LKnative - Obturator nerve block

3 – Anatomy: Axial view of the anterior and posterior branches of the obturator nerve

The anterior branch of the obturator nerve descends in the fascial plane between the adductor longus and brevis muscles

The posterior branch of the obturator nerve pierces the external obturator muscle and descends in the fascial plane between the adductor brevis muscle and the adductor magnus muscle

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Green arrow = anterior branch of the obturator nerve; blue arrow = posterior branch of the obturator nerve; yellow star = adductor brevis muscle; red star = adductor longus muscle; blue star = pectineus muscle