The obturator externus is a muscle of the medial compartment of the thigh. It is one of the smaller muscles of the medial thigh and it is located superiorly within the compartment. Attachments: Originates from the membrane of the obturator foramen and adjacent bone. It passes under the neck of femur and attaches onto the posterior aspect of the greater trochanter. Actions: Adduction and lateral rotation of the thigh. Innervation: Obturator nerve (L2-L4). Blood Supply: Obturator artery and medial circumflex femoral artery. By TeachMeSeries Ltd (2025) Fig 1Muscles of the medial thigh. The overlying muscles in the anterior compartment have been removed. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article