Term
| When does development of the Orofacial Structures occur? |
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Definition
| During the 4th-12th weeks of prenatal development |
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Term
| When does palatal development occur? |
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Definition
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Term
| How does the palatal development occur? |
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Definition
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Term
| What week does the primary palate form? |
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Definition
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Term
| What week does the secondary palate form in? |
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Definition
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Term
| When do the primary and secondary palates fuse together? |
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Definition
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Term
| What does the intermaxillary segment form from? |
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Definition
| the fusion of the 2 medial nasal processes |
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Term
| Where does the intermaxillary segment form? |
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Definition
| below and deep to the nasal pits |
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Term
| What does the intermaxxillary segment form into? |
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Definition
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Term
| What does the primary palate do? |
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Definition
| separates the nasal and oral cavities, will become the anterior portion of the hard palate |
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Term
| What are the two palatal shelves that the maxillary process develops? What week does this occur in? |
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Definition
| the lateral palatine processes, about the 6th week |
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Term
| How do the lateral palatine processes grow? |
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Definition
| inferiorly and deep in the stomodeum and in a vertical direction alongside the tongue |
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Term
| What happens to the palatal shelves in the 8th or 9th week? |
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Definition
| they "flip" and go horizontally above the tongue, then the shelves grow towards each other and fuse |
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Term
| What does the secondary palate form? |
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Definition
| the posterior 2/3 of the hard palate, the soft palate, the uvula |
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Term
| Which tooth buds does the secondary palate contain? |
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Definition
| the canines and posterior teeth |
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Term
| What is the evidence of fusion of the secondary palate? |
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Definition
| palatine raphe and median palatine suture |
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Term
| Where is the first site of fusion in the secondary palate? How does it spread? |
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Definition
| the middle, spreads anteriorly and posteriorly |
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Term
| What does the secondary palate separate? |
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Definition
| oral cavity from the nasal cavity |
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Term
| When is the secondary palate completed? |
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Definition
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Term
| When do the nasal cavity and septum form? |
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Definition
| at the same time as the palate |
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Term
| What does the nasal cavity and septum form from? |
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Definition
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Term
| How does the nasal cavity and septum grow? |
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Definition
| grows down towards the stomodeum |
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Term
| What does the nasal cavity and septum fuse with? |
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Definition
| the two lateral palatine processes |
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Term
| When does fusion of the nasal cavity and septum occur? |
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Definition
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Term
| What does fusion of the nasal cavity do and what does it separate it from? |
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Definition
| fusion divides the nasal cavity and separates it from the oral cavity |
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Term
| What is a cleft palate caused by? |
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Definition
| failure of the lateral palatine processes to fuse with the primary palate |
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Term
| What are the variants in cleft? (2) |
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Definition
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Term
| Which form of cleft is seen more in boys? |
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Definition
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Term
| Which form of cleft is seem more in girls? |
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Definition
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Term
| In which weeks does the tongue develop in? |
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Definition
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Term
| What does the tongue form from? |
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Definition
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Term
| Which arch does the body of the tongue form from? |
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Definition
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Term
| Which arch(s) develops the base of the tongue? |
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Definition
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Term
| What else does the branchial arches form? |
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Definition
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Term
| Where do swellings of the mesenchyme occur? Which week does this occur in? |
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Definition
| The swellings of the mesenchyme develop in the midline of the floor of the pharynx. This occurs in the 4th week |
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Term
| Where is the tuberculum impar located? |
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Definition
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Term
| Where do the lateral lingual swellings develop? |
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Definition
| On each side of the tuberculum impar |
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Term
| Where do the tuberculum inpar and lateral lingual swellings come from? |
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Definition
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Term
| What happens to the lateral lingual swellings? |
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Definition
| the overgrow the tuberculum impar and fuse |
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Term
| What is evidence of the fusion of the lateral lingual swellings? |
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Definition
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Term
| What process/cells form the lingual frenum? |
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Definition
| cells around the lingual sewllings degenerate, this frees the tongue from the floor of the mouth, except in the midline. Hence, the lingual frenum. |
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Term
| Where is the copula located? |
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Definition
| behind the 3 anterior swellings |
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Term
| What does the copula form from? |
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Definition
| the 3rd branchial arch and part of the 4th branchial arch |
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Term
| What happens to the copula in the in the 8th week? |
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Definition
| it overgrows the 2nd arch and fuses with the body of the tongue to form the base of the tongue |
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Term
| What is the evidence of the fusion of the base of the tongue? |
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Definition
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Term
| Where does the sulcu terminalis point? |
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Definition
| backward towards the oropharynx |
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Term
| What is the foramen cecum? |
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Definition
| small, pit-like depression that is the beginning of the thyroglossal duct |
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Term
| What is the 3rd swelling located posterior to the copula? |
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Definition
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Term
| Which branchial branch does the epiglottic swelling develop from? |
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Definition
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Term
| Where does the epiglottic swelling develop? |
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Definition
| develops in the most posterior region of the tongue and epiglottis |
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Term
| Where do the base of the tongue and epiglottis descend and at what age does this occur? |
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Definition
| they descend into the oropharynx by age 4 |
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Term
| Where do intrisic muscles of the tongue originate from? |
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Definition
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Term
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Definition
| after the tongue is complete |
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Term
| What are the 5 papillae of the tongue? Name in order of development. |
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Definition
1.Circumvalatte and foliate
2.fungiform and filliform
3.taste buds |
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Term
| Where does the epoglottic swelling develop into? |
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Definition
| the most posterior region of the tongue and epiglottis |
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Term
| At what age do the base and epiglottis descend into the oropharynx by? |
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Definition
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Term
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Definition
| at the end of the 8th week |
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Term
| Where do the intrinsic muscles of the tongue originate? |
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Definition
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Term
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Definition
| after the tongue is completed |
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Term
| What are the 5 papillae? (list them in order of when they develop) |
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Definition
1.circumvallatte and foliate
2.fungiform and filiform
3.taste buds |
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