Pelvis + perineum Flashcards Preview

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Flashcards in Pelvis + perineum Deck (23):
1

describe the perineal triangle

Lateral: ischiopubic ramus

Base (posterior): line between the ischial tuberosities

Apex (anterior): pubic symphysis

Roof: levator ani

2

crus of clitoris = ....

corpus cavernosum

3

what covers the crus of clitoris

ishiocavernosus muscle

4

bulbospongiosus muscle covers...

bulb of the vestibule (vestibule = vaginal opening)

5

describe Colle's fascia attachments

  • attaches to the free edge of the perineum membrane
  • attaches to ischiopubic ramus
  • attaches to inguinal ligament

6

labia majora in females = ____ in males

scrotum

7

the labia majorum overlies _____

the bulb of the vestibule

8

describe the labia minorum

remnant of the urogenital folds

9

describe episiotomy

  • childbirth can make a tear in te perineal body
  • an oblique cut through the bulbospongiosus and superficial transverse perineal muscles may help prevent excessive damage

10

Q image thumb

A image thumb
11

describe the corpus spongiosum

contains the urethra along its entire length

12

contraction of which 2 muscles assist in expulsion of semen

1. ischiocavernosus muscles

2. bulbospongiosus muscles

13

describe the deep perineal fascia (Buck's fascia)

  • encloses all 3 bodies (2 corpus cavernosa + corpus spongiosum = erectile tissue)
  • Buck's fascia also creates a septum dividing the cavernosum from the spongiosum
  • contains deep dorsal vein and dorsal artery and nerve

14

the corpora cavernosa are surrounded by a continuous thick layer of fascia called _____

tunica albuginea

15

describe urethral injury where Buck's fascia is not injured

Extravasation is limited to the penis (deep to Buck's

16

describe urethral injury where Buck's fascia is injured

Extravasation will extend into the superficial perineal pouch

17

descibe venous drainage of the penis and clitoris

  • via the deep dorsal vein
    • males: prostatic plexus
    • females: vesicular plexus

18

describe the path of the posterior scrotal and posterior labial

  • become the internal pudendal vein
    • receives branches from the external anal sphincter

19

anterior scortum and labia majora drain into ___

external pudendal vein

20

describe the autonomic innervation of the perineum

  • sympathetic fibers from the saral symp. chain runs in the pudendal nerve and supplies the skin along its distribution
  • parasympathetic fibers from the pelvic spalnchnic nerves (S2-4) to the erectile tissues travel the prostatic plexus and run to the erectile tissues at the cavernous nerves

21

the lymphatic drainage of the glans of the clitoris and the penis (as well as the labia minora) goes to ___

deep inguinal

22

lymphatics from the perineal skin drain into the ____

superficial inguinal lymph nodes (horizontal)

23

describe Alcock's canal

passage within the obturator fascia where the internal pudendal vessels and pudendal nerve run from the lesser sciatic notch to the perineum

pudendal nerve and internal pudendal artery pass out the greater and in the lesser sciatic notch