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

Atypical Thoracic: T9 Flashcards

1
Q

What is the height pattern of the T9 vertebral body?

A

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

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2
Q

What joints are identified at the vertebral body of T9?

A
  • 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)
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3
Q

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

A
  • fibrous (amphiarthrosis) syndesmosis
  • cartilaginous (amphiarthrosis) symphysis
  • synovial plane (diarthrosis arthrodia)
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4
Q

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

A
  • superior and inferior epiphyseal rim to anterior longitudinal ligament
  • superior and inferior epiphyseal rim to posterior longitudinal ligament
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5
Q

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

A

superior and inferior epiphyseal rims to intervertebral disc

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6
Q

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

A
  • 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)
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7
Q

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

A

4

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8
Q

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

A

2

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9
Q

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

A

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

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10
Q

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

A

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

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11
Q

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

A

4

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12
Q

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

A
  • right and left superior costal demi-facets

- right and left inferior costal demi-facets

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13
Q

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

A

inferior costal demi-facets

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14
Q

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

A
  • 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
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15
Q

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

A

superior costal demi-facet

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16
Q

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

A

costocentral joint or ribs

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17
Q

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

A
  • 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
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18
Q

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

A
  • 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
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19
Q

What ligaments support the costocentral joint?

A
  • the costocentral stellate/radiate lig.

- costocentral interarticular or intra-articular lig.

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20
Q

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

A
  • vertebral body of T8

- vertebral body of T9

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21
Q

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

A

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

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22
Q

Which muscles will attach to the vertebral body of T9?

A

none

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23
Q

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

A

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

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24
Q

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

A

transverse tubercle

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25
Q

What is present on the transverse tubercle of T9?

A

transverse costal facet

26
Q

What is the rib-transverse process relationship for T9?

A

the 9th rib articulates with the T9 transverse process

27
Q

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

A

forward, outward, and upward

28
Q

What ligaments support the costotransverse joint of T9?

A
  • superior costotransverse lig.
  • inferior costotransverse lig.
  • lateral costotransverse lig.
29
Q

What lig. attach to the transverse process of T9?

A
  • intertransverse lig.
  • capsular costotransverse lig.
  • superior costotransverse lig.
  • inferior costotransverse lig.
  • lateral costotransverse lig.
30
Q

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

A

10th rib costotransverse joint

31
Q

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

A

transverse process of T8

32
Q

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

A

10th rib

33
Q

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

A

transverse process of T9

34
Q

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

A

9th rib

35
Q

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

A

transverse process of T9

36
Q

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

A

9th rib

37
Q

Which muscles attach to the transverse process of T9?

A
  • longissimus thoracis
  • semispinalis thoracis
  • multifidis
  • rotator longus
  • rotator brevis
  • intertransversarii
  • levator costarum longus
  • levator costarum brevis
38
Q

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

A

longissimus thoracis

39
Q

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

A

spinalis and iliocostalis muscles

40
Q

Which transversospinalis muscles attach to the transverse process of T9?

A
  • semispinalis thoracis
  • multifidis
  • rotator longus
  • rotator brevis
41
Q

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

A

backward, upward, and lateral (BUL)

42
Q

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

A

forward, downward, and medial (ForMeD)

43
Q

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

A

slightly convex

44
Q

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

A

slightly concave

45
Q

What is the joint classification of the articular facet joint?

A

synovial plane (diarthrosis arthrodia)

46
Q

How may synovial joints are typically present at T9?

A

10

47
Q

Identify the synovial joint surfaces typically present on T9.

A
  • two superior costal demi-facets
  • two inferior costal demi-facets
  • two superior articular facets
  • two inferior articular facets
  • two transverse costal facets
48
Q

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

A

6

49
Q

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

A
  • two superior costal demi-facets
  • two inferior costal demi-facets
  • two transverse costal facets
50
Q

Which rib related facet may be absent on T9?

A

inferior costal demi-facet

51
Q

What is the orientation of the spinous process of T9?

A

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

52
Q

What is the length of the spinous process of T9?

A

it will shorten significantly from the long spinous process of T8

53
Q

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

A

shorter and more horizontal

54
Q

What is the angulation of the spinous process of T9?

A

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

55
Q

What ligaments attach to the spinous process of T9?

A
  • interspinous lig.

- supraspinous lig.

56
Q

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

A

fibrous (amphiarthrosis) syndesmosis

57
Q

What muscles attach to the spinous process of T9?

A
  • trapezius
  • latissimus dorsi
  • multifidis
  • rotator longus
  • rotator brevis
  • interspinalis
58
Q

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

A
  • spinalis
  • longissimus
  • iliocostalis
59
Q

Which transversospinalis muscles attach to the spinous process of T9?

A
  • multifidis

- rotators

60
Q

Which muscles are conspicuously absent at the T9 spinous process?

A
  • spinalis

- semispinalis

61
Q

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

A
  • trapezius
  • latissimus dorsi
  • multifidis
  • rotator longus
  • rotator brevis

Spinal Anatomy I - Exam 2 (28 decks)

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