Pelvic Contents

Question 1

name the 3 components of the Os Coxae

Answer 1

Ileum
Ischium
Pubis

Question 2

what 2 structures form the obturator foramen?

Answer 2

ischium & pubis

Question 3

what structures form the acetabular fossa?

Answer 3

Ileum
Ischium
Pubis

Question 4

what structures form linea terminalis?

Answer 4

arcuate line + pectineal line

Question 5

what structures form the pelvic brim?

Answer 5

• iliopectineal line or linea terminalis
• sacral promontory
• ala of ileum
• pubic symphysis

Question 6

what represents the division between the greater/false and lesser/true pelvis?

Answer 6

pelvic brim:
above = greater/false
below = lesser/true

Question 7

the false pelvis consists of the ____ and contains ____

Answer 7

Ala of ilium above linea terminalis
Abdominal viscera

Question 8

the true pelvis is bound by the ____ and ____

Answer 8

pelvic inlet and pelvic outlet

Question 9

pelvic inlet

Answer 9

linea terminalis

Question 10

pelvic outlet

Answer 10

• bound posteriorly by sacrum & coccyx
• bound anteriorly by pubic symphysis

Question 11

in the female pelvis, the pelvic outlet is represented by the ____

Answer 11

birth canal: must pass fetal head

Question 12

what are the male and female names for the pelvis?

Answer 12

male = android
female = gynaecoid

Question 13

describe sex differences of the pelvis

Answer 13

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

Question 14

what muscles form the pelvic diaphragm (pelvic floor)?

Answer 14

levator ani
coccygeus (ischiococcygeus)

Question 15

what are the components of levator ani?

Answer 15

• pubococcygeus
• iliococcygeus

Question 16

what are the 2 parts of pubococcygeus in males?

Answer 16

• levator prostatae
• puborectalis

Question 17

what are the 2 parts of pubococcygeus in females?

Answer 17

• sphincter vaginae
• puborectalis

Question 18

what muscles form the lateral wall of the pelvis?

Answer 18

obturator internus + piriformis

Question 19

Origin & insertion of coccygeus

Answer 19

O: ischial spine & sacrospinous ligament
I: coccyx & inferior sacrum

Question 20

actions of coccygeus

Answer 20

• anterior pull of coccyx
• compress pelvic outlet & support pelvic viscera with levator ani

Question 21

innervation of coccygeus

Answer 21

ventral rami (S4, S5)

Question 22

Origin & insertion of pubococcygeus

Answer 22

O: pubis & tendinous arch
I: coccyx & ventral sacrococcygeal ligament

Question 23

actions of pubococcygeus

Answer 23

• compress pelvic outlet
• support pelvic viscera

Question 24

innervation of pubococcygeus

Answer 24

inferior rectal nerve

Question 25

origin & insertion of iliococcygeus

Answer 25

O: iliac part of tendinous arch & ischial spine
I: coccyx & anococcygeal ligament

Question 26

actions of iliococcygeus

Answer 26

• compress pelvic outlet
• support pelvic viscera

Question 27

innervation of iliococcygeus

Answer 27

inferior rectal nerve & S4 ventral ramus

Question 28

name the common structures of the true pelvis in male and females

Answer 28

• common iliac vessels; internal iliac vessels & external iliac vessels
• urinary bladder
• ureters
• rectum & anus
• autonomic nn
• nn of lumbosacral plexus

Question 29

name the contents of the true pelvis specific to males

Answer 29

• prostate gland
• seminal vesicles
• ductus deferens

Question 30

name the contents of the true pelvis specific to females

Answer 30

• uterus
• ovaries
• vagina

Question 31

name the branches of the common iliac artery

Answer 31

internal & external iliac aa

Question 32

name the branches of the internal iliac artery

Answer 32

anterior branch/trunk
posterior branch/trunk

Question 33

name the branches of the anterior branch of the internal iliac artery

Answer 33

• 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

Question 34

name the branches of the posterior branch of the internal iliac artery

Answer 34

• iliolumbar a
• lateral sacral a
• superior gluteal a

Question 35

name the branches of the external iliac artery

Answer 35

inferior epigastric a
deep circumflex iliac a

Question 36

the inferior epigastric artery anastomoses with the ____

Answer 36

superior epigastric a

Question 37

the external iliac artery becomes the ____ when it passes under the ____

Answer 37

femoral a
inguinal ligament

Question 38

the superior gluteal artery may arise from the ____ or the ____

Answer 38

• internal pudendal a
• inferior gluteal artery

Question 39

the iliolumbar artery may arise from the ____ before it divides into…

Answer 39

• internal iliac artery
• anterior and posterior branches

Question 40

the superior gluteal, inferior gluteal, and internal pudendal arteries may all arise from…

Answer 40

a common stem

Question 41

the obturator artery may be replaced by an enlarged ____ branch of the ____, termed the ____

Answer 41

• pubic branch
• inferior epigastric a
• abnormal obturator a

Question 42

how do branches of the internal iliac artery vary by sex?

Answer 42

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