Obturator nerve

Question 1

Obturator nerve anatomy

Answer 1

• L2–L4 give rise to the obturator nerve and converge behind the psoas muscle. The obturator nerve then passes over the pelvic brim in front of the sacroiliac joint and behind the common iliac vessels to enter the thigh via the obturator foramen

Question 2

Obturator nerve injury

Answer 2

• Retroperitoneal surgery
• Excision of endometriosis
• Passage of a trocar through the obturator foramen
• Insertion of transobturator tapes
• During paravaginal defect repairs

Question 3

Obturator nerve injury symptoms

Answer 3

Sensory loss in the upper medial thigh and motor weakness in the hip adductors