ORG ANA: Pelvic Wall Flashcards
describe the shape of the pelvis
bowl-shaped or basin shaped
what does the pelvis connect
connection between abdomen/trunk and LE
what are the 3 main functions of the pelvis
transmits weight of body from VC to femurs
support and protect pelvic viscera
attachment for trunk and LE muscles
what does the pelvis contain
lower GI and urinary tract
organs of reproduction
nerves, vessels and lymphatics
what is the lateral and anterior wall of the pelvis and its articulations
the 2 hip bones
in front - symhpysis pubis
post - sacroiliac joint
what is the posterior wall of the pelvis
sacrum and coccyx
what are the 2 parts of the pelvis
false and true pelvis
what is the pelvic brim
it marks the boundary between the true and false pelvis
above it - false
below it - true
what makes up the pelvic brim
ant - symphysis pubis
post - sacral promontory
lat - iliopectineal lines
what is the sacral promontory
anterior upper margin of S1
what are iliopectineal lines
lines that run downward and forward in the inner surface of the ileum
what is the symphysis pubis
joint betw the 2 pubic bones
describe the location of symphysis pubis and ASIS
they lie in the same vertical plane
pelvic orientation of symphysis pubis
faces upward and backward
pelvic orientation of the sacrum
directed downward forward
boundaries of the false pelvis
ant - lower abdominal muscles
post - 5 lumbar vertebrae
lat - iliac fossa and iliacus
the false pelvis is considered a part of ______ cavity
abdominal cavity
purpose of false pelvis
supports abdominal content
guides fetus to true pelvis at early stages
supports uterus at 3 months above
what makes up the true pelvis
pelvic inlet, outlet and cavity
what are the boundaries of pelvic outlet
ant - pubic arch
post - coccyx
lat - ischial tuberosities
margin - sarcotuberous ligament
what are the 3 wide notches of the pelvic outlet
ant - pubic arch
lat - sciatic notches; lesser and greater
what divides the sciatic notches
divided by sarcotuberous and sacrospinous ligaments into greater and lesser foramen
where is the pelvic cavity located
between inlet and outlet
what are the contents of the pelvic cavity
lower portion of intestines and rectum
urinary bladder
internal reproductive organs
what forms the anterior wall of true pelvis
bodies of pubic bone, pubic rami and symphysis pubis
it has the shallowest wall in true pelvis
anterior wall
it has extensive wall in true pelvis
posterior wall
what forms the posterior wall of true pelvis
sacrum, coccyx and piriformis
what covers the posterior wall of true pelvis
parietal pelvic fascia
openings of the posterior wall of true pelvis
anterior sacral foramina
greater and lesser sciatic foramen
what passes through the anterior sacral foramina
anterior rami of sacral spinal nerves
what passes through greater sciatic foramen
exit from true pelvis to gluteal region for sciatic, pudendal, gluteal nerves/vessels
what forms the lateral wall of pelvis
hip bone below pelvic inlet
obturator membrane
sarcotuberous ligament and sacrospinous ligament
obturator internus and fascia
opening of lateral wall
obturator foramen
what covers the obturator foramen
obturator membrane
what are the contents of the obturator foramen
passage of obturator nerve to leave pelvis and enter thigh
what forms the inferior wall
formed by pelvic diaphragm
function of pelvic diaphragm
divides true pelvis into main cavity and perineum
function of inferior wall
supports the pelvic viscera
identify the type of pelvis
most common type - 41%
gynecoid