pelvic walls, vessels, and nerves Flashcards
what is the major function of the interosseous sacroiliac ligament?
Major bond between sacrum and ilium
connect sacral and iliac tuberosities
what are the 2 main functions of the bony pelvis?
transmits body weight from vertebral column to limbs
provides attachment for muscles
what does the posterior sacroiliac ligament connect?
posterior surface of the sacrum at the intermediate and lateral sacral crests to the posterior part of the ileum
what is the anterior sacroiliac ligament?
thickening of the anterior inferior joint capsule
what attaches to the iliolumbar ligament?
quadratus lumborum
both the pubic symphysis and sacrococcygeal joint are what type of joints
cartilaginous
what 2 things is the lesser pelvis/ true pelvis divided into?
pelvic inlet
pelvic outlet
what boundaries make up the pelvic outlet?
corners: pubic symphysis, coccyx, ischial tuberosity
sides: sacrotuberous ligaments and ischiopubic rami
what is the origin of the levator ani muscle?
posterior aspect of body of pubis, tendinous arch of levator ani, and ischial spine
what 3 parts is the levator ani divided into?
pubococcygeus
puborectalis
iliococcygeus
what is the innervation of the levator ani?
ventral rami of S2 to S4 + pudendal nerves
what is the innervation of the coccygeus muscle?
ventral rami of S3 and S4 spinal nerves
what are the main actions of the pelvic diaphragm?
support and maintain pelvic viscera
contract w/ abdominal muscles and diaphragm to increase abdominal pressure
sphincteric action
what is significant about the uterine artery?
it runs medially toward the uterus and crosses the ureter superiorly
follows the Fallopian tube toward the ovary
tributaries of the internal iliac vein correspond w/ those of the artery except what?
there is not an umbilical vein
