Skull Flashcards
(44 cards)
How many bones are in the Neurocranium?
8
How many bones are in the splanchnocranium?
14
Name all 14 bones in Splanchocranium
2 Nasal bones
2 Maxillae
2 zygomatic bones
2 Lacrimal bones
2 Inferior Nasal Conchae
2 Palatine bones
1 Vomer
1 Mandible
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Name all Neurocranium bones and which 2 contribute to the facial bones as well?
1 Frontal bone
2 Parietal bone
2 Temporal bone
1 Occipital bone
1 Sphenoid bone
1 Ethmoid bone
Sphenoid and ethmoid bones contribute to the facial bones (orbit)
Where does hematopoiesis happen in the skull?
The Diploe, is made of 2 thin sheets of compact bone and a layer of fibrous bone.
What are the functions of the skull?
Support for face structure.
Protection for essential organs: brain, eyes.
Movement provides attachment points for facial muscles.
Where can I find the alveolar process of the maxilla or the mandibles?
Just superior or inferior to the teeth, provides an attachment point.
Where would the supraorbital nerve and vessels pass through?
The supraorbital foramen.
Superior to the orbit.
Superior to the Vomer, what bone would I find attached?
Perpendicular plate of ethmoid bone.
What is the supraorbital margin?
A bony ridge superior to the orbit, it is thicker than the frontal bone.
Acts as protection for the eyes.
What is the supraorbital notch?
An incomplete opening along the supraorbital margin.
What direction does the skull grow?
Downwards.
What has the biggest impact on skull morphology as one ages?
Loss of teeth contributing to bone reabsorption.
Where is the mastoid process?
Posterior inferior from the external auditory meatus.
Where is the Styloid process?
Inferior medial to the external auditory meatus, sharper shape.
What are the primary sutures of the neurocranial bones?
- Coronal suture - along the coronal plane, between frontal and parietal bones.
- Saggital suture - along the saggital plane, between the 2 parietal bones.
- Lambdoid suture, between the occipital and parietal bones.
- Squamosal suture, between the temporal and parietal bones.
Where is the external occipital protuberance?
Can be seen on the occipital bone.
Where is the occipital condyle and what is its purpose?
On the sides of the Foramen Magnum, articulates with indentations of the atlas (first cervical vertebra) to form atlanto-occipital joint.
How is the sphenoid bone positioned?
The sphenoid bone makes up the posterior wall of the orbit, it can also be seen anterior to the temporal bone on the lateral sides of the skull.
How is the ethmoid bone positioned?
The ethmoid bone can be seen on the lateral sides of the skull, anterior to the sphenoid bone.
Where is the Sella Turcica located?
Internal of the Cranial space, medial within the sphenoid bone.
What are the 3 areas of the Sella Turcica?
Dorsal sellae
Hypophyseal fossa - central depression where the pituitary gland sits.
Tuberculum sellae
Where is the mandibular fossa?
Anterior to the exterior auditory meatus, articulates the mandible.
Where is the articular tubercle?
Anterior to the mandibular fossa, also articulates the mandible.
