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7 Cards in this Set
- Front
- Back
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What is the source of skull bone?
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neural crest
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What are the 3 modes of bone growth in the skull?
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-endochondral - occurs at synchondroses, like epiphyses of long bones
-sutural - creation of bone in sutures -remodeling - complex scouring and addition of bone to vreate new surface |
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What are the types of mesenchyme that will become skull bone?
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-endochondral - laid down as cartilage later ossified
-intramembranous - laid down directly as bone -pharyngeal arch - neural crest cells migrate into arches then form bone |
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How does the base of the skull grow?
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laid down in cartilage, will retain synchondoses, until puberty when growth plates will close
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What is the basis for cranial growth?
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cranial growth is under the influence of the brain, but adapts to other structures as well (think of middle meningeal artery), will fill in areas
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How does the bone of the face grow?
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sutures are arranged in a plane, will grow inferiorly and out to enlarge overall size
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Where do sinuses come from?
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result of groeh of the skull tables away from each other, outer and inner, space invaded by blood vessels, then respiratory epithelium, then becomes a sinus
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