Posterior Abdominal Wall Musculature and Lymphatics

Question 1

What is the action of the Psoas major and what is it innerveated by?

Answer 1

action: flexes thigh at hip, with feet fixed it flexes trunk on thigh; acting unilaterally side-bends trunk to same side
innervation: L2, L3, L4 via lumbar plexus

Question 2

What is the action of the psoas minor and what is it innervated by?

Answer 2

aciton: assists in extension and flexion of trunk; acting unilaterally side-bends trunk to same side
innervation: L1, (L2)

Question 3

What is the action of the Quadratus lumborm and what is it innervated by?

Answer 3

action: extends and laterally flexes vertebral column; fixes rib 12 during inspiration
innervation: T12-L4

Question 4

Iliacus - action and innervation

Answer 4

action: flexes thigh at hip; with lower limb fixed, flexes pelvis on thigh
innervation: femoral n. (L2, L3, and L4)

Question 5

How far does the superior surface of the diaphragm reach?

Answer 5

5th rib

Question 6

What are the boundaries of the diaphragm?

Answer 6

xiphisternal joint, costal margin, body of TV12

Question 7

What are the three peripheral origins of the diaphragm?

Answer 7

sternal, costal, and lumbar

Question 8

Comparing the left and right crus, which one is short and which one is long?

Answer 8

right crus: long

left crus: short

Question 9

Where is the median arcuate ligament?

Answer 9

over aorta

Question 10

Where are the medial arcuate ligaments?

Answer 10

over psoas major

Question 11

Where are the lateral arcuate ligaments?

Answer 11

over quadratus lumborum

Question 12

The aortic hiatus is at what vertebra?

Answer 12

T12

Question 13

The esophageal hiatus is at what vertebra?

Answer 13

T10

Question 14

The vena cabal foramen is at what vertebra?

Answer 14

T8

Question 15

pericardiacophrenic, musculphrenic, superior phrenic aa. are vessels on what surface of the diaphragm?

Answer 15

superior surface

Question 16

What vessels are on the inferior surface of the diaphragm?

Answer 16

inferior phrenic aa. & vv.

Question 17

What is the only motor nerve of the diaphragm?

Answer 17

Phrenic n. C3, C4, C5

Question 18

What are the sensory nerves of the diaphragm?

Answer 18

phrenic n. (central) , intercostal nn. (peripheral)

Question 19

Does the diaphragm have both parietal and visceral lymphatics?

Answer 19

yes

Question 20

Subcostal (T12), Iliohypogastric (T12), Ilioinguinal (L1), lateral cutaneous nerve of thigh (L2, 3), genitofemoral nerve (L1,2) and femoral nerve (L2-4) are all nerves in what area?

Answer 20

posterior abdominal wall

Question 21

At what vertebra does the aortic bifurcation occur at?

Answer 21

L4

Question 22

What are the arteries of the urogenital system from the abdominal aorta?

Answer 22

suprarenal superior middle, right renal, left renal, left gonadal

Question 23

inferior phrenic, lumbar, and subcostal arteries are from the abdominal aorta and are part of what area?

Answer 23

abdominal wall/diaphragm

Question 24

The celiac a., superior mesenteric a., and inferior mesenteric a. are arteries from the abdominal aorta that supply what?

Answer 24

gut

Question 25

What two pathways does sympathetic innervation of gut involve?

Answer 25

splanchnic and suprarenal

Question 26

What are the components of the renal system?

Answer 26

kidneys, suprarenal glands, urinary bladder, urethra

Question 27

List the path that urine travels after secretion

Answer 27

urine runs from renal papillae to minor calyses, to major calyses to the renal pelvis and finally the ureter