Thoracic Wall

Question 0

Intercostal Spaces

Answer 0

Intercostal spaces, muscles, neurovascular supply

Question 1

Bones of Wall

Answer 1

Thoracic vertebrae, ribs, sternum

Question 2

Palpable structures of anterior wall

Answer 2

Suprasternal notch, manubrium, sternal angle, body of sternum, costal cartilage, xiphoid processes

Question 3

Which ribs aren’t palpable?

Answer 3

Ribs 1, 11, 12

Question 4

Sternal angle anatomical events

Answer 4

Rib 2 articulates w/ sternum

Intervertebral disc T4-T5

Question 5

Costal margin

Answer 5

Made from costal cartilages 7-10

Question 6

Site of nipple

Answer 6

Intercostal space 4 @ middle clavicular plane

Question 7

True ribs

Answer 7

1-7, cartilage attaches to sternum

Question 8

False ribs

Answer 8

Ribs 8-10. Attaches to cartilage of 7

Question 9

Contents of intercostal space

Answer 9

1. 3 layers of muscle (external, internal, innermost)

2. Neurovascular supply (btwn internal and innermost)

Question 10

External Intercostal muscles

Answer 10

Fibers directed inferiorly & medially (anterior thorax)

Question 11

Internal intercostal muscles

Answer 11

Fibers inferiorly & laterally (ant thorax)

Question 12

Innermost muscles group

Answer 12

Discontinuous group of 3 muscles directed inferiorly and laterally (ant thorax)

Question 13

External costal membrane

Answer 13

Replaces muscle near sternum or costal margin

Question 14

Internal intercostal membrane

Answer 14

Replaces muscle at vertebral column

Question 15

3 subgroups of Innermost muscle group

Answer 15

1. Innermost
2. Subcostalis
3. Transversus thoracis

Question 16

Innermost muscle

Answer 16

Lateral thoracic wall, stay w/in 1 space

Question 17

Subcostalis

Answer 17

Near vertebrae, spans 1-2 spaces

Question 18

Transversus thoracis

Answer 18

Near sternum, span 1-2 spaces, DEEP to internal thoracic vessels

Question 19

Intercostal neurovascular bundle

Answer 19

1. Btwn internal & innermost muscles
2. @inferior border of rib (costal groove)
3. V,A,N

Question 20

Pleural tap (thoracentesis)

Answer 20

Inserted in midaxillary space in middle of 4th intercostal space

-removing fluid from pleural cavity

Question 21

Posterior intercostal arteries

Answer 21

Branch of aorta

Supply muscles, fascia, skin

Question 22

Anterior intercostal artery

Answer 22

Branch of internal thoracic artery

Supply muscles, fascia, skin

Question 23

intercostal artery anastomoses

Answer 23

Ant. And post. anastomose at intercostal space

Question 24

1st & 2nd posterior intercostal arteries

Answer 24

Branch of Superior intercostal a. Branch of costocervical trunk of subclavian

Question 25

Musculophrenic artery

Answer 25

Terminal branch of internal thoracic artery

Supplies ant. Intercostal arteries to 7-9 and diaphragm

Question 26

Superior epigastric artery

Answer 26

Terminal branch of internal thoracic artery

Supplies ant. Ab wall

Question 27

Right posterior vein drains to?

Answer 27

Azygos vein –> superior vena cava

Question 28

Left posterior veins drain to?

Answer 28

Hemiazygos vein

Accessory hemiazygous vein

Question 29

Anterior veins drain to?

Answer 29

Internal thoracic vein and musculophrenic vein

Question 30

Intercostal nerve

Answer 30

Ventral ramus of thoracic spinal nerve