Structure and Compartmentation - Pelvis and Perineum III Flashcards Preview

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Flashcards in Structure and Compartmentation - Pelvis and Perineum III Deck (60)
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1

pelvic vasculature

internal iliac artery
-branch from common iliac artery

divides at upper border of piriformis
-posterior trunk
-anterior trunk

2

posterior trunk of internal iliac

iliolumbar artery
lateral sacral artery
superior gluteal artery

3

iliolumbar artery

first branch of posterior trunk internal iliac a

lumbar branch - psoas and quadratus lumborum
iliac branch - to iliacus m.

4

lateral sacral artery

branch of posterior trunk internal iliac artery

2 from one trunk:
-1st enter first anterior sacral foramen
-to vertebral canal and skin/muscles of dorsal sacrum
-anastomose with superior gluteal

-2nd descends sacrum
-medial to anterior foraminae
-branches similar to first

5

superior gluteal artery

continuation of posterior trunk of internal iliac

leaves pelvis - greater sciatic foramen
-exits above piriformis

6

inferior gluteal artery

may be termination of posterior trunk internal iliac but usually terminal branch of anterior trunk

exits greater sciatic foramen below piriformis

7

anterior trunk of internal iliac artery

arises along lateral pelvic wall lateral to pelvic plexus

typically give rise to all pelvic visceral branches

very variable**
-rely on where they go

8

branches of anterior trunk

umbilical artery
middle rectal artery
inferior rectal artery
obturator artery
internal pudendal artery
superior vesicle artery
vaginal artery (F)
inferior vesicle artery (M)
middle vesicle artery
inferior gluteal artery

9

middle sacral artery

arises from aorta along surface of sacrum
-small communicating branches to lateral sacral arteries

10

superior rectal artery

branch of inferior mesenteric artery
-to posterior wall of rectum

11

internal iliac vein

tributaries roughly follow arteries

12

iliolumbar vein

companion of lumbar branch of iliolumbar artery

formation of ascending lumbar vein in abdominal region

13

anastomotic venous connections

link:
visceral pelvis plexus
bony pelvic plexus
spinal venous plexus

possible routes of transmission - infections and metastatic cells

14

cruciate collateral circulation

ovarian artery with uterine artery

in females

important if ligate during surgery

15

innervation of pelvis

lumbar plexus
sacral plexus

16

lumbar plexus

ventral rami - T12-L5

in substances of psoas major m.

linked superiorly to T12 and L1

lumbosacral trunk - ventral rami L4,5
-contribute to lumbosacral plexus

17

sacral plexus

ventral rami S1,2,3
joined by lumbosacral trunk

forms within pelvis - anterior surface sacrum and lateral borders of sacrum

18

lumbosacral trunk

ventral rami L4,5

19

5 major nerves from lumbosacral plexus

anterior division:
obturator n.
tibial n. (medial and lateral plantar nn.)

posterior division:
femoral n.
common fibular n.

20

sciatic nerve

largest nerve to exit plexus
-bundle of tibial and common fibular nerve**

21

femoral nerve

posterior division of lumbar plexus

22

obturator nerve

anterior division of lumbar plexus

23

common fibular nerve

posterior division of sacral plexus

24

tibial nerve

anterior division of sacral plexus

25

both division of lumbar plexus

leaves pelvis on anterior aspect of thigh and posteriorly entering buttocks

26

lumbar plexus

sacral and lumbar plexus

27

anterior division of both plexuses

supply original flexor muscles

28

posterior division of both plexues

supply original extensor muscles

29

obturator nerve

L2-4

30

iliohypogastric nerve

L1