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16 Cards in this Set
- Front
- Back
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What are the numerous regions of bone formation during the fetal development of the fetal skull?
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ossification centers
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What do the independent bony regions of bone during fetal development do as the bones fuse? What is an example of this?
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They diminish in number (frontal bone begins as two separate ossification centers, but then fuses into a single frontal bone)
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What bones are developed by intramembranous ossifciation?
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flat bones of the skull, some of the facial bones (zygomatic bone, maxilla, and mandible), the central part of the clavicle, and sesamoid bones (kneecap patella),
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When does the most significant growth in the skull occur by?
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age 5
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By age 5 what percentage of brain growth is complete?
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30-95% is complete, the cranial bone growth is nearly complete, and the cranial sutures are almost fully developed.
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Why is the cranium of a young child relatively larger than the rest of the body?
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The skull grows at a much faster rate
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What separates the bones covering the brain during fetal development?
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Flexible fibrous sutures
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how many large membranous areas of skull provide spaces between the developing bones?
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Six
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What are the 6 large membranous areas of the skull that provide spaces between developing bones called?
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Fontanels
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What are fontanels sometimes referred to as?
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Soft spots
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What is the shifting of bone during parturation called?
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molding
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What is plagiocephayly?
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misshapen head, can affect facial structure
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Why can a baby develop plagiocephaly?
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Fear of SIDS, so parents place the baby on its back
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What is a result of sunken and bulging fontanels?
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dehydration and meningitis or increased intracranial pressure
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As a person ages, what happens to their teeth?
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They start to wear down and may even be lost, if a person loses their teeth alveolar processes that cover the alveoli errode and can eventually disappear.
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What is the order of fusing sutures?
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coronal suture
sagittal suture squamosal suture |
