Pelvis Flashcards
What are the male and female pelvic differences?
male has narrower angle between inferior pubic rami
What makes the dimples in the back?
posterior superior iliac spine
What bone do you sit on?
ischial tuberosity
What attaches to the pubic tubercle?
inguinal ligament
What is the false pelvis?
Pelvis major
lowermost part of the abdominal cavity between the iliac fossa
What is the true pelvis?
Pelvis minor
inferior to superior pelvic aperture
contains pelvic viscera
Why is the distance between female ischial spines useful?
can determine if need c section
What are the contents of the pelvis?
1 rectum
2 bladder
3 uterus/vagina or protatate glands
Where isthe sacrotuberous ligament?
from lateral sacrum and coccyx to medial side of ischial tuberosity
Where is the sacrospinous ligament?
from lateral sacrum and coccyx to ischial spine
splits and makes 2 foramen
How does the obturator internus run?
makes 90 degree turn out lesser sciatic foramen
under ischial spine
to greater trochanter
Obturator internus
Origin inner surface of obturator membrane and rim of pubis and ischium bordering membrane
Insertion middle part of medial aspect of greater trochanter of femur
action laterally rotates and stabilizes hip
nerve nerve to obturator internus L5, S1, 2
Pirifomis
Origin 2,3,4 costrotransverse bars of anterior sacrum, few fibers from superior border of greater sciatic notch
Insertion anterior part of medial aspect of greater trochanter of femur
action laterally rotates and stabilzies hip
nerve anterior primary rami of S1,2
What forms the floor of the pelvic cavity?
pelvic diaphragm (levator ani + coccygeous
What covers the sacrospinal ligament?
coccygeous- from ischial spine and sacrospinous lig to coccyx
What are the levator ani muscles?
iliococcygeous
pubococcygeous
puboretalias
supplied by branches of sacral pleus S3-S5
prudential nerve helps a little
inserts on fascia of operatur inturnus on ARCUS tendonaeus (where pelvic diaphragm meets OI)
What are the 2 types of pelvic fascia?
continous with transveralis fascia
1 parietal = lines the walls of the pelvic cavity
2 visceral = loose connective tissue surrounding the viscera (continous with pareital)
Coccygeous muscle
Origin ischial spine
Insertion lower end of sacrum and coccyx
action assist the levator ani in supporting the pelvic viscera
nerve branches of 4th and 5th sacral nerves
What keeps your guts from falling out?
levator ani and coccygeous = pelvic diaphragm
Where does the opturator artery run?
branch of anterior division of internal iliac
through obturator foramen to medial thigh