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M. obturator internus

Exorotator in the profound dorsal hip musculature
Origin: inner surface of the obturator membrane on the anterior pubic bone
Insertion: trochanteric fossa of the femur
Innervation: nervus musculi obturatorii interni from plexus lumbalis from L2-L4
Antagonists:
Movement: Exorotation, abduction of the thigh in the hip joint