Pubis
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At the time the article was created Nafisa Shakir Batta had no recorded disclosures.
View Nafisa Shakir Batta's current disclosuresAt the time the article was last revised Jeremy Jones had no financial relationships to ineligible companies to disclose.
View Jeremy Jones's current disclosures- Pubic bone
- Pubic bones
- Pubis bone
The pubis, together with the ilium and ischium, make up the innominate bone of the pelvis. These are individual bones in the young and unite to form one bone in adults, the principal union forming the fused acetabulum.
The pubis is the ventral part of the innominate bone and forms a median cartilaginous symphysis (pubic symphysis).
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Gross anatomy
Osteology
The pubic bone has an anteromedial body, a superior ramus passing upwards to the acetabulum and an inferior ramus bordering the obturator foramen which joins the ischial ramus (conjoined ramus or the ischiopubic ramus).
The body of pubis is flattened and has an anterior, posterior, and symphyseal surface.
The superior pubic ramus is triangular in cross-section and has an anterior pectineal surface, a dorsosuperior pelvic surface and a downsloping obturator surface. The pectineal surface extends from iliopubic or iliopectineal eminence to the pubic tubercle bounded by the obturator crest in front and pecten pubis behind. The obturator surface exhibits an obturator groove along which the obturator vessels and nerves pass from the pelvis to the thigh. The pecten pubis is the sharp superior edge of the pectineal surface of the superior ramus of the pubis.
The inferior pubic ramus has two surfaces, the anteroexternal surface facing the thigh and the posterointernal surface facing the perineum.
The pubic tubercle is the crest of bone forming the medial attachment of the inguinal ligament and is crossed by the spermatic cord.
Articulations
The symphyseal surface is elongate and oval, united by cartilage to its fellow at the pubic symphysis.
Attachments
Musculotendinous
Muscles that originate from pubis:
gracilis muscle and adductor brevis muscle at the external surface of the body of pubis and its inferior ramus
obturator externus muscle at external surface of superior and inferior rami
obturator internus muscle at pelvic surface of superior and inferior rami
adductor longus muscle at upper body of pubis just below the pubic crest
pectineus muscle from the external surface of superior ramus
sphincter urethrae also takes origin from the conjoint ramus
Muscles that insert on the pubis:
rectus abdominis muscle (lateral head) just lateral to pubic crest
pyramidalis muscle just below the attachment of rectus abdominis
levator ani muscle (levator prostatae and puborectalis)
conjoint tendon at the pecten pubis
Ligamentous
pubofemoral ligament and obturator membrane at obturator crest
inguinal ligament (Poupart ligament) at pubic crest
ventral pubic ligament at medial aspect of anterior surface of body of pubis
puboprostatic ligament at the pelvic surface of body of pubis
lacunar ligament and pectineal ligament at the pecten pubis
Arterial supply
Branches of obturator, inferior epigastric, and medial circumflex femoral arteries.
Development
Ossification
One ossification center appears in the body of pubis at the prenatal 8th week, which fuses with the ossifying ischium to become a continuous ramus in the 7th or 8th year of life. The pubic tubercle, crest and symphyseal surface may have separate centers.
Related pathology
Quiz questions
References
- 1. Susan Standring. Gray's Anatomy. (2015) ISBN: 9780702052309 - Google Books
- 2. Paul Butler, Adam Mitchell, Jeremiah C. Healy et al. Applied Radiological Anatomy. (2012) ISBN: 9780521766661 - Google Books
- 3. Last, R. J., McMinn, R. M. H.. Last's Anatomy, Regional and Applied. (1994) ISBN: 044304662X - Google Books
- 4. Keith L. Moore, Arthur F. Dalley, A. M. R. Agur. Clinically Oriented Anatomy. (2013) ISBN: 9781451119459 - Google Books
Incoming Links
- Pectineus muscle
- Triradiate cartilage
- Bony pelvis
- Obturator foramen
- Ilium
- Transversalis fascia
- Iliopectineal line
- Acetabular fracture
- Arcuate line
- Acetabulum
- Inferior pubic ramus
- Apophyseal avulsion fractures of the pelvis and hip
- Innominate bones
- Adductor longus muscle
- Ossification centers
- Pyramidalis muscle
- Gracilis muscle
- Adductor brevis muscle
- Perivascular adductor longus muscle injury
- Hip joint
- Pubic rami fractures with chronic anterior superior iliac spine avulsion
- Ostitis condensans ilii and osteitis pubis
- Acetabular fracture
- Pelvis - muscle attachments (Gray's illustration)
- Pelvis - ossification centres (Gray's illustration)
- Normal radiographic anatomy of the hip
- Acetabulum fracture
- Pelvis: annotated frontal projection
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sacral plexus
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tarsometatarsal (Lisfranc) joint
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muscles of the lower limb
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