmark for injection.

Femoral nerve

*Can’t do those ↑