- Male reproductive system
- Lymphatic system
- Skeletal system
- Head muscles
- Neck muscles
- Muscles of upper limb
- Thoracic muscles
- Muscles of back
- Muscles of lower limb
- Blood vessels
- Respiratory system
- Digestive system
- Endocrine glands
- Nervous system
- Female reproductive system
The obturator externus (Latin: musculus obturatorius externus) is a triangular-shaped muscle that is located deep within the pelvis. It stretches between the hip bone and femur. The obturator externus provides lateral (external) rotation of the thigh. Therefore, it is classified as the lateral rotator.
|Origin||External surface of obturator membrane, boundaries of obturator foramen|
|Action||Thigh external rotation, stabilization of hip joint|
|Innervation||Obturator nerve (L2 - L4)|
|Blood supply||Obturator and medial circumflex femoral arteries|
The obturator externus muscle originates from the external surface of the obturator membrane and the boundaries of the obturator foramen.
The obturator externus inserts on the trochanteric fossa of the femur.
The obturator externus muscle provides external (lateral) rotation of the thigh at the hip joint. Also, it stabilizes the hip joint.
The obturator externus muscle receives arterial blood supply from the medial circumflex femoral and obturator arteries. The first artery is a branch of the deep femoral artery, while the latter arises from the internal iliac artery.