Pelvic Walls Flashcards Preview

Gross II Final > Pelvic Walls > Flashcards

Flashcards in Pelvic Walls Deck (44):
1

What are the subdivisions of the pelvis?

Two lateral walls, a posterior wall, and a floor

2

The bony framework of the lateral wall is what part of the hip bone?

That which lies below the pelvic brim

3

What two things primarily cover the lateral wall of the pelvis?

Obturator internus muscle and obturator fascia

4

What makes up the bony framework of the posterior wall of the pelvis?

Sacrum and coccyx

5

Is the posterior wall convex or concave anteriorly?

Concave

6

What covers the lateral portion of the posterior wall of the pelvis?

Piriformis muscle and coccygeus (ischiococcygeus) muscle

7

Why is the floor of the pelvis more important among humans than other mammals?

Because we walk upright

8

What two things make up the pelvic floor?

Peritoneum (above) and pelvic diaphragm (below)

9

What is the space located between the rectum and bladder called?

Rectovesical pouch

10

What is the lowest point in the peritoneum of the male?

Rectovesical pouch

11

What is the space located between the rectum and uterus?

Rectouterine pouch

12

What is the space located between the bladder and uterus?

Vesicouterine pouch

13

What is a less common but possible site for ectopic pregnancy of the pelvic wall area?

Rectouterine pouch

14

Ascites and blood can pool in which downward reflections of the peritoneum?

Rectovesical or rectouterine pouch

15

What is the major support structure for pelvic viscera?

Pelvic diaphragm

16

The pelvic diaphragm consists of which muscles?

Coccygeus (ischiogoccygeus) and levator ani muscles

17

What is the major constituent of the pelvic diaphragm?

Levator ani muscle

18

What is the opening of the pelvic diaphragm that transmits the urethra in males and both the urethra and vagina in females?

Urogenital hiatus

19

What is the opening of the pelvic diaphragm that is found in both sexes?

Anal aperture

20

What is the origin of the coccygeus muscle?

Ischial spine and sacrospinous ligament

21

What is the insertion of the coccygeus muscle?

Coccyx and lower part of sacrum

22

What is the nerve supply of the coccygeus muscle?

Anterior primary rami of 3rd and 4th sacral nerves

23

What is the function of the coccygeus muscle?

Supports pelvic viscera, draws coccyx forward

24

What is the origin of the levator ani muscle?

Body of pubis, tendinous arch, ischial spine

25

What is the insertion of the levator ani muscle?

Coccyx and anococcygeal ligament

26

What is the nerve supply of the levator ani muscle?

Anterior primary rami of 3rd and 4th sacral nerves, perineal branch of pudendal nerve

27

What is the function of the levator ani muscle?

As a whole, supports pelvic viscera. Specialized parts of the levator ani perform other functions

28

What is the shape of the levator ani muscle?

Funnel-shaped

29

What are the three parts of the levator ani muscle?

Iliococcygeus, pubococcygeus, and puborectalis

30

What is the most posterior part of levator ani?

Iliococcygeus

31

What is the main part of levator ani?

Pubococcygeus

32

What part of the levator ani is located around the urogenital hiatus?

Pubococcygeus

33

What part of the pubococcygeus forms a sling around the urethra beneath the prostate in the male?

Puboprostaticus

34

What part of the pubococcygeus forms a sling around the urethra and vagina in the female?

Pubovaginalis

35

What part of the pubococcygeus attaches to the anorectal junction?

Puboanalis

36

Which parts of the pubococcygeus function in micturition?

Puboprostaticus and pubovaginalis

37

What is micturition?

"Bladder emptying"

38

What is the most important muscle for maintaining fecal matter (other than the anal sphincter)?

Puborectalis

39

Where is puborectalis located?

Behind the anorectal junction as a sling

40

What is the function of puborectalis?

Maintains angle at the anorectal junction (perineal flexure)

41

When is puborectalis relaxed?

During defecation

42

What is an extra function of puborectalis?

Directs the fetal head forward during parturition

43

What is the tendinous arch of levator ani?

Curved thickening of the obturator fascia which gives origin to parts of the pubococcygeus and iliococcygeus

44

What can misaligment of the sacrum affect when it comes to the pelvis?

Urinary continence, bowel/fecal continence, parturition, and integrity of the pelvic floor