Unit 3 Pelvic Walls Flashcards
False pelvis lies:
It is part of the:
Also known as the:
Above the pelvic brim
Part of the abdomen
Greater pelvis
True pelvis AKA
Lesser pelvis
Parts of the true pelvis
Pelvic inlet
Pelvic outlet
Pelvic walls
Pelvic floor
Posterior pelvic inlet (brim)
Sacral promontory
Alae (wings) of sacrum
Lateral pelvic inlet (brim)
Linea terminalis (arcuate line, pectin pubis, pubic crest)
Anterior pelvic inlet (brim)
Symphysis pubis
Anterior pelvic outlet
Symphysis pubis
Lateral pelvic outlet
Pubic arch
Ischial tuberosity
Sacrotuberous ligament
Posterior pelvic outlet
Coccyx
Pelvic walls
Anterior
Posterior
Lateral
Pelvic floor
Parts of the anterior pelvic wall
Symphysis pubis
Pubic bones
Parts of the post pelvic wall
Sacrum
Coccyx
Piriformis
Parts of the lateral pelvic wall
Piriformis
Innominate bone
Obturator membrane
Obturator internus
Sacrotuberous ligament
Sacrospinous ligament
What runs through the greater sciatic foramen?
Superior gluteal nerve and vessels
Piriformis
Inferior gluteal neurovasculars
Post femoral cutaneous nerves
Sciatic nerve
Quadratus femoris nerves and vessels
What lies in the lesser sciatic foramen
Vessels and nerve to obturator internus
Obturator internus muscle
Obturator canal contains the
Obturator nerve and vessels
Pelvic floor, AKA
Diaphragm
Pelvic floor is formed up:
Funnel shaped pelvic diaphragm
Muscles of the pelvic floor
Levator ani (3 of the 4 muscles)
Coccygeous
Function of the pelvic floor
Supports pelvic viscera
Separates the pelvic cavity from the perineum
Levator ani muscles
Iliococcygeus muscle
Pubococcygeus muscle
Puborectalis muscle
Muscle that makes a sling around the rectum and comes out the other side on the pubic. (Originates on the pubis)
Helps keep the rectus taught
Puborectalis.
Pubococcygeous
Originates from the:
Inserts:
Pubis
Into the anococcygeal body and the coccyx
Iliococcygeus goes from:
From the fascia over the obturator internus to the anococcygeal body
Functions of the levator ani
Supports pelvic viscera
Resis intrapelvic pressure during straining
Sphincter action of the anorectal junction and vagina
Nerve supply to the levator ani
Anterior rami of S4
Pudendal nerve (inf rectal branch)
OR of coccygeus
Spine of ischium
Insertion of coccygeus
Sacrum and coccyx
Nerve supply of coccygeus
S3 and S4
Action of coccygeus
Supports pelvic viscera
Pulls coccyx forward