Pelvic Contents Flashcards
name the 3 components of the Os Coxae
Ileum
Ischium
Pubis
what 2 structures form the obturator foramen?
ischium & pubis
what structures form the acetabular fossa?
Ileum
Ischium
Pubis
what structures form linea terminalis?
arcuate line + pectineal line
what structures form the pelvic brim?
- iliopectineal line or linea terminalis
- sacral promontory
- ala of ileum
- pubic symphysis
what represents the division between the greater/false and lesser/true pelvis?
pelvic brim:
above = greater/false
below = lesser/true
the false pelvis consists of the ____ and contains ____
Ala of ilium above linea terminalis
Abdominal viscera
the true pelvis is bound by the ____ and ____
pelvic inlet and pelvic outlet
pelvic inlet
linea terminalis
pelvic outlet
- bound posteriorly by sacrum & coccyx
- bound anteriorly by pubic symphysis
in the female pelvis, the pelvic outlet is represented by the ____
birth canal: must pass fetal head
what are the male and female names for the pelvis?
male = android
female = gynaecoid
describe sex differences of the pelvis
Male:
- heart shaped pelvic brim
- acute angle pelvic arch
- ligaments form diamond shape
- sacrum flexed anteriorly
Female:
- oval shaped pelvic brim
- obtuse angle pelvic arch
- ligaments form oval shape
- sacrum flexed posteriorly
what muscles form the pelvic diaphragm (pelvic floor)?
levator ani
coccygeus (ischiococcygeus)
what are the components of levator ani?
- pubococcygeus
- iliococcygeus
what are the 2 parts of pubococcygeus in males?
- levator prostatae
- puborectalis
what are the 2 parts of pubococcygeus in females?
- sphincter vaginae
- puborectalis
what muscles form the lateral wall of the pelvis?
obturator internus + piriformis
Origin & insertion of coccygeus
O: ischial spine & sacrospinous ligament
I: coccyx & inferior sacrum
actions of coccygeus
- anterior pull of coccyx
- compress pelvic outlet & support pelvic viscera with levator ani
innervation of coccygeus
ventral rami (S4, S5)
Origin & insertion of pubococcygeus
O: pubis & tendinous arch
I: coccyx & ventral sacrococcygeal ligament
actions of pubococcygeus
- compress pelvic outlet
- support pelvic viscera
innervation of pubococcygeus
inferior rectal nerve
origin & insertion of iliococcygeus
O: iliac part of tendinous arch & ischial spine
I: coccyx & anococcygeal ligament
actions of iliococcygeus
- compress pelvic outlet
- support pelvic viscera
innervation of iliococcygeus
inferior rectal nerve & S4 ventral ramus
name the common structures of the true pelvis in male and females
- common iliac vessels; internal iliac vessels & external iliac vessels
- urinary bladder
- ureters
- rectum & anus
- autonomic nn
- nn of lumbosacral plexus
name the contents of the true pelvis specific to males
- prostate gland
- seminal vesicles
- ductus deferens
name the contents of the true pelvis specific to females
- uterus
- ovaries
- vagina
name the branches of the common iliac artery
internal & external iliac aa
name the branches of the internal iliac artery
anterior branch/trunk
posterior branch/trunk
name the branches of the anterior branch of the internal iliac artery
- patent part of umbilical a
- superior vesicle aa
- obturator a
- medial umbilical ligament (remnant of umbilical a)
- inferior gluteal a
- internal pudendal a
- inferior vesicle a
- middle rectal a
name the branches of the posterior branch of the internal iliac artery
- iliolumbar a
- lateral sacral a
- superior gluteal a
name the branches of the external iliac artery
inferior epigastric a
deep circumflex iliac a
the inferior epigastric artery anastomoses with the ____
superior epigastric a
the external iliac artery becomes the ____ when it passes under the ____
femoral a
inguinal ligament
the superior gluteal artery may arise from the ____ or the ____
- internal pudendal a
- inferior gluteal artery
the iliolumbar artery may arise from the ____ before it divides into…
- internal iliac artery
- anterior and posterior branches
the superior gluteal, inferior gluteal, and internal pudendal arteries may all arise from…
a common stem
the obturator artery may be replaced by an enlarged ____ branch of the ____, termed the ____
- pubic branch
- inferior epigastric a
- abnormal obturator a
how do branches of the internal iliac artery vary by sex?
in females:
- inferior vesicle a replaced by uterine a that arise with middle rectal a
- branches off uterine a may include several vaginal aa and the inferior vesicle a
