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Osteology, joints and ligaments
of the pelvis
The Pelvis is the region of the body that unites the trunk with the lower limbs and is
continuous with the abdomen. The pelvis is medically used in relation to the pelvic
girdle, the bowl-shaped bony structure.
The bony pelvis is made up of 4 bones:
The Sacrum (posterior)
The Coccyx (posterior)
The 2 Os coxae or hip bones. (anterior and lateral)
The pelvis may be divided into two parts via the pelvic brim, this is an ocular,
angulated imaginary plane that can be drawn through the:
Iliopectineal lines (arcuate and pectineal lines) and iliopubic eminence laterally
The sacral promontory and sacral ala posteriorly
The pubic crest and symphysis pubis anteriorly
The angle of the pelvic brim is about 55-60 degrees to the horizontal
The pelvic brim has a transverse diameter of about 13cm and an anteroposterior
diameter (true conjugate) of about 11.5cm
Osteology, joints and ligaments of the pelvis 1
, This pelvic brim also serves as the pelvic cavity inlet. It divides the pelvis into the
false pelvis superiorly and the true pelvis inferiorly. The false pelvis mainly contains
the iliac fossa and crest, housing abdominal viscera and is of little clinical
importance. On the other hand, the true pelvis houses the pelvic viscera contained
within the short pelvic cavity.
Osteology, joints and ligaments of the pelvis 2
Osteology, joints and ligaments
of the pelvis
The Pelvis is the region of the body that unites the trunk with the lower limbs and is
continuous with the abdomen. The pelvis is medically used in relation to the pelvic
girdle, the bowl-shaped bony structure.
The bony pelvis is made up of 4 bones:
The Sacrum (posterior)
The Coccyx (posterior)
The 2 Os coxae or hip bones. (anterior and lateral)
The pelvis may be divided into two parts via the pelvic brim, this is an ocular,
angulated imaginary plane that can be drawn through the:
Iliopectineal lines (arcuate and pectineal lines) and iliopubic eminence laterally
The sacral promontory and sacral ala posteriorly
The pubic crest and symphysis pubis anteriorly
The angle of the pelvic brim is about 55-60 degrees to the horizontal
The pelvic brim has a transverse diameter of about 13cm and an anteroposterior
diameter (true conjugate) of about 11.5cm
Osteology, joints and ligaments of the pelvis 1
, This pelvic brim also serves as the pelvic cavity inlet. It divides the pelvis into the
false pelvis superiorly and the true pelvis inferiorly. The false pelvis mainly contains
the iliac fossa and crest, housing abdominal viscera and is of little clinical
importance. On the other hand, the true pelvis houses the pelvic viscera contained
within the short pelvic cavity.
Osteology, joints and ligaments of the pelvis 2
