(Test #1) Cranial Midline Bones

Question 1

Midline or Unpaired Bones

Answer 1

1) CRANIAL:
 Ethmoid
 Occiput 
 Sphenoid
 (Frontal)

2) FACIAL:
 Mandible
Vomer

Question 2

Paired Bones

Answer 2

1) CRANIAL:
 Parietal
 Temporal
 (Frontal)

2) FACIAL:
 Inferior nasal concha
 Lacrimal
 Maxilla
 Nasal
 Palatine 
 Zygoma

Question 3

SBS Motion- Ethmoid, Vomer, and Palatines

Answer 3

• The basiocciput will move vertically in sphenobasilar symphysis (SBS) flexion, causing a rotation of the ethmoid bone
• When the SBS is in FLEXION:
  1) The ETHMOID will move in the SAME DIRECTION as the OCCIPUT

2) The VOMER will move in the SAME DIRECTION as the SPHENOID
3) The palatines will move in EXTERNAL ROTATION primarily
4) INTERPALATINE SUTURE will move INFERIORLY with vomer and maxillae