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21 Cards in this Set

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  • Back
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What bone is often referred to as the bridging bone?
Sphenoid bone
Why is the sphenoid bone called the bridging bone?
Because it unites many of the cranial bones and facial bones
What does the sphenoid bone contain that empty's its contents into the nasal cavity?
Sphenoidal sinuses
What bones contain sinuses that drain into the nasal cavity?
Sphenoid and frontal sinuses
What is the most often fractured bone in the body and why?
Sphenoid bone, because it is hollow and it contains numerous foramina.
What is located on the superior medial portion of the sphenoid bone?
Sella Turcica
What does the sella turcica house?
Inferior portion of the pituitary gland that projects from the base of the brain
Where is the pituitary gland located?
it is anchored onto the sella turcica
What is "head into the dashboard syndrome"
Sudden traumatic shifting to the brain may sever the pituitary stalk
What part of the sphenoid bone contributes to the orbits and to the nasal cavity?
The wing like projections on either side of the bone.
What foramina are associated with the sphenoid bone?
Optic foramen
Foramen rotundum
Foramen Ovale
Foramen Spinosum
Superior orbital fissure
Foramen lacerum
What do each of these foramina associated with the sphenoid bone serve a purpose for?
Optic foramen
Foramen rotundum
Foramen Ovale
Foramen Spinosum
Superior orbital fissure
Foramen lacerum
(optic) canal, allows passage of the optic nerve
Foramen rotundum: allows passage of one of the 3 branches of the trigeminal nerve
Foramen Ovale: Allows passage of a branch of a cranial nerve
Superior orbital fissure: Small opening for meningeal bv's
Superior orbital fissure: Allows passage of several cranial nerves
Foramen LacerumLocated BETWEEN the petrous portion of the temporal bone, the sphenoid bone, and the occipital bone.
The trigeminal nerve goes through the foramen rotundum (a 2nd division nerve block isused to desensitize all of the upper teeth on one side of the maxilla); 3rd branch comes out of mandibular foramen, (1st division)
Which canal allows passage of the optic nerve?
Optic foramen
Which canal allows passage of one of the 3 branches of the trigeminal nerve?
Foramen rotundum
What does the trigeminal nerve do?
Conveys sensations from the teeth and gums of the maxillae
An injection of what not far below the foramen rotundum desensitizes all of the upper teeth on one side of the maxilla? pg.45 in notes
Anesthetic called a second division nerve block
What is the second division nerve block and where is it injected?
An injection of anesthetic not far below the foramen rotundum that desensitizes all of the upper teeth on one side of the maxilla.
What canal allows passage of a branch of a cranial nerve? What nerve?
Foramen Ovale (mandibular nerve of trigeminal nerve)
What is a small opening for meningeal bv's?
Foramen Spinosum
What does the superior orbital fissure do?
Allows the passage of several cranial nerves
Which canal is closed off by connective tissue in a living person?
Foramen Lacerum