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17 Cards in this Set
- Front
- Back
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regions of the skull (3)
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-cranial vault
-cranial base -face |
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cranial fossae (3):
div boundary |
-anterior fossa: frontal bone to sphenoid bone
-middle fossa: sphenoid, temporal -posterior fossa: temporal (?) -> occipital |
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Unpaired bones of the skull (7)
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-frontal
-occipital -sphenoid -ethmoid -vomer -mandible -hyoid |
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Paired bones of the skull (9)
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-parietals/temporals
-nasals/lacrimals -zygomatics/maxillae -inferior nasal conchae -palantines -ear ossicles |
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Synchondrosis
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-immovable joint with cartilage in between
-allows enough movement for birth and growth |
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Sutures??
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-growth is all compensatory (as brain pulls it apart)
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Importance of the relative thickness of hemopoetic tissues (? or bone plates?) in humans
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-thin on side, thick on top
-great impact absorber |
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cranial sinuses (5)
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-frontal
-ethmoidal -sphenoidal -maxillary -temporal |
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what is unique to the temporal sinuses?
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-is really air cells (holes), not sinuses. Infection possible
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Bone features (3)
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-arteriovenous impressions
-venous sinus impressions -musculotendinous/ligamentous attachments |
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embryologic origins of the neurocranium
Chondrocranium comprises Membranous neurocranium comprises |
-paraxial mesonderm (NOT neural crest mesoderm)
-comprises: Parachordal, prechordal, trabecular parts and cartilaginous sense capsules -cranial vault bones, except temporal squama |
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Viscerocranium:
Cartilaginous viscerocranium (arch 1,2,3,4-6) |
-neural crest
1: mandible, sphenomandibular lig, malleus, incus 2: stapes, styloid process, part of hyoid 3: part of hyoid 4-6: laryngeal cartilages |
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Viscerocranium:
Membranous portion |
-maxillae
-zygomatics -temporal squama |
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bregma
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-junction of frontal bone and parietal bones (lateral)
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nasion
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-junction of frontal bone and nasal suture (midline)
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inion
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-highest point of the external occipital protuberance
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Frankfurt horizontal plane
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-defined by rt/lt chorions (at the ears)
-extends to orbitals -to make sure head is straight |
