Anatomy of the Perineum

Question 1

Urogenital triangle

Answer 1

Between the two ischial spines and the pubic symphysis

Faces inferiorly

Question 2

Anal triangle

Answer 2

Between the two ischial spines and the coccyx

Faces posteriorly

Question 3

Ischio-anal fossa

Answer 3

The space inferior to the levator ani, but above the perineal membrane
In life is filled with loose CT

Question 4

Perineal pouch contents in the

1. Male
2. Female

Answer 4

1. Bulbourethral glands, deep transverse perineal muscle, external urethral sphincter
2. Deep transverse perineal muscle, external urethral sphincter, compressor urethreae, sphincter urethrovaginalis

Question 5

How many urethral sphincters are there in
1. Males
3. Females
and what are they?

Answer 5

1. One (external urethral sphincter)

2. Three (external urethral sphincter, compressor urethreae, sphincter urethrovaginalis)

Question 6

What muscle covers the

1. Corpus cavernosa
2. Corpus spongiosum

Answer 6

1. Ischiocavernous muscle

2. Bulbospongiosus muscle

Question 7

Perineal body

Answer 7

Anchors the 2 trianges together

Question 8

Structures in the female perineum

Answer 8

Corpus cavernosum (gives rise to body of clitoris)
Glans clitoris
Bulb of the vestibule
Greater vestibular gland

Question 9

Pudendal nerve comes from what sacral regions?

Answer 9

S2,3,4

Question 10

Pudendal nerve travels in what path?

Answer 10

Out the greater sciatic foramen, loops around the sacrospinous ligament, back into the anal triangle through the lesser sciatic foramen

Question 11

3 branches of the pudendal nerve

Answer 11

Dorsal nerve of the clitoris/penis
Perineal nerve
Inferior rectal nerve