FALSE PELVIS AND TRUE PELVIS

 

                            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.