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FALSE PELVIS AND TRUE PELVIS

 

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                            FALSE PELVIS

  • The false pelvis, also called the greater or major pelvis.
  • The greater pelvis is the space enclosed by the pelvic girdle and in front of the pelvic brim.
  • It is the bony area between the iliac crests and is superior to the pelvic inlet.
  • It is bounded on either side by the ilium
  • t is generally considered part of the abdominal cavity
  • Also referred as ABDOMINOPELVIC CAVITY
  • It has little obstetric relevance

BONY BOUNDARIES

  • Anteriorly; abdominal wall
  • Laterally; Ala of ilium
  • Posteriorly; L5 and S1 vertebrae
  • Front; incomplete, wide interval between anterior borders of ilia
  • Base; sacrum

ORGANS IN FALSE PELVIS

It supports;

  • Intestines (loops of ileum and sigmoid colon)

 NERVES The femoral nerve  from L2-L4 is in the greater pelvis

                               TRUE PELVIS

  • The true pelvis, also called the lesser or minor pelvis.
  • The lesser pelvis is the space enclosed by the pelvic girdle
  • It lies between the pelvic inlet and the pelvic outlet.
  • The true pelvis area makes up the pelvic cavity.
  • This cavity is a short, curved channel, deeper on its posterior than on its anterior.

BONY BOUNDARIES

  • Front and below; pubic symphysis and superior rami of pubis
  • Above and behind; sacrum and coccyx
  • Laterally; superior ramus of ischium and part of ilium below arcuate line
  • Roof; pelvic brim
  • Anterior; pubic symphysis
  • Floor; pelvic floor

ORGANS IN TRUE PELVIS

It contains

  • Rectum
  • Bladder
  • Pelvic colon

In females

  • Reproductive organs; uterus & vagina

NERVES The pelvic splanchnic nerves arising at S2–S4 are in the lesser pelvis.



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