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Reproductive-Week 1/2 > Male Perineum > Flashcards

Male Perineum Flashcards

1
Q

The Bony pelvis encloses

A

pelvic cavity

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2
Q

What divides the bony pelvis into the “true” (surrounds the pelvic cavity) and “false” pelvis

A

Pelvic Inlet (or pelvic brim)

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3
Q

The Pelvic Inlet is also known as…

A

the Pelvic Brim

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4
Q

The floor of the pelvic cavity is called _______. It is covered by a muscular lining called _______. Below lies a diamond shaped region called ______.

A

Pelvic Outlet
Pelvic Diaphragm
Perineum

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5
Q

The perineum is divided into

A
  1. urogenital triangle (anteriorly)

2. Anal triangle (posteriorly)

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6
Q

contains much of the male external genital structures

A

urogenital triangle

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7
Q

contains anal canal and anus

A

Anal triangle

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8
Q

The penis is divided into ____ and ____ regions

A
  1. root

2. body

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9
Q

The portion of the penis located in the superficial perineal space attached to the perineal membrane; consists of crura and bulb

A

root

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10
Q

A part of root of the penis; erectile bodies attached to the ischiopubic rami

A

Crura

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11
Q

A part of root of the penis; expanded body of erectile tissue b/w the crura

A

Bulb

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12
Q

Each crus continues anteriorly and is now called _____ near pubic symphysis

A

corpus cavernosum

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13
Q

Two corpus cavernosum fuse and is called

A

corpora cavernosa

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14
Q

crura are covered by skeletal muscle called

A

ischiocavernosus muscle

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15
Q

bulb is covered by skeletal muscle called

A

bulbospongiosus muscle

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16
Q

Bulb continues anteriorly and is now called _____

A

corpus spongiosum

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17
Q

The body of penis consists of

A
  1. corpora cavernosa
  2. corpus spongiosum
  3. glans penis
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18
Q

Main erectile body of the penis

A

corpora cavernosa

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19
Q

Continuation of bulb; contains penile urethra and expands distally to form glans penis

A

corpus spongiosum

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20
Q

Expanded distal end of corpus spongiosum forming the HEAD of the penis; has corona and external urethral orifice

A

glans penis

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21
Q

Prominent margin of glans penis is _______.

Opening at the tip of the glans is ________.

A

corona; external urethral orifice

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22
Q

Double fold of skin that extends from the neck of penis and covers the glans

A

prepuce (foreskin)

  • this gets removed during circumcision
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23
Q

Median fold of skin from prepuce to glans near the urethral orifice is called

A

frenulum

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24
Q

a membranous layer deep to the skin that is continuous with Scapa’s fascia of the abdomen

A

Superficial (dartos) fascia

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25
Q

a strong membranous layer that surrounds the three corpora of the penis like a sheath but doesn’t extend into the glans

A

Deep Fascia (aka. Buck’s fascia)

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26
Q

Deep Fascia is aka

A

Buck’s fascia

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27
Q

Dense layer of connective tissue which surrounds each corpus cavernosum; deep to the DEEP (BUCK’S) FASCIA

A

Tunica albuginea

28
Q

Branches of what artery supply the deep penile structures?

A

internal pudendal artery

29
Q

arteries that course just beneath Buck’s fascia and supply superficial structures

A

Dorsal penile arteries

30
Q

arteries that supply the erectile tissue and are responsible for ENGORGEMENT of the corpora cavernosa during erection

A

Deep penile arteries

aka. cavernous arteries

31
Q

Deep penile arteries is aka

A

cavernous arteries

32
Q

Veins that drain venous blood from the skin of penis and superficial structures

A

superficial dorsal veins

33
Q

superficial dorsal veins drain into

A

femoral vein

34
Q

the erectile bodies are drained by a single vein called

A

deep dorsal vein

35
Q

deep dorsal vein joins

A

prostatic venous plexus

36
Q

Superficial structures of the perineum (skin of the penis and skin of the scrotum) drain into what lymph node?

A

inguinal lymph nodes

37
Q

Deeper structures of the perineum (erectile tissues within the penis) drain into what lymph node?

A

iliac nodes

38
Q

Lymph from the erectile tissues (deeper structures) follows the course of

A

venous drainage

39
Q

Lymph from the testes drains into

A

lumbar (aortic nodes)

40
Q

The primary nerve of the perineum; has 3 branches

A

Pudendal nerve

41
Q

3 main branches of pudendal nerve

A
  1. Inferior rectal (external anal sphincter)
  2. Perineal nerve (sensory nerve to posterior scrotum)
  3. Dorsal penile (sensory nerve to the penis)

“I Prefer Dog”

42
Q

The penis is innervated by sensory fibers from what branch of pudendal nerve?

A

Dorsal Penile Nerve

43
Q

Besides Dorsal Penile Nerve, what nerve from the inferior hypogastric plexus carry PARASYMPATHETIC nerves in to the penis and are responsible for erection?

A

Cavernous nerves

44
Q

Extension of pelvic splanchnic (parasympathetic) nerves

A

Cavernous nerves

45
Q

Nerves that cause dilation of the blood vessels (deep penile arteries) within the erectile tissues of the penis, resulting in ENGORGEMENT and ERECT

A

Cavernous nerves

46
Q

Deep fascia of abdomen has an outer fatty layer called _____ and an inner membranous layer called ________, which both continue into the perineum.

A

Camper’s fascia

Scarpa’s fascia

47
Q

Scarpa’s fascia in male continues on to the penis/scrotum and is now called

A

Darto’s fascia

48
Q

Darto’s fascia continues on to the perineum and is now called

A

Colles’ fascia

49
Q

A tough fibrous sheet that extends between the ischiopubic rami within the UROGENTIAL triangle deep to colles’ fascia; located b/w superficial and deep perineal space/pouch

A

perineal membrane

50
Q

forms a platform (floor) for the cavernous bodies (erectile tissues) and their associated muscles which become engorged during arousal

A

perineal membrane

51
Q

Ruptures of MEMBRANOUS urethra is almost always associated with

A

pelvic fractures

52
Q

Ruptures of MEMBRANOUS urethra can result in urine/blood extravasation in

A

DEEP perineal space

53
Q

Ruptures of SPONGY (BULBOUS) urethra is almost always associated with

A

straddle injuries

54
Q

Ruptures of SPONGY (BULBOUS) urethra can result in urine/blood extravasation in

A

SUPERFICIAL perineal space

55
Q

Superficial perineal space in the male contains root of the penis, hence contains

A
  1. bulbospongiosus muscles and bulb
  2. Ischiocavernosus muscles and crura
  3. superficial transverse perineal muscles
  4. pundendal nerve branches and internal pudandal vessels
56
Q

Deep perineal space in the male contains

A
  1. Membranous urethra and external urethral sphincter
  2. Bulbourethral glands (Cowper’s)
  3. pundendal nerve branches and internal pudandal artery
  4. Deep transverse perineal muscles
57
Q

The majority of the perineum in the male is innervated by

A

pudendal nerve

58
Q

Sensory innervation to more anterior portion of the perineum/scrotum is innervated by

A

ilioinguinal and genitofemoral nerves

59
Q

The pudendal nerve and internal pudendal artery traverse through

A

pudendal (Alcock’s) canal

60
Q

Erection is thought to be a (sympathetic/parasympathetic) response

A

Parasympathetic

61
Q

Parasympathetic stimulation via cavernous nerves from the pelvic splanchnics causes relaxation and dilation of ______ resulting in vascular engorgement and enlargement of erectile bodies

A

deep penile arteries

aka. cavernous arteries

62
Q

Muscles of erectile bodies are innervated by _______ to maintain the erection

A

pudendal nerve

63
Q

Emission is thought to be a (sympathetic/parasympathetic) response

A

Sympathetic

64
Q

During emission, semen is delivered to the prostatic urethra via sympathetic stimulation of

A

vas (ductus) deferens

65
Q

Ejaculation is thought to be a (sympathetic/parasympathetic/somatic) response

A

all three but mainly SOMATIC

66
Q

Roles of the Sympathetic nerves during Ejaculation

A
  • Symp: contract internal urethral sphincter (prevent retrograde ejaculation)
67
Q

Mnemonic for main phases of the sexual response

A

” Point Squeeze Shoot”

  1. Erection –> Para
  2. Emission –> Symp
  3. Ejaculation –> Somatic (all three though)

Reproductive-Week 1/2 (14 decks)

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