Unit One Intercostal Spaces

Question 1

Thoracic wall components of posterior aspect

Answer 1

Twelve thoracic vertebrae, intervertebral discs

Question 2

Thoracic wall components of lateral aspect

Answer 2

Twelve ribs, three flat muscles (intercostal spaces), intercostal vein, artery and nerve

Question 3

Thoracic wall components anterior aspect

Answer 3

Sternum

Question 4

What are the muscles of the thoracic wall

Answer 4

External intercostal, internal intercostal, innermost intercostal, subcostales, transversus thoracis

Question 5

Function of muscles of the thoracic wall

Answer 5

Help maintain space between ribs

Question 6

External intercostal active during

Answer 6

Inspiration

Question 7

Internal intercostal active during

Answer 7

Expiration

Question 8

Innermost intercostal function

Answer 8

Help maintain space between ribs

Question 9

Subcostales muscle is on the same plane as

Answer 9

Innermost intercostalis muscle

Question 10

Subcostales muscle spans

Answer 10

Multiple ribs by skipping a rib

Question 11

Function of subcostales muscle

Answer 11

Pull down on ribs

Question 12

Subcostales muscle is located on

Answer 12

Posterior thoracic wall

Question 13

Transversus thoracis muscle comes off of the

Answer 13

Sternum

Question 14

Transversus thoracis muscle is on the same plane as

Answer 14

Innermost intercostals

Question 15

Transversus thoracis muscle secures what

Answer 15

Internal thoracic vessels to the wall

Question 16

actions of the intercostal muscles

Answer 16

Support intercostal spaces during breathing and pull ribs nearer to one another

Question 17

What are the contents in the intercostal spaces

Answer 17

External intercostal, internal intercostal, innermost intercostal, subcostales, transversus thoracis and intercostal vein, artery, and nerve

Question 18

What are the branches of the internal thoracic artery

Answer 18

Superior epigastric artery, musculophrenic artery, anterior intercostal arteries, pericardiophrenic artery, and mediastinal artery

Question 19

The superior epigastric artery enters the

Answer 19

Rectus sheath

Question 20

The superior epigastric artery supplies the

Answer 20

Rectus muscles to umbilicus

Question 21

Musculophrenic artery supplies the

Answer 21

Diaphragm

Question 22

the musculophrenic artery is the origin for what arteries

Answer 22

Lower anterior intercostal arteries

Question 23

The anterior intercostal arteries connects with

Answer 23

Posterior intercostal arteries

Question 24

The pericardiophrenic artery accompanies the

Answer 24

Phrenic nerve

Question 25

The pericardiophrenic artery supplies what

Answer 25

Pericardium and diaphragm

Question 26

The mediastinal artery supplies the

Answer 26

Anterior mediastinum (thymus)

Question 27

The internal thoracic vein drains into the

Answer 27

Brachiocephalic vein

Question 28

The intercostal arteries divide into

Answer 28

Anterior and posterior

Question 29

What are the anterior intercostal arteries

Answer 29

Internal thoracic and musculophrenic artery

Question 30

The internal thoracic artery is the origin for what ribs

Answer 30

1-6

Question 31

The musculophrenic artery is the origin for what ribs

Answer 31

7 to 10

Question 32

What are the posterior intercostal arteries

Answer 32

Subclavian artery and thoracic artery

Question 33

What trunk comes off the subclavian artery for the posterior intercostal arteries

Answer 33

Costocervical trunk

Question 34

The subclavian artery is the origin for

Answer 34

Superior two posterior intercostal arteries

Question 35

The thoracic aorta is located where

Answer 35

Left side of vertebral column

Question 36

The thoracic aorta is the origin for

Answer 36

Lower 9 posterior intercostal arteries

Question 37

What comes off the costocervical trunk

Answer 37

First 2 intercostal arteries that run posteriorly

Question 38

What are the anterior intercostal veins

Answer 38

Musculophrenic vein and internal thoracic vein

Question 39

The anterior intercostal veins drain into

Answer 39

Brachiocephalic veins

Question 40

Do the anterior intercostal veins drain into brachiocephalic vein on both sides, or right or left

Answer 40

Both sides

Question 41

What are the posterior intercostal veins

Answer 41

Azygous, hemiazygous and left brachiocephalic vein

Question 42

Azygous drains to what side and where

Answer 42

Right side and superior vena cava

Question 43

The hemiazygous vein drains on what side and where

Answer 43

Left side and azygous vein

Question 44

What is the upper posterior intercostal vein on the left side

Answer 44

Left superior intercostal vein

Question 45

What is the middle posterior intercostal vein on the left side

Answer 45

Accessory hemiazygous vein

Question 46

What is the lower posterior intercostal vein on the left side

Answer 46

Hemiazygous vein