Occipito-Axial Joint Flashcards Preview

Spinal Anatomy I - Exam 3 > Occipito-Axial Joint > Flashcards

Flashcards in Occipito-Axial Joint Deck (31):
1

What is the classification of the occipto-axial joint?

fibrous (amphiarthrosis) syndesmosis

2

What name is given to the occipital-C2 region of the spine?

the craniovertebral junction

3

What lig are present at the occipito-axial joint?

- apical lig of the dens/apicodental lig
- alar lig
- membrana tectoria/tectorial membrane

4

What are the attachment sites for the apical dental lig of the dens or apicodental lig?

- anterior margin of the foramen magnum
- tip of the odontoid process of C2

5

What is the embryonic derivative to the apical lig of the dens or the apicodental lig?

the notochord

6

What is the function of the apical lig of the dens?

has no known function

7

What is the joint classification of the apical lig of the dens?

fibrous (amphiarthrosis) syndesmosis

8

Which lig lies behind the apical lig of the dens?

the cruciate lig, specifically the superior crus lig

9

What are the attachment sites for the alar lig?

- posterolateral part of the odontoid process of C2
- impressions on the medial border of the occipital condyle
- as far anterior as the anterolateral margin of the foramen magnum

10

What types of surfaces are identified as possible attachment sites for the alar lig?

both tubercles and fovea have been identified

11

What are the attachment sites for the anterior atlanto-dental lig?

- alar lig
- ipsilateral lateral mass of C1

12

What lig attaches the alar lig to the ipsilateral lateral mass of C1?

anterior atlanto-dental lig

13

What is the function of the alar lig?

together they function to resist axial rotation

14

What is the joint classification of the alar lig?

a fibrous (amphiarthrosis) syndesmosis

15

Which lig lies behind the alar lig?

the cruciate lig, specifically the superior crus lig

16

What forms the cranial continuation of the posterior longitudinal lig?

the membrana tectoria or tectorial membrane

17

What are the attachment sites for the membrana tectoria?

- posterior part of the inferior epiphyseal rim of C2
- vertebral body of C2
- anterior rim of the foramen magnum

18

What are the layers of the membrana tectoria?

- superficial layer
- deep layer

19

What are the attachment sites for the superficial layer of the membrana tectoria?

- posterior part of the inferior epiphyseal rim and vertebral body of C2
- capsular lig of the atlanto-occipital joint
- cranial dura of the posterior cranial fossa

20

What are the attachment sites for the deep layer of the membrana tectoria?

- posterior part of the inferior epiphyseal rim and vertebral body of C2
- periosteum behind the cruciate lig attachment site on the anterior rim of the foramen magnum

21

The superficial layer of the membrana tectoria lies in front of what structure?

the dura mater of the medulla oblongata and the spinal cord

22

What lies in front of the deep layer of the membrana tectoria?

the cruciate lig

23

What lig is anterior to the dura mater of the medulla oblongata-spinal cord junction?

membrana tectoria

24

What lig lies behind the cruciate lig?

membrana tectoria

25

What is the function of the membrana tectoria?

it resists flexion and extension of the skull on the upper cervical spine

26

What is the joint classification of the membrana tectoria?

a fibrous (amphiarthrosis) syndesmosis joint

27

List in order the lig in a midsagittal plane from the dura mater at the level of the medulla oblongata to the anterior bursa of the median atlanto-axial joint.

- membrana tectoria
- cruciate lig
- capsular lig of the posterior bursa of the median atlanto-axial joint
- apical lig of the dens

28

List in order the lig in a parasagittal plane from the dura mater at the level of the medulla oblongata to the anterior bursa of the median atlanto-axial joint.

- membrana tectoria
- cruciate lig
- capsular lig of the posterior bursa of the median atlanto-axial joint
- alar lig

29

For the cervical spine below C2, what is the range of flexion-extension?

about 90 degrees or about 18 degrees per couple

30

For the cervical spine below C2, what is the range of one side lateral bending?

about 50 degrees or about 10 degrees per couple

31

For the cervical spine below C2, what is the range of one side axial rotation?

about 33 degrees or about 6 degrees per couple

Decks in Spinal Anatomy I - Exam 3 Class (94):