Neurovasculature Stuctures of Thoracic Wall Flashcards
Where do the first 6 intercostal aa branch from
internal thoracic artery
Where do the VAN lie
partially under he cover of the costal groove of the upper rib
Where do the lower intercostal aa (7-9) branch from
musculophrenic a
Which direction does the main branch of the intercostal aa travel and which direction does the collateral branch travel
Main: inferior surface of rib in costal groove
Collateral: superior surface of next adjacent inferior rib
Where do the 1st and 2nd posterior intercostal aa branch from
superior intercostal a
Where do the lower posterior intercostal aa branch from
directly from descending thoracic aorta
What is supplied by the dorsal branch of the posterior intercostal aa
vertebral column, back musculature, skin
Where do the anterior intercostal vv drain to
forward to musculophrenic vv or internal thoracic vv
Where do the posterior intercostal drain to
drain backward to the azygos system of vv
What does the internal thoracic artery branch from
subclavian artery
What are the branches of the internal thoracic artery
pericardiophrenic a
anterior intercostal aa
What level does the internal thoracic artery terminate at and what does it terminate as
Terminates at 6th intercostal space
musculophrenic a
superior epigastric a
What parts of the body drain to the azygos system of veins
back
thoracoabdominal walls
mediastinal viscera
What is different about the azygos system
the veins are valveless
What vertebral level does the azygos v span
T4-T12
Where does the azygos vein drain to
superior vena cava
What vessels does the azygos vein receive blood from
4th-11th posterior intercostal vv on RIGHT side
Where is the Hemiazygos vein located
posterior mediastinum of left side from T9-T12
How does the hemiazygos vein drain
Crosses over at T9 and drains into the azygos
What vessels drain into the hemiazygos vein
9th-11th posterior intercostal vv on left side
Where is the accessory hemiazygos vein located
posterior mediastinum of left side from T5-T8
How does the accessory hemiazygos vein drain
Crosses over at T8 and drains into the azygos vein
Where does the accessory azygos vein receive blood from
4th-8th posterior intercostal vv
How is the superior intercostal vv formed
1st-3rd posterior intercostal vv
