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Views of the Skull
Summarizing each view of the skull
34
Anatomy
Undergraduate 3
01/21/2014

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Term
Frontal View (be able to label)
Definition
Term
(T/F) This view of the skull includes every skull bone except the occipital bone and palantine bones
Definition
True
Term
What are the main bony features visible in the frontal view (although every bone is included in this view) (7)
Definition
1. Frontal
2. Orbit (eye socket)
3. Nasal cavity
4. Maxilla
5. Mandible
6. Zygomatic
7. Nasal bones
Term
What are the 3 major foramina of the frontal view?
Definition
1. Superior orbital foramen
2. Inferior orbital foramen
3. Mental foramen
Term
Lateral View (be able to label)
Definition
Term
(T/F) Few bones can be seen from this view
Definition
False, almost all can be seen
Term
What are the main non-bony features of the lateral view?
Definition
1. Temporal fossa
2. Coronoid suture
3. Lamboid suture
4. Pterion
Term
What is the pterion?
Definition
The area where the parietal, frontal, sphenoid and temporal bones join
Term
Posterior view (be able to label)
Definition
Term
Name the sutures that are visible in this view?
Definition
1. Sagittal
2. Lamboid
Term
Superior View (be able to label)
Definition
Term
What are the 3 sutures seen in this view?
Definition
1. Coronal
2. Sagittal
3. Lamboid
Term
Inferior view (be able to label)
Definition
Term
What are the main bony features in this view that have not been covered elsewhere?
Definition
1. Nasal choanae (posterior nasal apertues)
2. Vomer
3. Inferior orbital fissure
Term
What are the main foramina of the central skull in the inferior view?
Definition
1. Froamen lacerum
2. Foramen spinosum
3. Foramen ovale
Term
What are the main foramina/canals more posterior, lateral to the occipital chondyles?
Definition
1. Stylomastoid foramen
2. Hypoglossal canal
3. Carotid canal
4. Jugular foramen
Term
Base of the skull, viewed superiorly (be able to label)
Definition
Term
How many fossa can the base of the skull be divided into?
Definition
3
Term
Name them
Definition
1. Anterior cranial fossa
2. Middle cranial fossa
3. Posterior cranial fossa
Term
What makes up the floor of the anterior fossa?
Definition
Horizontal plate of the frontal bone, plus the cribiform plate and crista galli
Term
What forms the posterior border of this fossa?
Definition
The lesser wing and jugum of the sphenoid
Term
What is the jugum of the sphenoid?
Definition
The portion anterior to the sella turcica, where the optic chiasm rests
Term
How is the shape of the middle fossa described?
Definition
Butterfly shaped
Term
What bones make up the "body" of the butterfly?
Definition
Sphenoid body
Term
What makes up the wings of the butterfly?
Definition
The greater wing and temporal bone
Term
What are the prominent openings in this fossa?
Definition
1. Optic canals
2. Superior orbital fissures
3. Foramen rotundum
4. Foramen spinosum
5. Foramen ovale
Term
What forms the optic canal?
Definition
The space between the anterior clinoid processes
Term
What forms the superior orbital fissure?
Definition
The space between the greater and lesser wings of the sphenoid
Term
What forms the major portion of the posterior cranial fossa?
Definition
The occipital bone
Term
What forms the anterior border of this fossa?
Definition
The vertical wall of the petrous temporal bone
Term
What are the 3 major holes in the posterior fossa?
Definition
1. Foramen magnum
2. Jugular foramen
3. Hypoglossal canal
Term
Where is the hypoglossal canal?
Definition
In the wall of the foramen magnum
Term
What do the grooves in the walls of the fossa indicate?
Definition
The passing of the transverse and sigmoid venous sinuses
Term
What is the clivus?
Definition
An anterior feature of the occipital bone that runs steeply towards the sella turcica
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