Walls & Floor of Pelvis

Question 1

Piriformis arises?

Answer 1

middle 3 pieces of sacrum/lateral mass

Question 2

Obturator internus on which wall?

Answer 2

lateral wall

Question 3

3 parts of pelvic floor/levator ani?

Answer 3

Pubo coccyxgeous
Ilio coccyxgeous
Ischio coccyxgeous

Question 4

Which pelvic floor muscles lift?

Answer 4

Pubo coccyxgeous

Ilio coccyxgeous

Question 5

which pelvic floor muscles doesn’t lift? why?

Answer 5

Ischio coccyxgeous, was for residual tail

Question 6

purpose of pelvic floor?

Answer 6

closes off pelvis from perineum

Question 7

Ischio coccyxgeous parallels which ligament?

Answer 7

sacrospinous ligament

Question 8

piriformis exits via?

Answer 8

greater sciatic foramen into gluteal region

Question 9

obturator internus location re: pelvis or peritoneum?

Answer 9

half in pelvis

half in peritoneum

Question 10

3 parts of the Pubo coccyxgeous?

Answer 10

1. pubo vaginalis/puboprotaticus most anterior slings around vagina/prostate
2. pubo rectalis blends with ano-rectal junction
3. Pubo coccyxgeous proper

Question 11

why is pubo rectalis important?

Answer 11

fecal retention

Question 12

where do you get dense fascia in pelvis?

Answer 12

over things that don’t move:
prostate
piriformis
back walls

Question 13

where do you get loose fascia in pelvis?

Answer 13

over things that move
pelvic floor
uterus
bladder

Question 14

endopelvic fascia condense where?

Answer 14

near neurovascular bundles that form ‘ligaments’ mostly arteries

Question 15

why is pelvic sepsis bad?

Answer 15

spread very quickly

Question 16

Common iliac artery splits into? what so they supply?

Answer 16

external iliac: lower limb

internal iliac: pelvic structures

Question 17

how is sacral plexus stuck onto piriformis?

Answer 17

via dense fascia

Question 18

2 branches of internal iliac? where do they go?

Answer 18

Anterior: some parietal, mostly visceral via ‘ligaments’ from side wall
Posterior: parietal branches

Question 19

where is pelvic viscera in relation to peritoneal cavity?

Answer 19

beneath the peritoneal cavity

Question 20

what are dependent folds/pouches?

Answer 20

the peritoneum viscera hangs between viscera eg. between bladder and colon

Question 21

what is the dependent pouch near rectum called?

Answer 21

Male: rectovesical pouch
Female: Recto-uterine pouch

Question 22

what is under the rectovesical pouch?

Answer 22

seminal vesicles

Question 23

bladder expands how? clinical significance?

Answer 23

up into peritoneum

can aspirate with needle if needed