Pelvis

Pelvis

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This article is about the large compound hip structure. For the renal analog, see Renal pelvis.

Bone: Pelvis
Female type pelvis from Gray's Anatomy
Male type pelvis from Gray's Anatomy
Gray's	subject #57 236
Dorlands / Elsevier	p_10/12623123

The pelvis (pl. pelvises or pelves) is the bony structure located at the base of the spine (properly known as the caudal end). It is part of the appendicular skeleton. Each os coxae (hipbone) consists of three bones: the ilium, ischium, and the pubis. The ilium is the largest and upper most part, the ischium is the posterior-inferior (back-lower) part, and the pubis is the anterior (front) part of the hipbone. The two hipbones are joined anteriorly at the symphysis pubis and posteriorly to the sacrum. The pelvis incorporates the socket portion of the hip joint for each leg (in bipeds) or hind leg (in quadrupeds). It forms the lower limb (or hind-limb) girdle of the skeleton.

Contents [hide] 1 Sex differences 2 References 3 Additional images 4 See also 5 External links

[edit] Sex differences

Main article: Sex differences in humans

• Infrapubic angle is greater than 90˚ in females and less than 90˚ in males
• Pelvic inlet in males is more heart-shaped, while in females it is more round or oval
• Greater sciatic notch narrower in males
• Acetabulum in males faces more laterally, while it faces more anteriorly in females
• Sacrum more triangular in females^[1]

There are four main types of pelvis

• Gynaecoid
  • Normal female pelvis
  • Round with enlarged transverse diameter
• Android
  • Normal male pelvis
  • Heart shaped
• Anthropoid
  • Long anterior to posterior diameter
• Platypelloid
  • Long transverse diameter

[edit] References

1. ^ Saukko P, Knight B. Knight's Forensic Pathology, 3rd Ed. Edward Arnold Ltd. 2004. ISBN 0-340-76044-3.

www.doratheexplorerrocks.com

[edit] Additional images

Radiograph of a healthy human hip joint	Median sagittal section of pelvis.	Articulations of pelvis. Anterior view.	Articulations of pelvis. Posterior view.
Left hip-joint, opened by removing the floor of the acetabulum from within the pelvis.

[edit] See also

• Bone terminology
• Terms for anatomical location
• Hip fracture
• Lesser pelvis
• Greater pelvis
• Pelvic cavity
• Pelvic fracture
• Pelvic Bone Width
• Coccyx (tailbone)

[edit] External links

• Pelvis at eMedicine Dictionary
• Coccyx pain, tailbone pain, coccydynia (Peer-reviewed medical chapter, available free online at eMedicine)

[hide] v • d • e Bones of pelvis/pelvic cavity
General	sacrum, coccyx, hip bone
Ilium	Body (Arcuate line) Wing: gluteal lines (Posterior, Anterior, Inferior) - Fossa - iliac spines (Anterior superior, Anterior inferior, Posterior superior, Posterior inferior) - Crest - Tuberosity
Ischium	Body (Ischial spine, Lesser sciatic notch) - Superior ramus (Tuberosity of the ischium) - Inferior ramus
Pubis	Body - Superior ramus (Pubic tubercle, Pubic crest, Obturator crest) - Inferior ramus (Pectineal line)
Compound	Acetabulum (Acetabular notch) - Iliopubic eminence/Iliopectineal line - Linea terminalis - Ischiopubic ramus/Pubic arch Obturator foramen - Greater sciatic foramen/Greater sciatic notch - Lesser sciatic foramen Lesser pelvis (Pelvic inlet, Pelvic brim, Pelvic outlet) - Greater pelvis

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