Sinus Comp Flashcards
How many cranial bones are there?
8
- frontal
- parietals (2)
- occipital
- temporals (2)
- sphenoid
- ethmoid
What bones make up the calivarium?
- frontal
- parietals (2)
- occipital
What bones make up the floor?
- sphenoid
- ethmoid
- temporals (2)
How many facial bones are there?
14
- maxilla (2)
- zygoma (2)
- lacrimal (2)
- nasal (2)
- inferior nasal conchae (2)
- palantine (2)
- vomer
- mandible
Sutures?
- Sagittal : side to side
- Coronal: front to back
- Lambdoidal: parietals to occipital
- Squamosal: parietals to temporals
Portions of the frontal bone?
- squamous/vertical (forehead)
- orbital/horizontal (superior orbit)
What passes through the supraorbital notch?
-orbital nerve/artery
What forms the superior part of the orbit?
-orbital plate, separated buy the ethmoid notch
What does the frontal bone articulate with?
- R/L parietals
- sphenoid
- ethmoid
What parts of the skull so the parietals form?
The lateral portion and part of the roof
What is the widest part of the skull?
Parietal tubercles
What do the parietals articulate with?
- frontal
- occipital
- temporals
- sphenoid
- opposite parietal
What does the occipital bone articulate with?
- 2 parietals
- 2 temporals
- sphenoid
- atlas (C1)
What do the temporal bones house?
-organs of hearing and balance
What forms the zygomatic arch?
- Zygomatic process of the temporal bone
- Temporal process of the zygoma
Where is the temporomandibular fossa located?
Anterior to the EAM and inferior to the zygomatic process
3 parts of the temporal bones?
- Squamous portion: thin, most vulnerable
- Mastoid portion: posterior to EAM, contains air cells
- Petrous portion: petrous ridges (pyramids), housing for hearing/balance
What transmits nerves of hearing and equilibrium?
Internal acoustic meatus
What is an anchor for all 8 cranial bones?
Sphenoid
Where is the sphenoid sinus located in the sphenoid?
Body
Another name for sella turcica?
Turkish saddle
What sits in the sella turcica?
Pituitary gland
What is the clivus for?
Base of support for the pons and basilar artery
Where are the anterior and posterior clinoid processes located?
Anterior: lesser wings of the sphenoid
Posterior: dorsum sellae