Osteology of the Skull Flashcards
What are the 8 bones of the neural cranium?
frontal parietal-2 temporal-2 occipital sphenoid ethmoid
what are the 14 bones of the facial skeleton
maxillae-2 zygomatic-2 palatine-2 inferior concha-2 nasal-2 lacrimal-2 vomer madible
what are the six bones of the middle ear
malleus-2
incus-2
stapes-2
what type of joint are the majority of the skull bones
fibrous ( synarthrosis) sutural joints
Name two synovial joints of the skull
temporo-mandibular jt
ear ossicles
what bones are connected by the coronal suture
frontal and parietal
what bones are connected by the sagittal sutures
left and right parietals
what bones are connected by the lambdoidal sutures
occiput and parietal
what type of suture are the coronal, sagittal and lambdoidal sutures classified as
serrated sutures
what bones are connected by the squamosal suture
squamosal portion of temporal and parietal
what is the vertex
top most portion of the head
what is the bregma
junction b/t coronal and sagittal sutures
what is lambda
junction b/t sagittal and lambdoidal sutures
what are the parietal eminences
ridge on side of head
what are the superciliary arches
ridge along superior border of orbit
what is the glabella
prominence along the bridge of nose
what is the capacity of the cranial vault
1500cc
what are the borders of the anterior cranial fossa
orbital plates of the frontal bone
cribriform plate of the ethmoid bone
lesser wings of the body of the sphenoid
anterior clinoid process
what two landmarks are found in the cribriform plate
cribriform foramina- where CN1 passes through
crista galli- crest of bone on midline
what are the borders of the middle cranial fossa
greater wings of the sphenoid body of the sphenoid including: sella turcica hypophyseal fossa Temporal bones including: squamous portion petrous portion
what passes through the optic canal
CN2 -optic n
opthalmic artery
what passes through the superior orbital fissure
CN3- occulomotor
CN4- trochlear
CN6- abducents
V1 Branch(CN5)- Opthalmic
what passes through the foramen rotundum
V2 branch(CN5)- maxillary
what passes through the foramen ovale
V3 Branch(CN5)- mandibular n
what passes through the foramen spinosum
middle meningeal artery (entering the cranial cavity)
What is unique about the foramen lacerum
It is closed by fibrocartilage
The carotid canal opens into this cavity
Therefore the the carotid artery passes ACROSS the foramen lacerum
What are the borders of the posterior cranial fossa
occipital bone petrous portion of the temporal bone body of the sphenoid including: dorsum sella posterior clinoid process
What is contained within the internal auditory meatus
CN7-Facial
CN8- vestibulocochlear
internal auditory artery
What is contained within the jugular foramen
CN9-glossopharyngeal
CN10- Vagus
CN11- spinal accessory
internal jugular vein
what is contained in the foramen magnum
spinal chord to brainstem transition
vertebral arteries
spinal root of CN11-spinal accessory
What is contained in the hypoglossal canal
CN12- Hypoglossal
What is contained in the condylar canal
(variable)
Emissary veins
