Name

# Obturator Externus

Pronunciation

(OB-tu-ra-tur ex-TER-nus)

Origin/Proximal Attachment

Medial surface of obturator foramen; external surface of obturator membrane

Insertion/Distal Attachment

Trochanteric fossa of femur

Action/Relevance

Externally rotate the thighAssists to flex hip

Innervation

Nerve to obturator externus (L3, 4)

Notes

Flat triangular muscle covering the external surface of the anterior aspect of the pelvis

Crosses the back of the femoral neck