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S&F III: Exam 1 > Thoracic Wall > Flashcards

Flashcards in Thoracic Wall Deck (31):
0

Bones of Wall

Thoracic vertebrae, ribs, sternum

1

Intercostal Spaces

Intercostal spaces, muscles, neurovascular supply

2

Palpable structures of anterior wall

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

3

Which ribs aren't palpable?

Ribs 1, 11, 12

4

Sternal angle anatomical events

Rib 2 articulates w/ sternum

Intervertebral disc T4-T5

5

Costal margin

Made from costal cartilages 7-10

6

Site of nipple

Intercostal space 4 @ middle clavicular plane

7

True ribs

1-7, cartilage attaches to sternum

8

False ribs

Ribs 8-10. Attaches to cartilage of 7

9

Contents of intercostal space

1. 3 layers of muscle (external, internal, innermost)
2. Neurovascular supply (btwn internal and innermost)

10

External Intercostal muscles

Fibers directed inferiorly & medially (anterior thorax)

11

Internal intercostal muscles

Fibers inferiorly & laterally (ant thorax)

12

Innermost muscles group

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

13

External costal membrane

Replaces muscle near sternum or costal margin

14

Internal intercostal membrane

Replaces muscle at vertebral column

15

3 subgroups of Innermost muscle group

1. Innermost
2. Subcostalis
3. Transversus thoracis

16

Innermost muscle

Lateral thoracic wall, stay w/in 1 space

17

Subcostalis

Near vertebrae, spans 1-2 spaces

18

Transversus thoracis

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

19

Intercostal neurovascular bundle

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

20

Pleural tap (thoracentesis)

Inserted in midaxillary space in middle of 4th intercostal space

-removing fluid from pleural cavity

21

Posterior intercostal arteries

Branch of aorta

Supply muscles, fascia, skin

22

Anterior intercostal artery

Branch of internal thoracic artery

Supply muscles, fascia, skin

23

intercostal artery anastomoses

Ant. And post. anastomose at intercostal space

24

1st & 2nd posterior intercostal arteries

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

25

Musculophrenic artery

Terminal branch of internal thoracic artery

Supplies ant. Intercostal arteries to 7-9 and diaphragm

26

Superior epigastric artery

Terminal branch of internal thoracic artery

Supplies ant. Ab wall

27

Right posterior vein drains to?

Azygos vein --> superior vena cava

28

Left posterior veins drain to?

Hemiazygos vein
Accessory hemiazygous vein

29

Anterior veins drain to?

Internal thoracic vein and musculophrenic vein

30

Intercostal nerve

Ventral ramus of thoracic spinal nerve