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21 Cards in this Set
- Front
- Back
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The face develops from how many neural crest-derived prominences?
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5
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What do the 5 NC prominences surround?
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Stomadeum (primitive oral cavity)
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What form on the lateral sides of the frontonasal prominence?
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Nasal placodes, which invaginate and form nasal pits
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What forms on either side of the nasal pit?
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Medial and Lateral nasal prominences
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What fuses, forming the mandible and lower lip?
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Mandibular prominences
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What fuses to form the bridge & septum of the nose, as well as the philtrum and primary palate?
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Medial nasal prominence
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Where is the philtrum found?
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Between nose and primary palate
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What forms the alar cartilage of the nose?
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Lateral nasal prominences
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What connects around the 6th week, forming the upper lip and cheek?
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Maxillary prominences
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What membrane eventually degenerates that separates the nasal sac from the primitive oral cavity?
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Oronasal membrane
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Where are the oral and nasal cavities continuous?
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Posterior to the primary palate
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What embryological structure grows inward and fuses to form the secondary palate?
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Palatine shelves
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What aspects form the hard palate?
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Maxillary and palatine bones
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What grows in to form the nasal septum, which meets the palates to separate the 2 halves of the nasal cavity?
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Medial nasal prominences
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What grows in the lateral walls of the nasal cavities?
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Nasal conchae
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What marks the intersection of the primary palate and two halves of the secondary palate?
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Incisive foramen
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What is caused by failure to fuse of the maxillary prominence with the medial nasal prominence on one side?
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cleft lip or cleft upper jaw
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What results from lack of fusion of palatine shelves?
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Cleft palate
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What 4 processes can cause cleft palate?
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Inhibition of the fusion process, smallness of shelves, failure of shelves to elevate, or failure of tongue to drop
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What two teratogens can cause clefting?
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Alcohol and anticonvulsant drugs
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Commonality of cleft lip/palate
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Cleft lip: 1/1000 births, CP: 1/2500 births
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