Midline Bones

Question 1

What are the midline bones of the cranium?

Answer 1

• Occiput

- Sphenoid

Question 2

What are the midline bones of the facial?

Answer 2

• Vomer
• Ethmoid
• Mandible

Question 3

What midline bones move in the same direction?

Answer 3

• Ethmoid moves in same direction as occiput

- Vomer moves in same direction as sphenoid

Question 4

What five bones articulate with vomer?

Answer 4

1. Sphenoid
2. Ethmoid
3. Septal cartilage
4. Maxillae
5. Palatines

Question 5

What five bones articulate with the parietal bone?

Answer 5

1. Occiput
2. Frontal
3. Sphenoid
4. Temporal
5. Opposite parietal

Question 6

What are the sutures found with the parietal bone?

Answer 6

1. Sagittal
2. Coronal
3. Parietal Squamous
4. Parietomastoid
5. Lambda
6. Sphenoparietal

Question 7

How does the parietal bone move?

Answer 7

• Flexion = ER –> Temporal articulation moves laterally

- Extension = IR –> temporal articulation moves medially

Question 8

What five bones does the temporal bone articulate?

Answer 8

1. Occiput
2. Parietal
3. Sphenoid
4. Zygoma
5. Mandible

Question 9

Where is the axis of the temporal bone?

Answer 9

• Just inferior to petrous ridge

Question 10

What seven bones does the frontal bone articulate?

Answer 10

1. Parietals
2. Sphenoid
3. Zygoma
4. Lacrimals
5. Ethmoid
6. Maxillae
7. Nasals

Question 11

Where do the index fingers go in vault hold?

Answer 11

• Rest on the greater wing of the sphenoid

Question 12

What is the hand contact in the frontal occipital contact?

Answer 12

• Posterior –> Hand rests on table cradling the patient’s occiput
• Anterior –> Thumb on one greater wing of sphenoid and index or middle finger on the other wing

Question 13

What does the Becker contact look like?

Answer 13

• Thumbs –> rest on greater wings
• Index fingers –> rest on mastoid processes
• Middle to pinky fingers –> rest on occiput with middle finger posterior to OM suture