Development of the Skull, Face and Palate Flashcards Preview

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Flashcards in Development of the Skull, Face and Palate Deck (72)
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31

hypophysal placode gives rise to

rathke's pouch

32

the olfatory placodes give rise to

epithelium of the nasal cavity

33

the ventrolateral placode gives rise to

ganglia of CN VII, IX and X

34

dorsalateral placode gives rise to

otic placodes (membranous labyrinth, spiral and vestibular ganglia)

35

intermediate placode gives rise to

profundal and trigeminal placodes-trigeminal ganglia

36

when does the primary palate begin to from

5th week but is NOT complete till the 12th week

37

primary plate

triangular shape
forms premaxillary part of maxilla
holds incisor teeth

38

when does the secondary palate begin to form

6th week

39

when can anamolies of face and palate be detectected

second trimester

40

acrania

no calvaria, often associated with anencephaly

41

craniosyntosis

premature closure of the sutures- skull with different shapes

42

scaphocephaly

saggital suture closes early- skull is long and narrow

43

oxycepahly

coronal suture closes early, skull is tall

44

plagiocephaly

assymatric close, skull is twisted and can result in dysfunction of cranial nerves IX and X

45

microcephaly

fontanelles close early and sutures close during first year, a CNS defect where the brain and calvaria fail to grow

46

choanal atresia

nasal cavity is NOT continuous with pharynx, blocked by nasal epithelium

47

choanal atresia is part of

CHARGE association

48

CHARGE

coloboma of iris
heart defect
atreasia of chonae
retarded growth
genitourinary anaomaly
ear defect

49

microstomia

excessive merging of maxillary and mandibular prominences

50

cleft lip

only the lip and may be bilateral occurs in various degrees

51

anterior cleft

cleft that involves albeolar part of maxilla, anterior incisive foramen; deficit of maxillary prominence and intermaxillary segment

52

posterior cleft

secondary palate involvement, extends through soft and hard palate, defective development of the secondary palate, mild cases involve ONLY the uvula

53

median cleft

failure of medial nasal prominences to merge and form intermaxillary segmentl characteristic of mohr syndrome

54

median cleft of lower lip

rare; failure of mandibular prominence to fuse

55

oblique facial cleft

from upper lip to medial margin of the orbit

56

cranioschisis

cranial vault fails to form and brain tissue exposed to amniotic fluid degenerates caused by failure of the neuropore to close

57

cartilagenous neurocranium or chondrocraium is derived from

neural crest and paraxial mesoderm

58

difference between positional head deformity and unilambdoid synostosis

for positional head deformity it has isilateral flattening, and frontal bossing and forward ear

for unilambdoid synostis, contralateral bossing, isilateral ear posterior, isilatera flattening

59

cranioschisis

cranial vault fails to form and brain tissue exposed to amniotic fluid degenerates caused by failure of the neuropore to close

59

cranioschisis

cranial vault fails to form and brain tissue exposed to amniotic fluid degenerates caused by failure of the neuropore to close