Nurocranium 1-2

Question 1

Cranial bones

Answer 1

Neurocranium
• Frontal bone(1)
• Parietal bones(2)
• Occipital bone(1)
• Tenporal bones(2)
• Ethmoid bone(1)
• Sphenoid bone(1)
  Visserocranium
• Maxilla(2)
• Mandible (1)
• Vomer (1)
• Palatin bones(2)
• Lacrimal bones (2)
• Nasal bones(2)
• Inferior nasal conchae(2)

Question 2

FRONTAL BONE

(OS FRONTALE) forms

Answer 2

 the majority of forehead
 roof of the orbit
 floor of the ant. cranial fossa

Question 3

Parts of frontal bone

Answer 3

1. Squamous part
2. Orbital part
3. Nasal part

Question 4

OS FRONTALE articulates with

Answer 4

Parietal
Zygomatic
Greater wing of sphenoid bone
Maxilla
Ethmoid
Lacrimal
Nasal

Question 5

Suture that connects 
frontal bones
Frontal bones and parietal bones
Parietal bones
Occipital bone and parietal bones

Answer 5

Metopic suture
Coronal suture
Saggital suture
Lamboidal suture

Question 6

Ant fontanelle and post fontanelle

Answer 6

Between the parietal and frontal bones

Between the parietal and occipital bones

Question 7

Physiologic closure time of the metopic suture is

Answer 7

over 6 years

Question 8

External surface of Squamous part

Answer 8

•Frontal eminence (tuber)
•Superciliary arch
•Glabella
•Supraorbital margin
Supraorbital notch/foramen Frontal notch/foramen
•Zygomatic process/ temporal line & surface/ parietal margin

Question 9

Internal surface of Squamous part

Answer 9

• Groove for superior sagittal sinus
• Frontal crest
• Foramen caecum
• cerebral ridges/ impressions of gyri

Question 10

Orbital part Forms

Answer 10

the roof of the orbit

Question 11

Parts of Orbital part

Answer 11

• Orbital surface
-Fossa for lacrimal gland (lacrimal fossa)
-Trochlear spine and fovea
• Ethmoidal notch
• Sphenoidal margin
• Opening of frontal sinus

Question 12

Nasal part Articulates with

Answer 12

nasal bones and

frontal process of the maxilla

Question 13

Nasal part forms

Answer 13

root of the nose

Question 14

Parts of Nasal part

Answer 14

Nasal spine
Nasion
Nasal margin

Question 15

When ant fontanelle closes it forms

When post fontanelle closes it forms

Answer 15

Bregma

Lambda

Question 16

Ethmoidal bone

Answer 16

The main bone forming the bony skeleton of the nasal cavity

Question 17

Ethmoidal bone Parts:

Answer 17

• Cribriform plate
• Crista galli
• Perpendicular plate
• Ethmoidal labyrinth
➢ Anterior cells of ethmoid bone
➢ Middle cells of ethmoid bone
➢ Posterior cells of ethmoid bone
• Orbital plate
• Superior nasal concha
• Middle nasal concha
• Ethmoidal bulla
• Uncinate process
• Semilunar hiatus

Question 18

Sphenoid bone Parts:

Answer 18

1) Body
2) Greater wing
3) Lesser wing
4) Pterygoid process

Question 19

Body of sphenoid

Answer 19

• Jugum sphenoidale
• Sella turcica
• Sulcus caroticus (Carotid sulcus)
• Sulcus prechiasmaticus (Chiasmatic sulcus)
• Carotid sulcus

Question 20

Posterior surface of sphenoid body is connected to

Inferior…………

Answer 20

connected to the basilary part of the occipital bone

connected to vomer

Question 21

Anterior surface of sphenoid body is facing to

Answer 21

the nasal cavity (aperture of sphenoidal sinus)

Question 22

Superior surface of ethmoid body has

Answer 22

sella turcica

Question 23

Lateral surfaces is the origin of

Answer 23

greater wings and the position of carotic grooves

Question 24

Sella turcica:

Answer 24

 Tuberculum sellae
- middle clinoid process
 Hypophyseal fossa
 Dorsum sellae
- posterior clinoid process

Question 25

Lesser wing

Answer 25

* Posterior clinoid process * Sphenoidal rostrum * Sphenoidal crest * Sinus of sphenoidal * Optic canal * Superior orbital fissure

Question 26

Superior orbital fissure definition and parts

Answer 26

Fissure between lesser wing and greater wing ``` ▪ Oculomotor n. ▪ Trochlar n. ▪ Abducens n. ▪ Opthalmic n. ▪ Superior apthalmic v. ```

Question 27

Holes on greater wing

Answer 27

➢ Foramen rotundum ( maxillary n.V2) ➢ Foramen ovale ( Mandibular n.V3) ➢ Foramen spinosum ( middle meningeal a. and meningeal branches of mandibular n.)

Question 28

Surfaces of greater wing

Answer 28

``` ➢ Cerebral surface ➢ Temporal surface ➢ Infratemporal surface ➢ Maxillary surface ➢ Orbital surface (anteriorly) ```

Question 29

Margins of greater wings

Answer 29

➢ Zygomatic margin ➢ Frontal margin ➢ Parietal margin ➢ Squamosal margin

Question 30

Crest and spine in sphenoid

Answer 30

* Infratemporal crest | * Spine of sphenoid

Question 31

Pterygoid process

Answer 31

➢ Lateral pterygoid plate | ➢ Medial pterygoid plate

Question 32

Medial pterygoid plate

Answer 32

``` ▪ Pterygoid notch ▪ Pterygoid fossa ▪ Scaphoid fossa ▪ Pterygoid hamulus ▪ Pterygoid canal ```

Question 33

Post margin of sphenoid is .... | Ant margin of sphenoid articulate wiyh

Answer 33

Free | Frontal and ethmoid bone