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and a main belly. The supernumerary muscle described above originates from the superior fascicle, while an anomalous fascicle — also derived from the external obturator — originates from the main belly. The "original" external obturator, i.e. without these supernumerary muscular parts,
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The external obturator muscle acts as a lateral rotator of the hip joint. As a short muscle around the hip joint, it stabilizes the hip joint as a postural muscle. It also helps to abduct the hip joint when in flexion.
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The fibers converge and pass posterolateral and upward, and end in a tendon which runs across the back of the neck of the femur and lower part of the capsule of the hip joint and is inserted into the
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The fibers springing from the pubic arch extend on to the inner surface of the bone, where they obtain a narrow origin between the margin of the foramen and the attachment of the obturator membrane.
454:. While this muscle, when present, is similar to its neighbouring adductors, it is formed by separation from the superficial layer of the external obturator, and is thus not
814:"A morphological study on the human obturator externus muscle with reference to anomalous muscle and anomalous fasciculus originating from the obturator externus muscle"
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from where it runs downwards and laterally. In half of cases, it inserts into the anterior surface of the insertion
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of the adductor minimus. In the remaining cases, it is either inserted into the upper part of the
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actually occurs in only 20% of cases, and apparently the external obturator readily undergoes
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Muscles of the back of thigh, with insertion of obturator externus muscle labeled in purple
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It is also considered to be part of the short external rotators of the hip, along with the
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Knowledge articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
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The obturator vessels lie between the muscle and the obturator membrane; the
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It arises from the margin of bone immediately around the medial side of the
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773:"A supernumerary muscle between the adductors brevis and minimus in humans"
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Sauerland, Eberhardt K.; Patrick W. Tank; Tank, Patrick W. (2005).
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693:. Hagerstown, MD: Lippincott Williams & Wilkins. p. 129.
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at The
Anatomy Lesson by Wesley Norman (Georgetown University) (
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Nakamura, E; Masumi, S; Miura, M; Kato, S; Miyauchi, R (1992).
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The obturator externus and nearby hip muscles (posterior view)
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Yatsunami, M; Tai, T; Irie, Y; Ogawa, K; Miyauchi, R (2004).
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reaches the thigh by passing in front of the muscle, and the
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892:—Plastination Laboratory at the Medical University of Vienna
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Obturator externus muscle. Deep dissection. Anterior view.
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Structures surrounding right hip-joint (viewed from below)
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One of six small hip muscles in the lateral rotator group
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that the obturator externus is divided into a superior
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462:. This muscle originates from the upper part of the
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741:"Anatomy, Abdomen and Pelvis, Obturator Muscles"
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747:, Treasure Island (FL): StatPearls Publishing,
481:It has been demonstrated by the course of the
118:The obturator externus. Anterior-Inferior view
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890:Cross section image: pelvis/pelvis-e12-15
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591:Deep muscles of the medial femoral region
80:Learn how and when to remove this message
43:This article includes a list of general
739:Larson, Maddy R.; Ryan, Weston (2024),
365:, and sometimes considered part of the
361:It is sometimes considered part of the
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662:This article incorporates text in the
428:anterior branch of the obturator nerve
1308:Lateral intermuscular septum of thigh
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396:and surrounding bone, viz., from the
1313:Medial intermuscular septum of thigh
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483:posterior branch of obturator nerve
179:Posterior branch of obturator nerve
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49:it lacks sufficient corresponding
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818:Okajimas Folia Anatomica Japonica
777:Okajimas Folia Anatomica Japonica
627:Muscles of thigh. Anterior views.
1788:Deep lateral rotators of the hip
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567:Right hip bone. External surface
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223:musculus obturatorius externus
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474:or the posterior part of the
1495:Fibularis (peroneus) muscles
1375:Fibularis (peroneus) tertius
446:muscle is found between the
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1798:Medial compartment of thigh
1669:Flexor digiti minimi brevis
863:"Obturator externus muscle"
670:of the 20th edition of
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460:adductor muscles of the hip
363:medial compartment of thigh
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852:A>K datta-inf extremity
790:10.2535/ofaj1936.69.2-3_89
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615:Obturator externus muscle
266:Anatomical terms of muscle
1803:Muscles of the lower limb
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1599:Extensor digitorum brevis
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639:Obturator externus groove
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284:external obturator muscle
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1594:Extensor hallucis brevis
1365:Extensor hallucis longus
1625:Flexor digitorum brevis
1461:Flexor digitorum longus
715:"Summary of Lower Limb"
400:, and the ramus of the
64:more precise citations.
1659:Flexor hallucis brevis
1630:Abductor digiti minimi
1456:Flexor hallucis longus
646:anatomical terminology
1036:Lateral rotator group
1793:Hip lateral rotators
1024:Tensor fasciae latae
464:inferior pubic ramus
442:In 33% of people, a
398:inferior pubic ramus
1541:Intermuscular septa
831:10.2535/ofaj.80.103
1686:Plantar interossei
1466:Tibialis posterior
1198:External obturator
1128:Vastus intermedius
1067:External obturator
1062:Internal obturator
944:Muscles of the hip
644:This article uses
517:. You can help by
416:trochanteric fossa
406:obturator membrane
394:obturator membrane
181:(third and fourth
151:Trochanteric fossa
139:obturator membrane
18:Obturator externus
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691:Grant's dissector
542:Additional images
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382:quadratus femoris
374:gemellus superior
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135:Obturator foramen
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1264:Femoral ring
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1091:compartments
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956:Iliac region
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235:A04.7.02.031
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70:October 2011
67:
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1783:Hip muscles
1710:retinacula
1395:Superficial
1291:Fascia lata
973:Psoas minor
969:Psoas major
492:ontogenetic
468:aponeurosis
212:Identifiers
62:introducing
1772:Categories
1561:Transverse
1113:Quadriceps
1072:Piriformis
872:2021-01-22
758:2024-05-07
745:StatPearls
725:2008-01-27
652:References
378:piriformis
45:references
1676:4th layer
1654:3rd layer
1637:2nd layer
1615:1st layer
1556:Posterior
1473:Popliteus
1431:Plantaris
1385:Posterior
1193:Pectineus
1158:Hamstring
1150:Posterior
1108:Sartorius
964:Iliopsoas
948:human leg
908:PTCentral
438:Variation
422:Relations
388:Structure
369:region.
146:Insertion
1714:Peroneal
1551:Anterior
1352:Anterior
1208:Adductor
1203:Gracilis
1100:Anterior
990:Buttocks
896:lljoints
840:15134328
753:36943954
668:page 477
633:See also
498:Function
1762:Anatomy
1608:Plantar
1487:Lateral
1228:Minimus
1017:Minimus
1007:Maximus
978:Iliacus
799:1436954
452:minimus
402:ischium
367:gluteal
191:Actions
124:Details
58:improve
1748:Portal
1729:Flexor
1698:Fascia
1587:Dorsal
1517:Fascia
1505:Brevis
1500:Longus
1414:Soleus
1240:Fascia
1223:Magnus
1218:Brevis
1213:Longus
1185:Medial
1012:Medius
867:Kenhub
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356:pelvis
196:Abduct
162:Artery
130:Origin
47:, but
1086:Thigh
666:from
270:[
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218:Latin
206:thigh
199:thigh
174:Nerve
155:femur
1579:Foot
1442:Deep
946:and
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795:PMID
749:PMID
695:ISBN
450:and
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282:The
247:2636
230:TA98
137:and
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