Thoracic Athrology

Question 1

What are costal cartilages?

Answer 1

Connect the anterior portion of the ribs to the sternum
1st-7th (individually connect ribs to the sternum)
8th-10th (articulate with the costal cartilages superior to them before articulating with the sternum)

Question 2

What are the three types of joins?

Answer 2

Synovial joint (diathrosis; united by an articular capsule) 
Fibrous joint (synarthrosis; united by fibrous tissue) 
Cartilaginous joint (amphiarthrosis; united by hyaline cartilage or fibrous cartilage)

Question 3

Describe the manubriosternal joint

Answer 3

Symphysis joint between sternal angle of Louis and 2nd costal notch

Question 4

Describe the xiphisternal joint

Answer 4

Synchondrosis joint between inferior limit of the thorax and 7th costal notch

Question 5

What is the 1st sternocostal joint?

Answer 5

Synchondrosis joint of rib 1

Question 6

Describe the sternocostal joint of ribs 2-7

Answer 6

Synovial planar joint

Held together by anterior and posterior radiate sternocostal L

Question 7

Describe the costovertebral joint

Answer 7

Synovial planar
Contains the radiate L (rib to vertebral body) and intraarticular L (rib to the IV disc) + Articular capsule (strongest anteriorly as the radiate L)

Question 8

The head of each rib articulates with what?

Answer 8

The inferior costal facet of the superior numeric thoracic vertebral segment and the superior costal facet of the same numeric thoracic vertebral segment

Question 9

The articulating facet of the costal tubercle articulates with what?

Answer 9

The same numeric thoracic vertebral segment

Question 10

Describe the costotransverse joint

Answer 10

Synovial planar
Includes lateral costotransverse (tubercle of rib to TP) and superior costotransverse L (neck of rib to TP one vertebral segment superior)

Question 11

What are the two forms of movement that occur at the costovertebral joint?

Answer 11

Bucket handle and pump handle movement

Both function to increase the thoracic volume thereby decreasing thoracic pressure producing inspiration

Question 12

What is bucket handle movement?

Answer 12

Elevation of the lateral most portion of the rib increasing the transverse diameter of the thorax

Question 13

What is the pump handle movement?

Answer 13

Elevation of the sternal end of the rib increasing the anterior to posterior diameter of the thorax

Question 14

What is the costochondral joint?

Answer 14

Articulation between the ribs and costal cartilages

Synchondrosis joint

Question 15

Dislocation of the ribs refers to a dislocation at the what?

Answer 15

Sternocostal joint

Question 16

Separation of the ribs refers to a separation at the what?

Answer 16

Costochondral joint

Question 17

Describe the interchondral joint

Answer 17

Between 6-7th, 7-8th, 8-9th costal cartilages - Planar synovial
Between 9th and 10th it is a fibrous joint
Strengthened by the interchondral L