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obturator internus (muscle)

 

Definition: intrapelvic muscle extending into gluteal region; origin, pelvic surface of obturator membrane and margin of obturator foramen; insertion, passes out of pelvis through lesser sciatic foramen, in so doing, making a 90° turn to insert into the medial surface of greater trochanter; action, rotates thigh laterally; nerve supply, nerve to obturator internus (sacral plexus).

Synonym(s): musculus obturator internusTA, internal obturator muscle

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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