One of six small hip muscles in the lateral rotator group
Internal obturator muscle
The obturator internus and nearby muscles (posterior view)
Coronal section of anterior part of pelvis, through the pubic arch. Seen from in front. (Obturator internus labeled at right.)
Details
Origin
Ischiopubic ramus and obturator membrane
Insertion
Medial aspect of the greater trochanter
Artery
Inferior gluteal artery
Nerve
Nerve to obturator internus (L5, S1, S2)
Actions
Abducts and laterally rotates the extended hip and abducts the flexed thigh at the hip, and stabilizes the hip during walking
Identifiers
Latin
musculus obturatorius internus
TA98
A04.7.02.012
TA2
2605
FMA
22298
Anatomical terms of muscle
[edit on Wikidata]
The internal obturator muscle or obturator internus muscle originates on the medial surface of the obturator membrane, the ischium near the membrane, and the rim of the pubis.
It exits the pelvic cavity through the lesser sciatic foramen.
The internal obturator is situated partly within the lesser pelvis, and partly at the back of the hip-joint.
It functions to help laterally rotate femur with hip extension and abduct femur with hip flexion, as well as to steady the femoral head in the acetabulum.
and 28 Related for: Obturator internus muscle information
The obturator sign, also called Cope's obturator test, is an indicator of irritation to the obturatorinternusmuscle. The technique for detecting the...
gemellus, inferior gemellus, and obturatorinternusmuscles prior to insertion).[citation needed] The piriformis muscle is innervated by the piriformis...
the gemellus superior muscle, then re-enters the pelvis to innervate the obturatorinternusmuscle. The nerve to obturatorinternus is a branch of the lumbosacral...
piriformis, gemellus superior, obturatorinternus, gemellus inferior, quadratus femoris and the obturator externus. All muscles in the lateral rotator group...
between the obturator foramina. Rarely, the obturator foramen may be doubled on one side. ObturatorinternusmuscleObturator externus muscle The two circles...
canal) is an anatomical structure formed by the obturator fascia (fascia of the obturatorinternusmuscle) lining the lateral wall of the ischioanal fossa...
into: (a) the fascial sheaths of the obturatorinternusmuscle (fascia of the obturatorinternus) the piriformis muscle (fascia of the piriformis) the pelvic...
the obturatorinternus tendon. The obturator externus muscle arises from the margin of bone immediately around the medial side of the obturator foramen...
to govern the toes. The muscles are: sphincter urethrae membranaceae gluteus maximus muscle piriformis obturatorinternusmuscle superior gemellus semitendinosus...
the lateral pelvic wall by its attachment to the obturator fascia of the obturatorinternusmuscle. It attaches to the uterosacral ligament. It is continuous...
through S4, travels through the pudendal canal on the fascia of the obturatorinternusmuscle, and gives off the perineal nerve in the perineum. The major branch...
transition area between the head and neck is quite rough due to attachment of muscles and the hip joint capsule. Here the two trochanters, greater and lesser...
the surface of the perineum and its apex at the line of meeting of the obturator and anal fasciae. It has the following boundaries: The contents include:...
not responsible for the innervation of the obturatorinternus, despite the similarity in name. An obturator nerve block may be used during knee surgery...
This is a table of skeletal muscles of the human anatomy, with muscle counts and other information. Skeletal muscle maps Anterior view Posterior view...
of the tendon of the obturator externus, and above and in front of this an impression for the insertion of the obturatorinternus and superior and inferior...
ilium. Together these muscles are commonly referred to as the "iliopsoas". This group consists of the externus and internusobturators, the piriformis, the...
superior and inferior gemelli muscles and the obturatorinternusmuscle. It enters the anterior surfaces of quadratus femoris muscle[verification needed] and...
superior gemelli muscles represent marginal heads of the obturatorinternus and assist this muscle. These three muscles form a three-headed muscle (tricipital)...
the pelvis, it gives branches to the iliacus, piriformis, and obturatorinternusmuscles. Just prior to exiting the pelvic cavity, it also gives off a...
the inferior border of the obturator foramen and serves as part of the origin for the obturatorinternus and externus muscles. Also, most adductors originate...
inferior and Superior gemelli muscles assist the obturatorinternus and the three muscles together form the three-headed muscle known as the triceps coxae...
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