5. Vasculature of the thoracic wall and intercostal muscles

Question 1

Where do posterior intercostal arteries and anterior intercostal arteries come from?

Answer 1

Posterior intercostal arteries= descending thoracic aorta
Anterior intercostal arteries = internal thoracic artery (from subclavian)

Question 2

Where do anterior and posterior intercostal veins come from?

Answer 2

Anterior intercostal veins= from internal thoracic vein
Posterior intercostal veins= hemiazygous vein

Question 3

Answer 3

Question 4

What innervates the intercostal muscles?

Answer 4

intercostal nerves

Question 5

Where is the costal groove found?

Answer 5

Between the internal and innermost costal muscles

Question 6

What is the order in the costal groove?

Answer 6

V
A
N

Question 7

Where are chest drain needles inserted?

Answer 7

5th intercostal space in the mid axillary line at the nipple level under the intercostal nerve of the 5th rib on top of the 6th rib through parietal pleura