Perineum Notes

Question 1

Perineum

Answer 1

Diamond shaped. Anal triangle and urogenital triangle

Question 2

Pelvic diaphragm

Answer 2

Divides viscera from ischiorectal fossa. Both levator ani and coccygeus muscles

Question 3

Levator ani

Answer 3

Innervated by s3,4 and inferior rectal

Question 4

Coccygeus

Answer 4

S4,5

Question 5

Anal triangle

Answer 5

Anal orifice, ischiorectal fossa, external anal sphincter

Question 6

Internal anal sphincter

Answer 6

Involuntary

Question 7

External anal sphincter

Answer 7

Three parts. Inferior rectal nerves and S4

Question 8

Ischiorectal fossa

Answer 8

Filled with fat. Pudendal vessels and nerve.

Question 9

Deep pouch

Answer 9

Sphincter urethra, deep transverse perinei, both perineal branch of pudendal.

Question 10

Superficial pouch male

Answer 10

Penis root. Pudendals

Question 11

Deep perineal male

Answer 11

Sphincter urethra, deep transverse perineal, bulbourethral

Question 12

Penis

Answer 12

Three cylindrical bodies. 2 dorsal copora cavernosum, 1 corposa spongiosum. Supported by fundiform and suspensory ligaments.

Question 13

Deep arteries of penis

Answer 13

Run in corpora cavernosa.

Question 14

Penis plexus

Answer 14

In tunica albiginea, drain to deep dorsal vein.

Question 15

Vulva

Answer 15

Mons pubis, labia majora, minora, vestibule.

Question 16

Scrotal layers

Answer 16

Skin, dartos muscle, external spermatic fascia, cremasteric fascia, internal spermatic fascia, tunica vaginalis(parietal then visceral), tunica albiguinia