Perineum

Question 1

2 subdivisions of perineum

Answer 1

anal triangle and urogenital triangle

Question 2

Boundaries of perineum

Answer 2

Symphysis, conjoint rami, ischial tuberosities, sacrotuberous ligaments, coccyx

Question 3

plane of urogenital triangle

Answer 3

horizontal

Question 4

Muscles forming the pelvic diaphragm

Answer 4

levator ani and coccygeous

Question 5

Midline fiber insertions for levator ani

Answer 5

perineal body and anococcygeal ligament

Question 6

Location of urogenital diaphram

Answer 6

between the conjoint rami

Question 7

Content of anal triangle

Answer 7

ischioanal fossae, ant. recesses, ext. anal sphincter, pudendal canal, inf rectal vessels and nerves

Question 8

Location of ischioanal fossa

Answer 8

from behind rectum superior along side both sides of urogenital diaphram

Question 9

Contents of pudendal canal

Answer 9

internal pudendal art and vein and pudendal nerve (S2,3,4)

Question 10

branches of pudendal nerve

Answer 10

inf rectal, deep and superficial (to scrotal) perineal, dorsal nerve of penis

Question 11

Divisions of urogenital triangle

Answer 11

deep and superficial pouch

Question 12

borders of deep pouch

Answer 12

super - no name

inf - perineal membrane

Question 13

contents of male deep pouch

Answer 13

external urethral sphincter, deep trans perineal muscles, membranous urethra, bulbourethral glands, dorsal nerves and vessels of penis, deep branches of perineal nerve

Question 14

contents of female deep pouch

Answer 14

membranous urethra, vagina, ext. urethral sphincter, dorsal nerves and vessels of clit, deep branches of pelvic nerve

Question 15

separation of deep and super pouch

Answer 15

perineal membrane

Question 16

borders of supererficial pouch

Answer 16

super - perineal membrane

inf - colle’s fascia

Question 17

attachments of colles fascia

Answer 17

post - perineal membrane
ant - scarpas
lat - conjoint rami

Question 18

contents of male superficial pouch

Answer 18

• components and muscles of penis
• super transverse perineal muscles
• post scrotal branches of pudendal nerve (sensory)
• internal pudendal art and veins
• super perineal branches of pudendal nerve

Question 19

attachment of corpus spongiosum

Answer 19

pernieal membrane

Question 20

ant and post end of corpus spongiosum

Answer 20

ant - glans

post - bulb of the penis

Question 21

muscles of penis (function)

Answer 21

bulbospngiosus - squeeze during urination

isciocavernosus - over crura

Question 22

bifurcation of corpus cavernosum

Answer 22

crus of corpus cavernosum

Question 23

Superficial innervation source of penis

Answer 23

S2,3,4 > pudendal > perineal branches

Question 24

Innervation for erections (source)

Answer 24

Para from S2,3,4 > nervi erigentes> hypogastric plexus (synapse) > cavernous nerves > vasodilation

Question 25

innervation for ejaculation (2)

Answer 25

• sym from T11-L2 > lumbar and sacral splanchnic > hypogastic plexus (synapse) > follow blood vessels to smooth muscles
• somatic from S2,3,4 > pudendal nerves > contraction of bulbospongiosus and ischiocavernosus

Question 26

tissue causing pressure for erection

Answer 26

corpus cavernosum trapped in tunica albugenia

Question 27

Contents of female superficial pouch

Answer 27

glans clit, crura of clit,

• bulb of vestibule
• ischiocavernosus and bulbospongiosus
• post. labial branches of pudendal and internal pudendal vessels
• super transverse perineal muscles
• bartholins glands
• superficial branch of pudendal nerve

Question 28

Muscles that attach to perineal body

Answer 28

Ext. anal sphincter
Levator ani
Superficial tranverse perineal