Flashcards in CFD6- Development of the face and maxilla Deck (49)
what is the front-nasal process?
Prominence in the upper facial area at the most cephalic end of the embryo
what is the cephalic end?
Head end of a structure such as the trilaminar embryonic disc
what are the mandibular processes?
Processes of first branchial arch that fuse at the midline to form mandibular arch
what is the mandibular arch?
Lower dental arch with mandibular teeth or the 1st Branchial/Pharyngeal arch inferior to the stomodeum in the embryo
what are the maxillary processes?
Prominence from mandibular arch that grows superiorly and anteriorly on each side of the stomodeum of the embryo
what is the maxillary arch?
Upper dental arch in which the maxillary teeth form
what is the nasal placode?
Placodes that develop into olfactory organ for the sensation of smell located in the mature nose
what is the placode?
Area of ectoderm found at the location of the developing special sense organs on the embryo
when does development of the face start?
where does the face begin to develop?
squeezed between the brain and developing heart
what layers are involved in facial development?
all 3 embryonic layers
what are the five facial processes?
-2 paired maxillary
-2 paired mandibular
what is "fusion"?
-"fusion" of prominences by elimination of furrow
-between medial nasal prominences
what is true fusion?
True fusion of separate processes between medial nasal prominence and maxillary process
what is a result if true fusion does not occur?
what membrane disintegrates in the stomodeum?
what chamber is formed?
what is the primary palate?
– from the fused medial nasal prominence (intermaxillary segment)
– does not separate oral and nasal cavities - demarcates
where are placodes located?
all on the same level
How do the eyes move during development of the face?
move from the side of the face inwards
How does the maxillary process develop?
develop across and fill the gap
at 7 weeks , what stage is development at?
true fusion has occurred and this is the flat face
what happens at 10 weeks?
all structures are fully formed and now cartilage and bone will be laid
what has formed at the 4th week?
– primitive stomodeum bounded by
– FNP, max. and mand. process
– nasal placodes, develop into nasal pits
what has formed at the 5th week?
– nasal pit surrounded by lateral + medial nasal
what has formed at the 6th and 7th week?
Medial nasal prominences fuse together and fuse with maxillary processes
what is the frontonasal contributions to the face?
forehead, bridge of nose
what is the medial nasal contributions to the face?
philtrum of the lip, crest and tip of nose
what is the lateral nasal contributions to the face?
alae of nose