Obturator internus muscle
Citation, DOI, disclosures and article data
Citation:
b a, Hacking C, Carpenter G, et al. Obturator internus muscle. Reference article, Radiopaedia.org (Accessed on 16 Feb 2025) https://doi.org/10.53347/rID-44263
Permalink:
rID:
44263
Article created:
14 Apr 2016,
a b
Disclosures:
At the time the article was created a b had no recorded disclosures.
View a b's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosures
Revisions:
11 times, by
9 contributors -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- Obturator internus
The obturator internus muscle, like the piriformis muscle, is both a muscle of the pelvic wall and of the gluteal region. It originates within the pelvis, and continues as a flattened tendon posteriorly through the lesser sciatic foramen (between ischial spine and tuberosity).
Summary
-
origin
- anterolateral wall of true pelvis
- deep surface of obturator membrane and pelvic surfaces of pubis and ischium
- insertion: medial side of greater trochanter of femur
-
action
- laterally rotates the extended femur at hip joint
- abducts the flexed femur at hip joint
- arterial supply: inferior gluteal artery
- innervation: nerve to the obturator internus
-
relations:
- posterior: the sciatic nerve and sacrotuberous ligament contact its posterior aspect
- anterior: the nerve to quadratus femoris
Quiz questions
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References
- 1. Gray's Anatomy for Students: With STUDENT CONSULT Online Access, 3e. Churchill Livingstone. ISBN:0702051314. Read it at Google Books - Find it at Amazon
- 2. Clinically Oriented Anatomy. Lippincott Williams & Wilkins. ISBN:1451119453. Read it at Google Books - Find it at Amazon
- 3. Last's Anatomy. Churchill Livingstone. ISBN:0702033944. Read it at Google Books - Find it at Amazon
Incoming Links
Articles:
- Nerve to quadratus femoris and inferior gemellus
- Pudendal canal
- Inferior gemellus muscle
- Obturator foramen
- Superior gluteal artery
- Inferior gluteal artery
- Pubis
- Inferior pubic ramus
- Lesser sciatic foramen contents (mnemonic)
- Obturator hernia
- Lesser sciatic foramen
- Sciatic neuropathy
- Infrapiriform foramen (mnemonic)
- Inferior rectal nerve
- Inferior hypogastric plexus
- Urinary bladder
- Perineal nerve
- Muscles of the lower limb
- Ischioanal fossa
- Obturator fascia
Cases:
Multiple choice questions:
Related articles: Anatomy: Lower limb
- skeleton of the lower limb
- joints of the lower limb
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hip joint
- ligaments
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hip bursae
- anterior
- iliopsoas bursa (iliopectineal bursa)
- lateral
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- greater trochanteric bursa (subgluteus maximus bursa)
- subgluteus medius bursa
- subgluteus minimus bursa
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- ossification centers
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knee joint
- ligaments
- anterior cruciate ligament
- posterior cruciate ligament
- medial collateral ligament
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posterolateral ligamentous complex
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- patellar tendon and quadriceps tendon
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- ossification centers
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ankle joint
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- ligaments
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- ankle bursae
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- regional anatomy
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- subtalar joint
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tarsometatarsal (Lisfranc) joint
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hip joint
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muscles of the lower limb
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- 2nd layer
- 3rd layer
- 4th layer
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accessory muscles of the ankle
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- accessory flexor digitorum longus muscle
- accessory soleus muscle
- peroneocalcaneus internus muscle
- tibiocalcaneus internus muscle
- extensor hallucis capsularis tendon
- anterior fibulocalcaneus muscle
- accessory extensor digiti secundus muscle
- tibioastragalus anticus of Gruber muscle
- vascular supply of the lower limb
- arterial supply of the lower limb
- venous drainage of the lower limb
- innervation of the lower limb
- lymphatic system of the lower limb
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- anteromedial group
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Related articles: Anatomy: Abdominopelvic
- skeleton of the abdomen and pelvis
- muscles of the abdomen and pelvis
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- anterior abdominal wall
- posterior abdominal wall
- abdominal cavity
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- perineum
- abdominal and pelvic viscera
- gastrointestinal tract
- spleen
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endocrine system
-
adrenal gland
- adrenal vessels
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- pancreas
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adrenal gland
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urinary system
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kidney
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variants
- number
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kidney
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female reproductive system
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common iliac artery
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internal iliac artery (mnemonic)
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internal pudendal artery
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abdominal aorta
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sacral plexus
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