Thoracic Wall

Question 1

Thorax

Answer 1

upper part of the trunk located between the neck and the abdomen

Thoracic cage
12 thoracic vertebrae posteriorly
12 pairs of ribs, and their costal cartilages
Sternum

Question 2

thoracic vertebrae

Answer 2

Facets on their bodies for articulation of the heads of the ribs

Facets on the transverse processes for articulation with the rib tubercle

Question 3

Ribs

Answer 3

seven true ribs vertebrosternal
three pairs of false ribs vertebrocostal
two pairs of floating ribs vertebral

Question 4

ratio disc for thoracic vertebrae

Answer 4

1:5
disc: body height

Question 5

ratio disk for cervical vertebrae

Answer 5

2:5
disc: Body height

Question 6

ratio disc body height for lumbar spine

Answer 6

1:3
Disc : body height

Question 7

Costotransverse joint structure

Answer 7

Upper joints are convex and concave
Lower joints are planar

Said to account for spin (rotation)of ribs with the upper thoracic spine and slide (elevation and depression) of ribs within lower thoracic spine

Question 8

typical rib

Answer 8

Head with two articular facet

Neck
Tubercle
Body or shaft
Angle
Costal groove

Question 9

Costovertebral joint

Answer 9

Articulation of the head of the rib with the superior part of the body of the corresponding thoracic vertebra
the inferior part of the body of the vertebra above the intravertebral disc

synovial plane joint

radiate ligament

Intraarticular ligament

Question 10

radiate ligament

Answer 10

Thickening of the interior capsule surrounding the head of the rib, and the two bodies of the vertebra

Question 11

Intraarticular ligament

Answer 11

Attaches the head of the rib to the intravertebral disc

Question 12

Coastotransverse joint

Answer 12

articulation of a tubercle of the rib with the associated transverse process

Synovial plane joint

Supported by superiorly and laterally by the superior and lateral coastotransverse ligaments

Question 13

Costochondral joint

Answer 13

articulation with the sternal end of the ribs with the costal cartilage postal

Primary cartilaginous joints

Question 14

Sternocostal joints

Answer 14

Articulation of the costal cartilage is with the manubrium and sternum

First rib is primary cartilaginous joint
Second to 7th are synovial plane joints

Supported by anterior and posterior radiant sternocostal ligament

Question 15

inspiration

Answer 15

Requires up the volume of the thoracic cage be increased

Vertical - contraction of the diaphragm lowers diaphragm
Anterior posterior - pump handle movement of the ribs primarily 1 to 7
Transverse - bucket handle movement of the ribs primarily 8 to 10