Occipito-Axial Joint

Question 1

What ligaments are present at the occipito-axial joint?

Answer 1

the apical ligament of the dens/apicodental ligament, alar ligament and membrana tectoria/tectorial membrane

Question 2

What is the embryonic derivative of the apical ligament of the dens or the apicodental ligament?

Answer 2

notochord

Question 3

What are the attachment sites for the superifical layer of the membrana tectoria or tectorial membrane?

Answer 3

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

Question 4

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

Answer 4

the posteior part of the inferior epiphyseal rim and vertebral body of C2 to the periosteum behind the cruciate ligament attachment site on the anterior rim of the foramen magnum

Question 5

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

Answer 5

about 90 degrees or about 18 degrees per couple

Question 6

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

Answer 6

about 50 degrees or about 10 degrees per couple

Question 7

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

Answer 7

about 33 degrees or about six degrees per couple