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23 Cards in this Set
- Front
- Back
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what does the face develop from?
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5 neural crest-derived prominences
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what do the 5 facial prominences surround?
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stomadeum (primitive oral cavity)
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how do nasal pits form?
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nasal placodes invaginate
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what does formation of the nasal pit produce?
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medial and lateral nasal prominences
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what does fusion of the mandibular prominences form?
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mandible and associated soft tissue (lower lip)
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what does fusion of the medial nasal prominences form?
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bridge and septum of nose, intermaxillary segment: philtrum, primary palate (incisive bone)
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what do the lateral nasal prominences form?
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alar cartilages of the nose
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how do the maxillary prominences grow relative to the medial nasal prominences?
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the maxillary prominences grow medially against the medial nasal prominences.
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what forms the upper lip?
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formed by the two medial nasal prominences and the two maxillary prominences
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what forms the cheek region?
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maxillary prominences
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how does the nasal sac form?
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the nasal pit elongates.
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what does the oronasal membrane separate? what happens to it?
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separates the nasal sac from the primitive oral cavity. it thins and degenerates
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where are the oral and nasal cavities continuous during development?
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posterior to the primary palate
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with regards to the palate, what grows inward from the maxillary prominences?
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palatine shelves
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what completes the secondary palate?
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fusion of the two maxillary processes
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what comprises the hard palate?
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maxillary and palatine bones
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what does the nasal septum meet as it grows inward?
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primary and secondary palates
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where do the nasal conchae grow in from?
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lateral walls of the nasal cavities
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what marks the intersection of the primary palate and the two halves of the secondary palate?
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incisive foramen
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which clefts lie anterior to the incisive foramen?
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lateral cleft lip and cleft upper jaw.
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what causes clefts anterior to the incisive foramen?
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partial or complete lack of fusion of the maxillary prominence with the medial prominence on one side.
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what is cleft palate a result of?
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lack of fusion of the palatine shelves.
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are most cases of cleft lip and cleft palate unifactorial or multifactorial?
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multifactorial
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