I. Atypical Thoracic: T9

Question 1

What joint classifications are identified at the vertebral body of T9?

Answer 1

fibrous (amphiarthrosis) syndesmosis, cartilaginous (amphiarthrosis) symphysis and synovial plane (diarthrosis arthrodia)

Question 2

How many synovial joints are formed at the vertebral body of T9?

Answer 2

four

Question 3

How many symphysis joints are formed with the vertebral body of T9?

Answer 3

two

Question 4

How many syndesmosis joints are formed at the vertebral body of T9?

Answer 4

typically four are identified (as many as eight if the costocentral stellate/radiate ligaments are included)

Question 5

Which synovial joint surfaces may be absent from the vertebral body of T9?

Answer 5

inferior costal demi-facets

Question 6

What ligaments attach to the transverse process of T9?

Answer 6

intertransverse, capsular costotransverse, superior costatransverse, inferior costotransverse and lateral costotransverse ligaments

Question 7

The superior costotransverse ligament of T9 will attach to which rib?

Answer 7

the tenth rib

Question 8

Which muscles attach to the transverse process of T9?

Answer 8

the longissimus thoracis, semispinalis thoracis, multifidis, rotator longus, rotator brevis, intertransversarii, levator costarum longus, levator costarum brevis

Question 9

Which is the last thoracic vertebra to have an inferior costal demi-facet?

Answer 9

T9

Question 10

What muscles attach to the spinous process of T9?

Answer 10

the trapezius, latissimus dorsi, multifidis, rotator longus, rotator brevis, and interspinalis

Question 11

Which muscles are conspicuously absent at the T9 spinous process?

Answer 11

spinalis and semispinalis