Perineum

Question 1

diamon shaped external surface around the anus and reproductive organs

Answer 1

perineum

Question 2

external perineum is bounded by

Answer 2

anteriorly - mons pubis
laterally - medial thighs
posteriorly - gluteal folds

Question 3

internal perineum is bounded by

Answer 3

anterior - pubic symphysis
anterolaterally - inferior pubic rami and ischial rami
laterally - ischial tuberosities
posterolaterally - sacrotuberous ligaments
posteriorly - coccyx
roof - pelvic diaphragm
inferior - flesh/skin

Question 4

triangle which is posterior to the perineal body

Answer 4

anal triangle

Question 5

area which contains the root of the scrotum in males and external genitalia in females

Answer 5

urogenital triangle

Question 6

midpoint of the line dividing the perineum into 2 triangles is

Answer 6

perineal body

Question 7

what 4 muscles converge upon the perineal body

Answer 7

1. bulbospongiosus m
2. external anal sphincter
3. superficial transverse perineal m
4. deep transverse perineal m

Question 8

inferior fascia of the urogenital diaphragm

Answer 8

perineal membrane

Question 9

serves to separate the superficial from the deep perineal pouch

Answer 9

perineal membrane

Question 10

what 2 structures attach superior to the perineal membrane

Answer 10

1. deep transverse perineal muscles

2. external urethral sphincter

Question 11

what attaches posterior to perineal membrane

Answer 11

perineal body

Question 12

subcutaneous fascia which consists of superficial fatty layer and a deep layer (colles’ fascia)

Answer 12

superficial perineal fascia

Question 13

females: fatty layer persists into the labia and to the mons pubis where it becomes camper’s fascia

Answer 13

superficial perineal fascia

Question 14

males: fatty layer is replaced by ______ while the membranous layer is continuous with the _____ of the penis and scrotum in the SUPERFICIAL fascia

Answer 14

dartos (smooth) muscle

dartos fascia

Question 15

fascia which invests the ischiocavernosus, bulbospongiosus, and superficial transverse perineal muscles

Answer 15

deep perineal fascia (gallaudet’s fascia)

Question 16

males contents within the superficial perineal fascia

Answer 16

1. bulb and crura of penis
2. ischiocavernosus and bulbospongiosus m
3. proximal spongy urethra
4. superficial transverse perineal muscles
5. perineal arteries/nerves

Question 17

females contents within the superficial perineal fascia

Answer 17

1. bulb of vestibule
2. crura of clitoris
3. ischiocavernosus and bulbospongiosus m
4. superficial transverse perineal m
5. greater vestibular glands
6. perineal nerves/arteries

Question 18

deep perineal pouch for both males and females contain

Answer 18

branches of the dorsal nerve/artery/vein

Question 19

ischioanal fossae is also known as

Answer 19

ischiorectal fossae

Question 20

what is the roof, lateral wall, and medial wall of the ischioanal fossae

Answer 20

roof - pelvic diaphragm
lateral - ischium and obturator internus muscle
medial - anal canal

Question 21

the lateral walls of the ischioanal fossae contain what canal

Answer 21

pudendal canal of Alcock

Question 22

what are the contents within the pudendal canal of Alcock

Answer 22

internal pudendal vessels, pudendal nerve, dorsal nerve of penis/clitoris

Question 23

what 3 nerves does the pudendal nerve split into

Answer 23

1. perineal nerves
2. dorsal nerve to penis or clitoris (deepest)
3. inferior rectal nerve (S4)

Question 24

skeletal muscle located around the inferior end of the anal canal; blends superiorly with the puborectalis muscle

Answer 24

external anal sphincter

Question 25

smooth muscle located around the superior aspect of the anal canal

Answer 25

internal anal sphincter

Question 26

divides the anal canal into the superior part derived from the hindgut and inferior part derived from the proctodeum

Answer 26

pectinate line

Question 27

distal and enlarged conical end of the corpus spongiosum. contained within - ectodermal derivative, the navicular fossa

Answer 27

glans penis

Question 28

originate proximally at the ischiopubic rami as the crura of the penis and then are fused at midline

Answer 28

corpus cavernosa

Question 29

crura of the cavernosa are surrounded by the

Answer 29

ischiocavernosus muscles

Question 30

begins proximally as the bulb of the penis which is penetrated by the membranous urethra

Answer 30

corpus spongiosum

Question 31

bulb of the spongiosum is surrounded by the

Answer 31

bulbospongiosus muscle

Question 32

deep fascia of the anterior surface of the pubic symphysis that blends with buck's fascia to suspend the penis

Answer 32

suspensory ligament

Question 33

foreskin that covers the glans penis

Answer 33

prepuce

Question 34

drains the skin of the penis, superficial to bucks fascia

Answer 34

superficial dorsal vein of the penis

Question 35

vein deep to bucks fascia that drains the cavernous spaces and into prostatic venous plexus

Answer 35

deep dorsal vein of the penis