Practical class 3

Question 1

Perineum - what structures are included?

Answer 1

external genitalia
perineal muscles
anal canal

Question 2

2 triangles of perineum

Answer 2

anal

urogenital

Question 3

Fascia which stretches from left to right sides of pubic arch

Answer 3

perineal membrane

Question 4

External anal sphincter innervation and function

Answer 4

branch of pudendal nerve

constricts anal canal, continence, support pelvic floor

Question 5

Innervation of muscles of perineum

Answer 5

pudendal

Question 6

function of bulbospongiosus

Answer 6

compress bulb of penis to eliminate last drops of urine or sperm
support pelvic floor

Question 7

Function of ischiocavernosus

Answer 7

maintenance of erection by blocking blood supply into the veins

Question 8

Which muscles converge towards the perineal body?

Answer 8

superficial transverse perineal muscle 
deep transverse perineal muscle 
bulbospongiosus
external anal sphincter 
levator ani, external urethral sphincter, rectum muscles

Question 9

What structure traverses the superficial and deep perineal pouches?

Answer 9

urethra

Question 10

6 levels of the pelvis

Answer 10

peritoneal cavity 
subperitoneal space 
ischioanal fossa
deep perineal space 
superficial perineal space 
subcutaneous perineal space

Question 11

What does the superficial perineal pouch surround?

Answer 11

external genitalia

Question 12

What does the deep perineal pouch surround?

Answer 12

deep transverse perineal muscle

Question 13

3 parts of male urethra

Answer 13

membranous
prostatic
spongy

Question 14

widest and narrowest parts of prostate

Answer 14

prostatic - widest

membranous - narrowest

Question 15

Ischio-anal fossae

Answer 15

inferior to pelvic floor and lateral to anal canal

allow anal canal to expand during defaecation

Question 16

pudendal canal contents

Answer 16

internal pudendal vessels

pudendal nerve and perineal nerve

Question 17

major content of ischio-anal fossae and relevance

Answer 17

fat - abscess formation

Question 18

what foramen does the pudendal canal enter the ischio-anal fossae

Answer 18

lesser sciatic foramen