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Anatomy: Block 4- Pelvis and Lower Extremity > Male Pelvis/Perineum > Flashcards

Male Pelvis/Perineum Flashcards

1
Q

What is the anatomical name for the anal triangle?

A

Ischioanal fossa

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2
Q

What is the membraneous layer of superficial perineal fascia in the urogenital triangle?

A

Colles’ fascia

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3
Q

What fascia invests the muscles of the perineum?

A

Investing or Gallaudet’s

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4
Q

What fascia layer continues onto the erectile tissue of the penis?

A

Buck’s

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5
Q

What muscle makes up the ventral most side of the penis?

A

Corpus spongiosum

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6
Q

The crura of the penis become what muscle more distally?

A

Corpora cavernosa

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7
Q

What are the boundaries of the superficial perineal pouch?

A

Superior-perineal membrane; Inferior- Colles’ fascia; lateral- ischiopubic rami

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8
Q

What are the contents of the male superficial perineal pouch?

A

Bulb of penis, crura of penis, ischiocavernosus mm., bulbospongiosus m., superficial transverse perineus mm., proximal part (bulb) of spongy urethra, deep and superficial perineal branches of internal pudendal vessels and pudendal n.

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9
Q

What is the thickened anterior border of the perineal membrane?

A

Transverse perineal ligament

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10
Q

What are the boundaries of the deep perineal pouch?

A

Superior- superior fasia of UG diaphragm; inferior- perineal membrane; lateral- inf. Portion of obturator internus m. w/ its fascia

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11
Q

What are the contents of the male deep perineal pouch?

A

Membranous (intermediate) part of urethra, external urethral sphincter m., deep transverse sphincter m., bulbourethral glands, deep perineal branches of the internal pudendal vessels and the pudendal n., dorsal a. and n. of penis

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12
Q

What makes up the urogenital diaphragm?

A

Superior fascia of urogenital diaphragm, sphincter urethrae m. and transverse perinei mm., bulbourethral glands (men), perineal membrane?

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13
Q

What spinal nerves make up the pudendal n?

A

S2, S3, S4

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14
Q

What are the branches of the pudendal n. within the pelvis/perineum?

A

Inferior rectal n., perineal (superficial and deep branches), dorsal nerve of penis (clitoris)

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15
Q

What supplies blood to the scrotum?

A

Posterior scrotal brs. of perineal a.; anterior scrotal branches of deep external pudendal a.; cremasteric a.

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16
Q

What nerves innervate the scrotum?

A

Genital br of genitofemoral n., anterior scrotal brs. Of ilioinguinal n., posterior scrotal branches of perineal branch of pudendal n., perineal brs. Of the posterior cutaneous n. of the thigh

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17
Q

What is the peritoneal space between the bladder and rectum in men?

A

Rectovesical pouch

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18
Q

What is the relationship of the ureter to the testicular vessels at the pelvic brim?

A

Ureters are more medial than the vessels

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19
Q

What are the three most common sites for kidney stones to lodge?

A

Uretopelvic junction, crossing iliac a./v., ureterovesical junction

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20
Q

Approximately what is the capacity of a full bladder?

A

500 mL

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21
Q

What muscle composes the walls of the bladder?

A

Detrusor m.

22
Q

What are the three sections of the male urethra?

A

Prostatic, membraous, penile (spongy)

23
Q

Into what specific area of the urethra does the prostate secrete?

A

Prostatic sinus

24
Q

Which openings are found on the seminal colliculus?

A

Prostatic utricle and openings of ejaculatory duct

25
Q

Through what does the seminal vesicle secrete into the urethra?

A

Ejactulatory duct

26
Q

What is the function of the paraurethral glands?

A

Secrete mucous in the urethra

27
Q

What empties into the ejactulatory duct?

A

Seminal vesicles and vas deferens

28
Q

What are the lobes of the prostate gland?

A

Anterior, Posterior, Median, 2 Lateral

29
Q

Which lobe of the prostate is fibromuscular?

A

Anterior lobe

30
Q

What is the most frequent site of prostatic cancer?

A

Posterior Lobe

31
Q

What is included in prostatic secretions?

A

Prostaglandins, citrates, acid phosphatase, PSA

32
Q

Which lobe is affected most by benign prostatic hypertrophy?

A

Median lobe

33
Q

What structure secretes most of semen’s volume?

A

Seminal vesicles

34
Q

What is the pathway of sperm out of the penis?

A

Seminiferous tubules–>efferent ductules–>vas deferens–> ampulla of vas deferens–> ejaculatory duct–> prostatic urethra–> spongy urethra–> fossa navicularis –> external urethral orifice

35
Q

What are the contents of the spermatic cord?

A

Vas deferens, testicular a., a. of vas deferens, cremasteric a., pampiniform venous plexus, autonomic nerve fibers, GVAs, genital branch of genitofemoral n., lymphatics

36
Q

What portion of the anal canal is derived from endoderm?

A

Upper 2/3

37
Q

What are the longitudinal folds of mucosa in upper 2/3 of anus containing terminal brs. Of superior rectal a. and v.

A

Anal columns

38
Q

What anal sphincter is under ANS control?

A

Internal

39
Q

What vessel supplies the corpus cavernosum m.?

A

Deep a. of penis

40
Q

What is the normal pathway of venous drainage from the prostate?

A

Prostatic venous plexus–> internal iliac v. –> common iliac v. –> inferior vena cava

41
Q

Through what vessels is it possible for venous drainage from the prostate to enter the internal vertebral venous plexus?

A

Lateral sacral vv.

42
Q

What is the most lateral of the neurovascular structures on the dorsum of the penis?

A

Dorsal n. of penis

43
Q

What ligament attaches to the apex of the bladder?

A

Median umbilical ligament

44
Q

What is the name of rectoprostatic fascia?

A

Denonvilliers’ fascia

45
Q

What seperates the median and posterior lobes of the prostate?

A

Ejaculatory duct

46
Q

What is the function of th builbourethral glands? What is their homolog in females?

A

Mucous secreting glands that help lubricate the urethra during sexual arousal; Vestibular glands

47
Q

What boundary seperates the Anal triangle from the UG triangle?

A

Imaginary line between ischial tuberosities

48
Q

In what fascial compartment does the pudendal n. course along the obturator internus m.?

A

Alcock’s canal

49
Q

Which two muscles tied into the perineal body are responsible for maintaining erections by clampin off veinous drainage?

A

Ischiocavernosus and bulbospongiosus mm.

50
Q

What are the three functions of the bulbospongiosus m?

A

Increase turgidity of the penis by pushing blood to distal end; Gets last drop of urine out; maintains erection

51
Q

What structures make up the root of the penis?

A

Bulb and crura of the penis

52
Q

To what are the crura of the penis/clitoris attached?

A

Ischiopubic rami

Anatomy: Block 4- Pelvis and Lower Extremity (6 decks)

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