Atypical Thoracic: T9 Flashcards Preview

Spinal Anatomy I - Exam 2 > Atypical Thoracic: T9 > Flashcards

Flashcards in Atypical Thoracic: T9 Deck (61):
1

What is the height pattern of the T9 vertebral body?

the posterior height is greater than the anterior height by one to two millimeters

2

What joints are identified at the vertebral body of T9?

- vertebral body to anterior longitudinal lig. at the epiphyseal rims
- vertebral body to posterior longitudinal lig. at the epiphyseal rims
- vertebral body to vertebral body via the intervertebral discs
- vertebral body to head of a rib (costocentral joint)

3

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

- fibrous (amphiarthrosis) syndesmosis
- cartilaginous (amphiarthrosis) symphysis
- synovial plane (diarthrosis arthrodia)

4

What are the examples of fibrous (amphiarthrosis) syndesmosis joints at the T9 vertebral body?

- superior and inferior epiphyseal rim to anterior longitudinal ligament
- superior and inferior epiphyseal rim to posterior longitudinal ligament

5

What are the examples of cartilaginous (amphiarthrosis) symphysis joints at the T9 vertebral body?

superior and inferior epiphyseal rims to intervertebral disc

6

What are the examples of synovial plane (diarthrosis arthrodia) joints at the T9 vertebral body?

- superior costal demi-facet to inferior articular surface of the rib head (left and right)
- inferior costal demi-facet to superior articular surface of the rib head (left and right)

7

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

4

8

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

2

9

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

typically 4 are identified (as many as 8 if the costocentral stellate/radiate lig. are included)

10

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

typically 10 (14 if the costocentral stellate/radiate lig. are included)

11

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

4

12

What synovial joint surfaces are present on the vertebral body of T9?

- right and left superior costal demi-facets
- right and left inferior costal demi-facets

13

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

inferior costal demi-facets

14

What is the relationship between the vertebral body surface and the rib head/capitulum surface for the costocentral joint of T9?

- the superior costal demi-facets of T9 will joint with the inferior articular surfaces on the head of the ninth rib
- the inferior costal demi-facets of T9 will joint with the superior articular surfaces on the head of the tenth rib

15

Which of the demi-facets on the vertebral body of T9 is larger?

superior costal demi-facet

16

What feature will provide assistance in maintaining the stability of the intervertebral foramen at T9?

costocentral joint or ribs

17

What is the rib-vertebral body combination at the intervertebral foramen at T9?

- the inferior costal demi-facets of T8 will joint with the superior articular surfaces on the head of the ninth rib
- the superior costal demi-facets of T9 will joint with the inferior articular surfaces on the head of the ninth rib

18

Which rib-vertebral body combination is typically present at the intervertebral foramen for the ninth thoracic nerve?

- the inferior costal demi-facets of T9 will joint with the superior articular surfaces on the head of the tenth rib
- the superior costal demi-facets of T10 will joint with the inferior articular surfaces on the head of the tenth rib

19

What ligaments support the costocentral joint?

- the costocentral stellate/radiate lig.
- costocentral interarticular or intra-articular lig.

20

The costocentral stellate/radiate lig. will attach to which segments at the T8 spinal nerve intervertebral foramen?

- vertebral body of T8
- vertebral body of T9

21

What is the size relationship between the articulating surface on the head of the rib and costal demi-facet surface?

the rib surface is greater than the costal demi-facet surface

22

Which muscles will attach to the vertebral body of T9?

none

23

What is the position and direction of the pedicle from the vertebral body at T9?

the pedicle arises from the upper third of the vertebral body and projects posterior and slightly laterally

24

What is present at the tip of the transverse process of T9?

transverse tubercle

25

What is present on the transverse tubercle of T9?

transverse costal facet

26

What is the rib-transverse process relationship for T9?

the 9th rib articulates with the T9 transverse process

27

What is the orientation of the transverse costal facets for T9?

forward, outward, and upward

28

What ligaments support the costotransverse joint of T9?

- superior costotransverse lig.
- inferior costotransverse lig.
- lateral costotransverse lig.

29

What lig. attach to the transverse process of T9?

- intertransverse lig.
- capsular costotransverse lig.
- superior costotransverse lig.
- inferior costotransverse lig.
- lateral costotransverse lig.

30

Which costotransverse joint will the superior costotransverse lig. of T9 support?

10th rib costotransverse joint

31

The superior costotransverse lig. of rib 9 will attach to which segmental bony feature?

transverse process of T8

32

The superior costotransverse lig. of the transverse process of T9 will attach to which rib?

10th rib

33

The inferior costotransverse lig. of rib 9 will attach to which segmental bony feature?

transverse process of T9

34

The inferior costotransverse lig. of the transverse process of T9 will attach to which rib?

9th rib

35

The lateral costotransverse lig. of rib 9 will attach to which segmental bony feature?

transverse process of T9

36

The lateral costotransverse lig. of the transverse process of T9 will attach to which rib?

9th rib

37

Which muscles attach to the transverse process of T9?

- longissimus thoracis
- semispinalis thoracis
- multifidis
- rotator longus
- rotator brevis
- intertransversarii
- levator costarum longus
- levator costarum brevis

38

Which erector spinae muscle attaches to the transverse process of T9?

longissimus thoracis

39

Which erector spinae muscles will not attache to the transverse process of T9?

spinalis and iliocostalis muscles

40

Which transversospinalis muscles attach to the transverse process of T9?

- semispinalis thoracis
- multifidis
- rotator longus
- rotator brevis

41

What is the orientation of the superior articular facets of T9?

backward, upward, and lateral (BUL)

42

What is the orientation of the inferior articular facets of T9?

forward, downward, and medial (ForMeD)

43

What is the curvature of the superior articular facets of T9?

slightly convex

44

What is the curvature of the inferior articular facets of T9?

slightly concave

45

What is the joint classification of the articular facet joint?

synovial plane (diarthrosis arthrodia)

46

How may synovial joints are typically present at T9?

10

47

Identify the synovial joint surfaces typically present on T9.

- two superior costal demi-facets
- two inferior costal demi-facets
- two superior articular facets
- two inferior articular facets
- two transverse costal facets

48

How many synovial joint surfaces for ribs are typically present on T9?

6

49

Identify the synovial joint surfaces for ribs that are typically present on T9.

- two superior costal demi-facets
- two inferior costal demi-facets
- two transverse costal facets

50

Which rib related facet may be absent on T9?

inferior costal demi-facet

51

What is the orientation of the spinous process of T9?

posterior and slightly inferior, it will shorten and become more horizontal

52

What is the length of the spinous process of T9?

it will shorten significantly from the long spinous process of T8

53

What is the generic appearance of the spinous process of T9?

shorter and more horizontal

54

What is the angulation of the spinous process of T9?

the undersurface of T9 spinous processes will angle less than 40 degrees from the horizontal plane

55

What ligaments attach to the spinous process of T9?

- interspinous lig.
- supraspinous lig.

56

What joint classification is associated with lig. attaching to the T9 spinous process?

fibrous (amphiarthrosis) syndesmosis

57

What muscles attach to the spinous process of T9?

- trapezius
- latissimus dorsi
- multifidis
- rotator longus
- rotator brevis
- interspinalis

58

Which erector spinae muscles will not attach to the spinous process of T9?

- spinalis
- longissimus
- iliocostalis

59

Which transversospinalis muscles attach to the spinous process of T9?

- multifidis
- rotators

60

Which muscles are conspicuously absent at the T9 spinous process?

- spinalis
- semispinalis

61

Which of the muscles of the 5 layers of the true back are present at the T9 spinous process?

- trapezius
- latissimus dorsi
- multifidis
- rotator longus
- rotator brevis