2.1 - anatomy of the respiratory system (workbook)

Question 1

what are the intercostal muscles innervated by?

Answer 1

intercostal nerves

Question 2

when are internal and innermost intercostal muscles used?

Answer 2

during forced expiration as quiet expiration is passive

Question 3

what is the neurovascular bundle?

Answer 3

intercostal vein, artery, nerve (VAN)

Question 4

where is the neurovascular bundle found?

Answer 4

intercostal groove of rib - inferior section of superior rib of an IC space (lower border of rib)
between internal & innermost intercostal muscles

Question 5

what is important in carrying out a pleural aspiration or insertion of a chest drain?

Answer 5

needle should be inserted at the upper border of the inferior rib to avoid injury

Question 6

what do intercostal arteries supply?

Answer 6

the intercostal muscles, parietal pleura, overlying skin

Question 7

what does each intercostal space contain in terms of arteries?

Answer 7

anterior intercostal artery (except floating ribs)

which anastomose with posterior intercostal artery

Question 8

where do the anterior intercostal arteries arise from?

Answer 8

internal thoracic artery (branch of subclavian) & its continuation, musculophrenic artery

Question 9

where does the posterior intercostal arteries arise from?

Answer 9

aorta and the superior intercostal artery (from costo-cervical trunk)