Development of the Skull, Face and Palate Flashcards Preview

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Flashcards in Development of the Skull, Face and Palate Deck (72):
1

what does the skull develop from ?

mesenchyme

2

neurocrainium is

around the brain

3

viscerocranium

is the skeleton around the face

4

what are the two parts of the neurocranium ?

cartilagenous and memranous parts

5

what process forms the bones of the skull

endochondral ossification

6

what type of cartilage gives rise to the ethmoid bone ?

prechordal cartilage

7

parachordal cartilage gives rise to

occipital bone

8

hypophysial cartilage gives rise to

forms around the pituitary gland

9

ethmoid, nasal, lacrimal, and inferior concha are formed from

olfactory capsules

10

petrous and mastoid parts of petrous bone are formed by

otic capsule

11

forms the greater and lesser wings of the sphenoid

optic capsule

12

the membranous neurocranium is derived from

neural crest cells

13

what process forms the neurocranium

intermembranous ossification

14

the membranous viscerous cranium is from

the first arch and neural crest cells

15

membranous neurocranium forms what bones

frontal, parietal, sqaumous part of temporal and portion of occipital

16

viscerocranium froms what vones

squamous temporal, maxillary and zygomatic bones and most of the mandible

17

cartilagenous viscerocranium is from what

first and second arches via endochondral ossification

18

first arch forms

malleus and incus and parts of mandible

19

second arch forms

stapes, lesser horn, and superior part of hyoid bone

20

third arch forms

greater horns and inferior part of hyoid bone

21

fourth and third arch form

epiglottis

22

what forms the laryngeal cartilages

fourth and sixth arches

23

when does the development of the face begin ?

4th week

24

what does the development of the face rely on

organizing centers related to the forebrain

25

face develops around what structure

stomadeum

26

the nasolacrimal duct forms from _______of the nasolacrimal groove

ectoderm

27

______________ are not present at birth but develop in early life by the eroding of bone

paranasal sinuses

28

what do the neural crest cells that remain in the surface ectoderm form

neuroepithelium

29

what do the nerual crest cells taht remain in the surface ectoderm help give rise to

ectodermal placodes

30

ectodermal placodes will form what

neural tissue along with the lens of the eye

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

60

cartilagenous neurocranium or chondrocraium is derived from

neural crest and paraxial mesoderm

60

cartilagenous neurocranium or chondrocraium is derived from

neural crest and paraxial mesoderm

61

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

61

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

62

cranioschisis

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

63

cartilagenous neurocranium or chondrocraium is derived from

neural crest and paraxial mesoderm

64

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

65

the frontal nasal prominence gives rise to

forehead, bridge of nose, medial and lateral nasal prominences

66

maxillary prominence gives rise to

cheeks, lateral portion of upper lip

67

medial nasal prominence gives rise to

philtrum of upper lip, crest, and tip of nose

68

lateral nasal prominence gives rise to

alae of nose

69

mandibular prominence give rise to

lower lip