15 Thorax 2: intercostal spaces (VAN)

Question 1

VAN

Answer 1

Veins, arteries, nerves

superior –> inferior

Question 2

Subclavian arteries origination

Answer 2

Right subclavian artery
- brachiocephalic trunk (from aortic arch)

Left subclavian artery
- aortic arch

Question 3

Branching off subclavian arteries

Answer 3

Internal thoracic artery

Question 4

Internal thoracic artery origin and travel

Answer 4

• subclavian

- travels vertically on lateral aspect of sternum

Question 5

Internal thoracic artery supplies

Answer 5

intercostal spaces
pericardium
diaphragm

Question 6

Internal thoracic artery branches

Answer 6

*anterior intercostal arteries
pericardiophrenic arteries
musculophrenic artery
superior epigastric arteries

Question 7

Superior epigastric artery

Answer 7

Rises from Internal thoracic artery
continues vertically to supply anterior abdominal wall and costal diaphragm

joins with inferior epigastric artery

Question 8

Musculophrenic artery

Answer 8

Rises from internal thoracic art
Continues inferiorly and laterally
supplies diaphragm, intercostal and abdominal muscles

Question 9

Pericardiacophrenic Artery

Answer 9

Rises superior internal thoracic artery

Supplies pericardium

Question 10

Anterior intercostal artery

Answer 10

Rises “Internal thoracic artery”

• Travels between internal and innermost intercostal muscles
• AzMeets with posterior intercostal arteries

Question 11

Posterior intercostal artery

Answer 11

Rises Descending aorta

Meets with anterior intercostal arteries

Question 12

Arising from Descending / Thoracic Aorta

Answer 12

Posterior Intercostal Arteries
Bronchial Arteries (pleural cavities)
Esophageal Arteries
*Subcostal Artery*
- inferior to last rib

Question 13

Azygus Meaning?

Answer 13

“Not Paired”

Question 14

Azygus Vein

Answer 14

Feeds into Superior Vena Cava (*at the sternal angle)

Receives blood from:

• left and right intercostal veins (posterior)
• subcostal vein*

Travels vertical, posterior to the heart

Question 15

Venus blood supply location

Answer 15

Posterior thoracic cage

Question 16

Feeding into azygos vein?

Answer 16

Right side
- Posterior intercostal veins

Left Side

• Accessory hemiazygos vein (upper 1/2 of intercostal veins)
• Hemiazygos Vein (lower 1/2 AND subcostal vein)

Question 17

Accessory Hemiazygos Vein

Answer 17

Receives blood from “Upper 1/2 of Left intercostal veins”

Feeds into “Azygos Vein”

Question 18

Hemiazygos vein

Answer 18

Receives blood from “Lower 1/2 of Left intercostal veins and Subcostal Vein”

Feeds into “Azygos Vein”

Question 19

Intercostal nerves start

Answer 19

After BP

T2

Question 20

Intercostal nerves origin?

Answer 20

Anterior Ramus of spinal nerves

Question 21

Intercostal nerve extending infront of sternum?

Answer 21

Anterior cutaneous branch of intercostal nerve

Question 22

Branch of intercostal nerve connecting to posterior ramus of spinal nerve

Answer 22

Lateral cutaneous branch of intercostal nerve