Intro to the Skull Flashcards
(35 cards)
What feature of the TMJ prevents the over-protrusion of the mandible
Articular tubercle
What divides the middle and posterior cranial fossa
Petrous ridge
Where does CN VIII (vestibulocochlear nerve) enter
Through the internal auditory meatus
What is the function of the petrosal nerve
Innervates mucus membranes, parotid, and lacrimal glands
What part of the sphenoid bone houses the sphenoidal sinuses
Body
Superior orbital fissure of the sphenoid provides the passageway between
Greater and lesser wings for nerves and vessels of the middle cranial fossa to go to the orbit
What part of the mandible houses the alveolar process
Body
What marks the opening of the mandibular canal?
Lingula
What allows communication between the temporal and infratemporal fossae
Zygomatic arch
Hypophyseal fossa contains
Pituitary gland
Cruciate suture consists of
Intermaxillary suture
Maxillary/palatine suture
Interpalatine suture
What is craniosynostosis?
Premature closing of a cranial suture
What is the pterion?
Location where the temporal, sphenoid, pariental, and frontal bones approximate each other
What is the clinical significance of the pterion?
It is the weakest part of the skull
A traumatic blow to this area may rupture the middle meningeal artery, causing an epidural hematoma
What is the asterion?
Where the mastoid portion of the temporal, occipital, and parietal bones meet
Bregma
Intersection of coronal and sagittal sutures
Lambda
Top of the triangle of the lamboidal suture
Inion
External occipital protuberance
Opisthion vs basion
Basion = anterior most portion of foramen magnum
Opisthion = posterior-most portion of foramen magnum
Parietal foramena
Exit holes for emissary veins
Sella turcica houses
Pituitary gland
Clivus
Ramp formed by basilar portion of occipital bones leading to the anterior portion of the foramen magnum
What anchors the falx over the pituitary
Anterior clinoid process
Sella turcica
Foramen caecum
Exit hole for emissary veins that courses through the nasal cavity
