Thoracic Cage

Question 1

Sternalis muscle

Answer 1

A muscle Above the sternocostal head of the pectoralis major which is found in roughly 7% of population

Question 2

9 uppermost intercostal spaces is supplied by what artery

Answer 2

a pair of anterior intercostal(branches of internal thoracic artery, a branch of subclavian)and a single posterior intercostal

Question 3

2 lowermost intercostal spaces are supplied by what arteries

Answer 3

posterior intercostal arteries

Question 4

Posterior intercostal artery of the 1stand 2ndintercostal space arise from the

Answer 4

supreme (superior) intercostal artery

Question 5

The posterior intercostal artery Of the 3rd to 11th intercostal spaces (and subcostal space) arises posteriorly from

Answer 5

the aorta

Question 6

Internal thoracic artery (Internal mammary arteries)

Answer 6

*
Arise from inferior surfaces of subclavian
*
Descend into thorax posterior to the first clavicle and costal cartilage
*
Lateral to sternum and posterior to upper six costal cartilages

Question 7

At the 6th intercostal space, the internal thoracic artery branches into

Answer 7

musculophrenic and superior epigastric

Question 8

Anterior intercostal arteries of the 1stto 6thintercostal spaces are branches of the

Answer 8

internal thoracic artery

Question 9

7thto 9th anterior intercostal arteries are branches of

Answer 9

musculophrenic artery

Question 10

The posterior intercostal vein (4-11) ends up in the

Answer 10

azygos and hemiazygos system which drains into the superior vena cava

Question 11

The posterior intercostal vein of the first space drains into the

Answer 11

right and left brachiocephalic vein

Question 12

The posterior intercostal veins of the second and third intercostal spaces unite to form

Answer 12

superior intercostal vein

Question 13

The right superior intercostal vein is typically the final tributary of the?

Answer 13

azygos vein

Question 14

left superior intercostal vein empties into the

Answer 14

brachiocephalic vein

Question 15

Intercostal nerves are ______ of the first 11 thoracic spinal nerves

Answer 15

anterior rami

Question 16

Anterior ramus off the twelfth thoracic nerve lies in the

Answer 16

abdomen and runs forward in the abdominal wall as subcostal nerve

Question 17

Seventh to ninth intercostal nerves leave the anterior ends of the intercostal spaces by passing deep to the costal cartilage to enter the

Answer 17

anterior abdominal wall

Question 18

10thand 11thnerves pass ________ into the abdominal wall

Answer 18

directly