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sweetpea281
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what are the three stages of palatal development?
- primary palate formation
- secondary palate formation
- completion of the palate
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what is the triangular mass that forms from the intermaxillary segment?
primary palate
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what does the primary palate partially separate?
the nasal and oral cavities
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what does primary palate formation give rise to?
anterior incisors
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what are the bilateral palatal shelves that form from the maxillary processes?
secondary palate
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what do the palatal shelves form from?
maxillary processes
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the palatal shelves grow _____ at first then they ____ _____ and fuse together to form the _____ _____.
- downward
- snap upward
- secondary palate
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the tongue has to move from the _____ to the _____ ___ so it doesn't get in the way of the ____.
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what does secondary palate formation give rise to?
maxillary canines, posterior teeth, soft palate and uvula
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what happens in the completion of the palate?
the primary and secondary palate fuse
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what are the four types of clefting that can happen with the formation of the primary and secondary palate formations?
- cleft uvula
- bilateral cleft of secondary palate
- cleft of the primary palate
- cleft of both primary and secondary palate
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what is the mildest form of clefting?
cleft uvula
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what clefting is it when the palatal shelves don't fuse completely in the back?
cleft uvula
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what kind of clefting is it when the palatal shelves don't fuse to each other?
bilateral cleft of the secondary palate
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what kind of clefting is it when the two palates don't fuse together? explain
- cleft of the primary palate
- complete bilateral cleft of the lip and alveolar process with bilateral cleft of the primary palate
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what kind of clefting is it when nothing fuses? explain.
- cleft of both primary and secondary palate
- cleft of the lip and alveolar process with complete bilateral cleft of the primary and secondary palatal portions
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what does the nasal septum develop from and what does it fuse with?
- develops from the intermaxillary segment
- fuses with the palate
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what does the nasal septum divide?
divides the nasal cavity.
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what causes snoring and other sinus problems?
deviated septum
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where does the development of the tongue all take place?
pharynx
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when does the tongue move to the oral cavity?
before the snap, must get out of the way
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what branch does the body of the tongue come from?
branchial arch 1
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what does the body of the tongue formation start with? and where is it located?
- starts with the tuberculum impar
- behind the branchial arch I
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two ____ ____ ____ develop on each side of the ______ ____ forming the body of the tongue.
- lateral lingual swellings
- tuberculum impar
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what fuse and overgrow the tuberculum impar to form the body of the tongue?
lateral lingual swellings
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why do the cells degenerate on both sides of the tongue?
to free it from the floor of the mouth
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true/false. the cells don't degenerate down the middle of the tongue forming the midline lingual freunum?
true
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what is anklyglossia?
tongue-tied, the midline lingual frenum is too long and restricts the movement of the tongue
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what arches does the bas of the tongue form from?
branchial arch 2 and 4
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what forms the base of the tongue and where does it come from?
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what comes from branchial arch 4?
epiglottic swelling
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what is the purpose of the epiglottis?
covers the trachea when you swallow so you don't drown
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what is the line down the middle of the tongue? and how is it created?
- median lingual sulcus
- lateral lingual swellings fuse
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body + base=
sulcus terminalis
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the fusion of the copula is marked by?
the sulcus terminalis
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where is the foramen cecum?
depression at the back of sulcus terminalis
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the ____ ____ is the beginning of the _____ duct.
- foramen cecum
- thyroglossal duct
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why is the tongue innervated by so many nerves?
because the tissue came from so many different branchial arches
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