External obturator muscle
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The external obturator muscle or obturator externus muscle is a flat, triangular muscle, which covers the outer surface of the anterior wall of the pelvis.
Obturator externus muscle. Deep dissection. Anterior view.
Obturator externus muscle
Muscles of thigh. Anterior views.
Piriformis muscle
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The piriformis muscle is a flat, pyramidally-shaped muscle in the gluteal region of the lower limbs. It is one of the six muscles in the lateral rotator group.
External obturator muscle
…part of the gluteal region. It is also considered to be part of the short external rotators of the hip, along with the gemellus superior and inferior, piriformis, and quadratus femoris. It arises from the margin of bone immediately around the medial side of the obturator membrane and surrounding bone, viz., from…
Buttocks seen from behind (the piriformis and the rest of the lateral rotator group are visible)