Lecture 4: Skull Flashcards
What are the paired cranial bones?
Temporal
Parietal
What are the unpaired cranial bones?
Frontal
Occipital
Sphenoid
Ethmoid
What are the paired facial bones?
Zygomatic
Lacrimal
Nasal
Palatine
Maxillae
Inferior Nasal Conchae
What are the unpaired facial bones?
Vomer
Mandible
What is the clinical significance of the Pterion landmark on the skull?
Middle Meningeal A. lies just deep to it, can rupture if there is a blow to the side of the head
What is a metopic suture?
Incomplete fusion of the frontal bones in the saggital plane
-can cause clept lip or palate
Why would bone flaps be created during surgery?
Incorporating as much overlying tissue with the bone allows periosteium to heal the best
Can be skin, muscle, fascia, etc.
What 2 bones meet at the coronal suture?
Frontal bone and Parietal bone
What 2 bones meet at the saggital suture?
Both parietal bone
What 2 bones meet at the Lambdoid suture?
Occipital bone and Parietal bone
What 2 bones meet at the Squamosal suture?
Temporal bone and parietal bone
What articulates with each other when nodding your head yes?
Atlas and the Occipital Condyles
What structure is found in the sella turcica?
Pituitary Gland
Clinical Significance: Tumor of pituitary gland can damage optic nerve and cause blindness
What cranial bone contains the foramen rotundum, foramen ovale, and foramen spinosum?
Sphenoid Bone
What blood vessel is transmitted through the foramen spinosum?
Middle Meningeal A.
What cranial bone does the pterygoid canal run through?
Sphenoid B.
What is the attachment for the Falx Cerebri in the Ethmoid bone?
Crista Galli
What bone is the cribiform plate located in?
Ethmoid Bone
What bone forms the superior portion of the Nasal Septum?
Perpendicular plate of Ethmoid bone
What bone forms the inferior portion of the Nasal Septum?
Vomer Bone
What part of the Vomer B. articulates with the Sphenoid B.?
Ala
What bone is part of the orbit, nasal cavity, and hard palate?
Palatine Bone
Cleft lip is a failure of what bones to fuse?
Palatine and Maxilla
What structure in the maxilla separates the hard palate from the anterior nasal spine?
Incisive foramen
What is the largest paranasal sinus in the skull?
Maxillary Sinus
What does a Le Fort I fracture involve?
Fracture of the alveolar process of maxilla
What does a Le Fort II fracture involve?
Fracture of maxilla partially through the orbit and at the zygomaxillary suture
What does a Le Fort III fracture involve?
Fracture dislocating upper face from the cranium (through the orbit)
What bones comprise the nasal complex?
Frontal B.
Sphenoid B.
Ethmoid B. (Superior and middle nasal conchae)
Horizontal plate of palatine B.
Maxilla
Inferior nasal concha B.
Lacrimal B.
Nasal B.
What bones form the roof of the orbit?
Lesser wing of sphenoid B.
Frontal B.
What bones form the lateral wall of the orbit?
Frontal B. (zygomatic process)
Sphenoid B. (Greater wing)
Zygomatic B. (Orbital surface)
What bones form the medial wall of the orbit?
Maxilla (frontal process)
Lacrimal B.
Ethmoid B. (Lateral mass)
What bones form the floor of the orbit?
Palatine B. (Perpendicular plate)
Maxilla (orbital surface)
Zygomatic B.
What bones form the orbit?
Frontal B.
Sphenoid B.
Zygomatic B.
Maxilla
Palatine B.
Lacrimal B.
Ethmoid B.
What are the paranasal sinuses?
Frontal
Sphenoid
Ethmoid
Maxillary
What is the clinical significance of the Anterior Fontanelle of the fetal skull?
Largest fontanelle, can extract CSF
