Posterior Abdominal Wall Flashcards Preview

COM Anatomy, Biochemistry, OS > Posterior Abdominal Wall > Flashcards

Flashcards in Posterior Abdominal Wall Deck (52):
1

posterior abdominal wall muscles

posar maj, min, quadratus lumborum, iliacus

2

psoas major:

Prox att: T12-L5
Distal att: lesser trochanter via common tendon w/iliacus

innervation: L2,3,4 via lumbar plexus
actions: flexion at hip+unilateral sidebending

3

iliacus

prox: iliac fossa
distal: lesser trochanter via common tendion w/psoas mah

innervation: femoral n.

actions: flexion at the hip

4

Psoas minor

Prox att: T12-L1
Distal att: pectineal line on superior pubic ramus

innervation: L1 and L2

fixes the 12th rib during DEEP INSPIRATION
depresses 12 rib

assists in bilateral trunk extension, side bending

5

what's the big thing the psoas minor does during respiration?

it fixes the rib during deep inspiration

6

Quadratus Lumborum m.

prox att: iliac crest and iliolumbar ligament
distal att: medial, inferior aspect of 12 rib

innervation T12-L4

fixes rib during inspiration (compare to posas minor, which fixes the rib during DEEP inspiration)

7

Psoas Syndrome

pain in the lumbosacral region
Pain in the contralateral gluteal region
radiation of pain usually stopping at the knee
difficulty standing up straight
may mimic herniated disc

8

Differential diagnosis for psoas syndrome

appendicitis, colon cancer, hip dysfunction, diverticulitis

9

all the abdominal aorta arteries that branch off at T12

celiac trunk
inferior phrenic
middle and superior suprarenal

10

all the abdominal aorta arteries that branch off a L1

SMA
first lumbar
inferior supra renal
1/2 renal (L1/L2)

11

all the abdominal aorta arteries that branch off a L2

1/2 renal a., gonadal a. second lumbar a.

12

all the abdominal aorta arteries that branch off a L3

IMA, third lumbar

13

all the abdominal aorta arteries that branch off at L4

fourth lumbar a

14

all the abdominal aorta arteries that branch off a L5

bifurcation
r/l common iliac, r/l external iliacs, r/l internal iliacs, median sacral a.

15

respiratory diaphragm

borders

xiphisternal joint
costal margin
vertebral body T12
right and left domes are at T12, but superior surface can extend to rib 5

16

3 peripheral origins of diaphragm inset on the central tendon

1. sternal origin
2. costal origin
3. vertebral origin



17

Right and left crus of the diaphragm

MEET at the aortic hiatus

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right crus

longer, forms esophageal hiatus

19

left crus

shorter and more lateral

20

Caval opening is @

T8

21

T8: opening, and structures

caval opening, IVC, branches of right phrenic nerve, lymphatics from liver

22

T10: opening, and structures

Esophageal hiatus

esophagus, anterior/posterior vagal trunks, esophageal branches of left gastric a.

23

T12: opening, structures

aortic hiatus, aorta, thoracic duct
azygous vein

24

sternocostal hiatus

superior epigastric vessels

25

arcuate ligaments: name them

median, medial, lateral

26

arcuate ligaments form what posterior structures?

Median arcuate lig: aortic hiatus
medial arcuate lig: gap for psoas maj.
lateral arcuate lig: gap for quadratus lumborum

27

Parasternal hernias

sternocostal triangle
located between sternal and costal parts of diaphragm

28

Pleuroperitoneal hernias

lunbocostal triangle
located between 12 rib and diaphragm

29

this hernia occurs between the sternal and costal parts of the diaphragm

parasternal, in the sterncostal triangle

30

this hernia occurs between the 12th rib and the diaphragm

pleuroperitoneal hernias

31

congenital diaphragmatic hernia

failure of pleuroperitoneal membranes to fuse with other components of the diaphragm

32

Respiratory distress and cyanosis in the first minutes or hours of life

congenital diaphragmatic hernia
unusually flat abdomen

usually occurs within the first hour of life

33

Hiatal hernia

occurs through esophageal hiatus into mediastinum, 2 kinds: sliding and paraesophageal

34

Sliding hernia

abdominal esophagus, cardia, and fundus of the stomach slide superiorly into the thorax

some regurgitation of gastric content may occur

35

Paraesophageal hernia

cardia remains in position, but the fundus extends through the hiatus , usually no regurgitation.

36

Blood supply to diaphragm: superior surface

pericardiacophrenic A
musculophrenic A
superior phrenic A

37

Blood supply to diaphragm: inferior surface

inferior phrenic A
R: passes posterior to IVC
L: passes posterior to esophagus

38

Innervation of diaphragm: motor

MOTOR: C3,4,5 keeps the diaphragm alive- only motor innervation. some branches run with phrenic A

39

Innervation of diaphragm: sensory

the central tendon (central part)- phrenic n.
peripheral portion: intercostal n.

40

Lymphatics: basic reminder

thoracic duct drains 3/4 of body + left side of upper extremities

41

Lymphatics: superior surface

Anterior diaphragmatic nodes ---> parasternal nodes

42

Lymphatics: posterior surface

Posterior diaphragmatic nodes --> mediastinal nodes

43

Lymphatics: inferior surface

celiac nodes
superior lumbar nodes

44

where is the cisterna chyle?

behind (roughly) the superior mesenteric plexus

45

Lower Extremity, Perineum, Gluteal region: lymphatic must travel

through the abdomen ---> thoracic duct (L1/L2)

46

Body wall: lymphatics must travel

to the lumbar lymph trunks ---> thoracic duct (L1/L2)

47

GI tracts: lymphatics must travel

enters intestinal lymph trunks ---> thoracic duct (L1/L2)

48

celiac nodes --->

intestinal lymphatic trunk

49

lumbar nodes -->

intestinal lymphatic trunk

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superior mesenteric nodes -->

intestinal lymphatic trunk

51

inferior mesenteric nodes --->

intestinal lymphatic trunk

52

cisterna chyli

collects lymph from intestinal lymphatic trunk and lumbar lymphatic trunks