Abdominal Wall

Question 1

Order of 4 fascia layers from superficial to deep

Answer 1

1. Camper
2. Scarpa
3. Transversalis
4. Peritoneum

Question 2

Between which layers of fascia do the abdominal muscles lie

Answer 2

Between Scarpa and transversalis

Question 3

Fiber orientation of 3 lateral ab muscles

Answer 3

EO: Sexternal (down towards pocket)
IO: Titernal (up towards chest)
Transversus abdominis: Transverse (horizontal)

Question 4

External Oblique

Answer 4

Innervation: Lower thoracoabdo + sub costal (ant rami T7-T12)
Origin: Ribs 5-12
Insertion: Linea alba, pelvis
Function: ips lat flex, CONTRA ROT

Question 5

Internal Oblique

Answer 5

Innervation: Lower thoracoabdo n. + Subcostal n. + L1 (ant ram T7-L1)
Origin: Tho.Lum. Fascia, iliac crest, ant sup iliac spine
Insertion: inf rib 10-12, xiphoid, linea alba, pelvis
Function: ips lat flex, IPS ROT

Question 6

Transversus Abdominis

Answer 6

Innervation: Lower thoracoabdo + subcostal + L1 (T6-L1)
Origin: tho. Lumb. Fascia, costal cart rib 7-12
Insertion: linea alba, pubic crest
Function: stabilization, increase ab pressure

Question 7

Rectus Abdominis

Answer 7

Innervation: Lower abdominal + subcostal n. (T6-T12)
Origin: Pubic crest, Pubic symphysis
Insertion: cost cart rib 5-7 + xiphoid
Function: trunk flex, compress ab contents

Question 8

Dermatome for nipples

Answer 8

T4

Question 9

Dermatome for Xiphoid

Answer 9

T5

Question 10

Dermatome for umbilicus

Answer 10

T10

Question 11

What nerves make up the thoracoabdominal nerves

Answer 11

T7-T11 (extension of intercostal nerves)

Question 12

What 3 arteries supply abdominal wall

Answer 12

1. Superior epigastric
2. Inferior epigastric
3. Musculophrenic (lateral)

Question 13

What is it called when 2 arteries meet

Answer 13

Anastamosis

Question 14

Posts Minor

Answer 14

Origin: T12-L1
Insertion: Pubic Bone
Function: Lumbar Flex, ips lat flex

Question 15

Psoas Major

Answer 15

Origin: VB T12-L5
Insertion: n/a (becomes iliopsoas)
Function: lumb flex, Ips lat flex

Question 16

Iliacus

Answer 16

Origin: Iliac fossa
Insertion: n/a (becomes iliopsoas)
Function: lumbar flex, Ips lat flex

Question 17

Iliopsoas

Answer 17

Innervation: L1-L3
Origin: Iliacus + Psoas Major
Insertion: Lesser trochanter (femur)
Function: Hip flexor

Question 18

Quadratus Lumborum

Answer 18

Innervation: T12-L4
Origin: Rib 12 + TP L1-L5
Insertion: Iliac crest
Function: Lumbar ext, Ips lat flex

Question 19

Diaphragm Innervation

Answer 19

Phrenic n. (C3-C5)

Question 20

Levels of 3 hiatuses

Answer 20

Caval: T8
Esophageal: T10
Aortic: T12

(Count letters)

Question 21

Role of Lateral arcuate ligament

Answer 21

Outline QL

Question 22

Role of Medial Arcuate Ligament

Answer 22

Outline Psoas Major

Question 23

Role of Median Arcuate Ligament

Answer 23

Outline Aorta