Perineum Flashcards Preview

Jonathan's Reproduction > Perineum > Flashcards

Flashcards in Perineum Deck (26)
Loading flashcards...
1

What are the two triangles of the perineum?

urogenital triangle
anal triangle

2

Which two structures enclose the perineum

levator ani above, superficial fascia below

3

The perineal membrane splits the urogenital triangle into which two regions?

superficial and deep perineal pouch

4

What is the thickened midline structure of the perineum?

perineal body

5

Which two transverse muscles reinforce the perineal body

superficial and deep transverse perineal muscles

6

What is the name of the fat filled space in the anal triangle?

ischial-rectal fossa

7

Which muscle can be found on the side wall of the perineum

obturator internus

8

Which vessels are found in the pudendal canal

internal pudendal vessel and pudendal nerve

9

What does the pectinate line of the anal canal demarcate

the internal 2/3, lined by mucus and the external 1/3, lined by skin

10

What is the vascular supply for the
1) upper 2/3
2) lower 1/3 of the anal canal

1) superior rectal artery and portal venous system
2) inferior rectal artery and systemic venous system

11

T/F the entire anal canal receives autonomic nervous supply

False, only the upper 2/3. The lower 1/3 gets pudendal, somatic supply

12

What is the internal anal sphincter innervated by

ANS

13

What are the three parts of the external anal sphincter

deep, superficial and subcutaneous

14

Which muscle does the deep external sphincter fuse with

the pubo-rectal sling, part of the pubococcygeus

15

What are the anterior and posterior anchors of the superficial external anal sphincter

anteriorly to the perineal body, and posteriorly to the coccyx

16

T/F subcutaneous external anal sphincter blends with the subcutaneous fat

True

17

T/F All of the sphincters are in the superficial perineal pouch

False, they are all in the deep perineal pouch, anchored to the perineal body

18

What are the five parts of the male urethra

Pre-prostatic, where internal urethral sphincter is
prostatic, with openings of ejaculatory duct
membranous, in deep perineal pouch
spongy, then penile part

19

What are the names of the male erectile tissue

corpus cavernosum x2, above the corpus spongeosum

20

Which erectile tissue surrounds the urethra

corpus spongeosum

21

What are the muscles covering male erectile tissue

ischial caverosus for CC
bulbospongeosus for CS

22

Which spinal segments give rise to the pudendal nerve

S2-S4

23

Describe the course of the pudendal nerve

Starts in the pelvis, then exists via GSF with piriformis, winds back into perineum via LSF, into the anal triangle

24

What is the first branch of the pudendal nerve

inferior rectal nerve

25

What is the terminal branch of pudendal nerve

dorsal nerve of the clitoris or penis

26

the perineal nerve gives which two divisions

motor (deep) division and cutaneous (superficial) division