Anterior Thoracic Wall

Question 1

True ribs

Answer 1

1 through 7

Question 2

False ribs

Answer 2

8, 9, 10

Question 3

represents the boundary between the neck and thorax

Answer 3

thoracic outlet

bounded by T1, rib 1, and manubrium

Question 4

Inferior Thoracic Aperture bounded by

Answer 4

body of T12, costal margin, xiphisternal joint

Question 5

Sternum- parts and ossification centers

Answer 5

Manubrium, Body, Xiphoid Process

6 separate ossification centers, most fuse around age 25

Question 6

Sternal Angle- name and type of joint

Answer 6

Manubriosternal Joint: symphysis

Question 7

what does Symphysis mean when talking about ribs

Answer 7

secondary cartilaginous joint; bones united by fibrocartilage

Question 8

Synchondrosis means what when talking about ribs

Answer 8

primary cartilaginous joint; bones united by hyaline cartilage – usually temporary and then converts to bone

Question 9

Sternal angle landmark: T4-T5 intervertebral disc what is here

Answer 9

attachment of 2nd rib:
	2nd intercostal space
	bifurcation of trachea
	boundary between inferior and superior mediastinum
	SVC enters pericardium
	superior border of pulmonary trunk

Question 10

what is at the level of t3 t4

Answer 10

SVC
aortic arch
trachea
esophagus

Question 11

what is at the level of t6 t7

Answer 11

pulmonary trunk
ascending aorta
descending aorta
right/left pulmonary artery
right/left main bronchus

Question 12

physical features of a typical rib

Answer 12

Head and neck
Tubercle
Body and angle
Costal cartilage
Costal groove
Facets for articulation with vertebrae

Question 13

Facets on the head of the rib articulate with the body of

Answer 13

corresponding vertebra, and the body of the vertebra above.

Question 14

A facet on the tubercle of the rib articulates with the

Answer 14

tip of corresponding transverse process.

Question 15

The intercostal space has muscles. name them superficial to deep

Answer 15

External Intercostal Muscles
Internal Intercostal Muscles
Innermost Intercostal Muscles

Question 16

where do the External intercostals muscles end?

Answer 16

at the costochondral junction (go from vertebrae to costochondral junction)

Question 17

External intercostals ________ ribs during forced inspiration

Answer 17

elevate

Question 18

Interchondral (anterior, medial) portions _________ the ribs during forced expiration

Answer 18

elevate

Question 19

Internal intercostal muscles are incomplete where

Answer 19

posteriorly, where they are replaced by the internal intercostal membrane

Question 20

The innermost intercostals are membranous where

Answer 20

both anteriorly and posteriorly.

Question 21

nuerovasculature in the ribs run through what space

Answer 21

space between internal and innermost muscles

Question 22

Anterior intercostal arteries are branches of the

Answer 22

internal thoracic segmentally and musculophrenic arteries when the internal thoracic splits

Question 23

dermatome at the level of the nipple

Answer 23

T4

Question 24

dermatome at the level of the belly button

Answer 24

T10

Question 25

What are the floating rib(s)

Answer 25

11 and 12