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