Atlanto-occipital joint

Question 1

What is the classification of the atlanto-occipital joint?

Answer 1

synovial (diarthrosis) ellipsoidal

Question 2

What other joint space does the atlanto-occipital joint communicate with?

Answer 2

the posterior bursa of the median atlanto-axial joint

Question 3

What is the median thickening of the anterior atlanto-occipital ligament called?

Answer 3

the anterior longitudinal ligament

Question 4

Ossification of the free margin of the posterior atlanto-occipital ligament results in which atypical bone classification?

Answer 4

accessory bone

Question 5

What other name may be used to identify a ponticulus posticus?

Answer 5

Kimmerle’s anomaly

Question 6

**What amount of flexion - extension is accommodated by the atlanto-occipital joint?

Answer 6

about twenty-five degrees

Question 7

**What amount of axial rotation is accommodated by the atlanto-occipital joint?

Answer 7

about three to eight degrees one side axial rotation

Question 8

**What amount of lateral bending is accommodated by the atlanto-occipital joint?

Answer 8

about five degrees

Question 9

**Which motion is best accommodated by the atlanto-occipital joint?

Answer 9

flexion - extension