Final Exam Transition Zones Flashcards Preview

Spinal Anatomy Summer 2015 > Final Exam Transition Zones > Flashcards

Flashcards in Final Exam Transition Zones Deck (44)
1

What is another way of implying occipitalization of C1

Atlas assimilation

2

What is the incidence of occipitalization of C1

.1- .8%

3

When do the centers of ossification for the odontoid process first appear

During the last trimester in utero

4

What is the characteristic of occipitalization of C1

The atlas maybe partially or completely fused to the occiput

5

When do the bilateral ossification centers for odontoid process fuse

At or shortly after birth

6

What joint is formed between the odontoid process ossification centers in the Centrum of C2

The sub dental synchondrosis

7

What is the classification of the joint form between the C2 Odontoid process and centrum

Amphiarthrosis synchondrosis

8

Ossification between the odontoid process and Centrum joint of C2 first appears at what age

Four years old

9

A joint between odontoid process and Centrum of C2 his last identified at what age

Seven years old

10

What is the name given to the condition in which the joint form between odontoid process and Centrum of C2 persist beyond age 7

Os odontoideum

11

What is the name given to the joint between the odontoid process and Centrum of C2 which is still evident beyond age 7

Persistence subdental synchondrosis

12

What is the name given to the joint form between the tip of the dens and the odontoid process centers of ossification

Tip of the dens synchondrosis

13

What is this classification of the joint formed between the tip of the dens and odontoid process centers of ossification

Amphiarthrosis synchondrosis

14

At what age will the tip of the dens center of ossification appear

Sometime in early adolescence

15

Based on the age of appearance how was the tip of the dens center of ossification classified

Secondary center of ossification

16

At what age will the tip of the dens fuse with odontoid process

Before age 12

17

If the joint form between the tip of the dens and odontoid process centers of ossification persist beyond age 12 what is the condition called

Terminal ossicle

18

What are the transition zones of the vertebral column

Occipitocervical
cervicothoracic
Thoracolumbar
lumbosacral
Sacrococcygeal

19

What is the basilar impression

A persistence of the nonunion of the basilar and condylar parts of the chondrocranium such that the cartilage deforms due to the weight of the brain

19

What is basilar invagination

The upper cervical spine appears to be invaginate do into the skull on X-ray analysis

20

What is the incidence of rib related changes following dorsalization of C7

From one half to two and one half percent of the population

21

Do patients typically present with symptoms specific for dorsalization of C7

No, they are typically asypomtomatic

22

What is the gender bias suggested in dorsalization of C7

Female

23

What alteration in C7 facet orientation may accompany dorsalization

The superior articular facet of C7 may change from back, upward, and medial to that of a typical thoracic facet... Back, upward, lateral, the inferior articular facet is changed

24

What percent of the population may demonstrate thoracic like features at C7

Up to 46%

25

What T1 facet orientation changes may accompany cervicaliztion

The superior articular facet may change from back upward and lateral to back upward and medial the inferior articular facet is unchanged

26

What is the incidence of cervicalization of T1 in the population

Up to 28% of the population

27

What is the incidence of lumbar ribs in the population

Over 7% of the population demonstrates lumbar ribs

28

What L1 facet orientation changes may accompany dorsalization

The superior articular facet ,may change from concave, back upward and medial to back upward and lateral the inferior articular facet is unchanged

29

What is gender bias associated with dorsalization of L1

Males are two to three times more affected

30

What T12 facet orientation changes may accompany lumbarization

The superior articular facet may change from flat back upward and lateral to concave back upward and medial the inferior articular facet is unchanged

31

What T11 facet orientation changes may accompany lumbarization

The inferior articular facet may change from flat forward, medial, and downward to convex forward, lateral, and downward, the superior articular facet is unchanged

32

What is usual way of identifying the number of cervicals, thoracics, and lumber vertebrae during imaging studies

Identify the vertebrae with ribs, they will be thoracics, those higher are cervicals, and those lower are lumbars

33

What is characteristic of lumbarization of S1

The failure of synesthesia between S1 and S2, squaring of the vertebral body of S1 and flaring of the sacral ala

34

What is characteristic of sacralization of L5

L5 may be partially or completely fused to the sacrum

35

What is the incidence of sacralization of L5 in the population

41-85%

36

which segment demonstrates the greatest morphological variation along the spine

L5

37

what articular facet changes accompany sacralization of L5

none

38

what is the incidence of variation within the Sacrococcygeal region in the population

up to 14%

39

what is characteristic of sacralization of Co1

the premature fusion of Co1 to the sacrum

40

What is failure of synostosis between S1 and S2

The segments do not completely fuse together r

41

What is squaring of the vertebral body of S1

The S1 vertebral body has similar anterior and posterior heights, hence a lack of wedging

42

What is flaring of the sacral ala

Transverse process of the ala appears to elevate ad though separating from the rest of the sacral aka

43

What is characteristic of coccygeal of S5

The separation of S5 from sacrum and it's premature fusion to Co1

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