Devo Review Block B Flashcards

1
Q

microstomia-

A

no lower jaw or tongue, tiny mouth. caused by excessive merging of mesenchyme in maxillary mandibular prominences

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2
Q

prosencephalon develops into ______ and _____

A

telencephalon and diencephalon

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3
Q

rhombencephalon develops into _____ and ______

A

metencephalon and myelencephalon

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4
Q

telencephalon derivative

A

cerebral hemispheres

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5
Q

diencephalon derivative

A

thalamus and hypothalamus

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6
Q

mesencephalon derivative

A

midbrain

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7
Q

metencephalon derivative

A

pons and cerebellum

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8
Q

myelencephalon derivative

A

medulla

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9
Q

cervical flexure-

A

level where medulla is continuous with the spinal cord

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10
Q

midbrain flexure-

A

between mesencephalon and prosencephalon

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11
Q

pontine flexure-

A

divides rhombencephalon into myelencephalon and metencephalon

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12
Q

what flexure is responsible for opening up ventricular system?

A

pontine flexure

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13
Q

what keeps the motor and sensory plates separate?

A

sulcus limitans

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14
Q

smooth brain-

A

lissencephalic

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15
Q

anencephaly results when

A

anterior neuropore fails to close

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16
Q

_______ is where anterior neuropore was located developmentally

A

lamina terminalis

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17
Q

microcephaly-

A

small cranial vault

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18
Q

obstructive hydrocephalus in infants can be caused by

A

congenital aqueductal stenosis

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19
Q

skull base is formed via

A

endochondral bone formation

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20
Q

neurocranium is formed via

A

intramembranous bone formation

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21
Q

what fontanelles exist

A

anterior, posterior, mastoid, and sphenoid

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22
Q

what suture may persist in front of skull

A

metopic suture

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23
Q

premature fusion of sutures-

A

craniosynostosis

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24
Q

syndromes associated with craniosynostosis

A

saethre-chotzen, crouzon, apert, pfeiffer

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25
Q

fused saggital suture will result in

A

scaphocephaly

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26
Q

fused metopic suture will result in

A

trigonocephaly

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27
Q

unilateral fused coronal suture will result in

A

plagiocephaly

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28
Q

bicoronal suture fusion will result in

A

turricephaly

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29
Q

lamboid suture fusion will result in

A

plagiocephaly

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30
Q

structures formed from 1st arch cartilage

A

malleus, incus, anterior ligament of malleus, and sphenomandibular ligament

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31
Q

structures formed from 2nd arch cartilage

A

stapes, styloid process, stylohyoid ligament, lesser cornu/superior part of hyoid

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32
Q

structures derived from 3rd arch cartilage

A

rest of the hyoid bone

33
Q

structures derived from 4th/6th arch cartilages

A

laryngeal cartilages (except for epiglottic)

34
Q

muscles derived from 2nd arch

A

stapedius, stylohyoid, posterior belly of diagastric, muscles of facial expression

35
Q

muscles derived from 4th/6th arches

A

cricothyroid, levator veli palatini, constrictors of pharynx, palatoglossus, intrinsic muscles of larynx

36
Q

derivatives of 1st pharyngeal pouch

A

tubotympanic recess, tympanic cavity, mastoid antrum, pharyngotympanic tube

37
Q

derivative of 2nd pharyngeal pouch

A

tonsillar fossa

38
Q

derivates of 3rd pharyngeal pouch

A

thymus and inferior parathyroid gland

39
Q

derivatives of 4th pharyngeal pouch

A

superior parathyroid gland and ultimopharyngeal body

40
Q

thyroid gland comes from

A

endodermal thickening on floor of pharynx (not from 2nd pouch)

41
Q

thyroid ________ begins to descend neck as the thyroglossal duct

A

diverticulum

42
Q

________ from median tongue bud is overgrown by _______

A
  • medial lingual swelling

- lateral lingual swelling from distal tongue buds

43
Q

point of fusion of 2 distal tongue buds-

A

medial sulcus

44
Q

posterior 1/3 of tongue develops from

A

3rd pharyngeal arch

45
Q

what are circumvallate papillae innervated by

A

CN IX

46
Q

what gives rise to epiglottis?

A

rostral part of hypopharyngeal eminence

47
Q

what is the only laryngeal cartilage not formed by the fusion of the 4th and 6th arches

A

epiglottic cartilage

48
Q

type 1 and 2 cysts refer to

A

first branchial cleft cysts

49
Q

second branchial cleft cysts communicate with

A

region of 2nd pharyngeal pouch

50
Q

third branchial cleft cysts pierce the ______ and enters the _______.

A

thyrohyoid membrane and enter the larynx

51
Q

lateral nasal prominence becomes

A

alae of nose

52
Q

median nasal prominences fuse to form

A

intermaxillary segment

53
Q

maxillary prominences are separated from lateral nasal prominence by ________

A

nasolacrimal groove (which will form nasolacrimal duct)

54
Q

if maxillary prominence and lateral nasal prominence dont fuse right, ________ results

A

oblique nasal cleftq

55
Q

stomodeum-

A

opening of future oral cavity

56
Q

most critical period of development of the palate is from when to when?

A

end of 6th week to beginning of 9th week

57
Q

the eye has developmental contributions from what germ layers?

A

neural ectoderm, superficial ectoderm, and mesoderm

58
Q

evagination of the diencephalon

A

optic vesicle

59
Q

2 parts of pars caeca-

A

pars iridica and pars ciliaris

60
Q

mesoderm of eye gives rise to what 4 strucutes?

A

stroma, ciliary body, choroid and sclera

61
Q

what 2 things can be caused by maternal rubella?

A

congenital glaucoma and congenital cataract

62
Q

failure of optic vesicles to form

A

anopthalmia

63
Q

congenital absence of lens

A

aphakia

64
Q

failure of eyelids to form

A

cryptopthalmos

65
Q

the tubotympanic recess from the 1st pouch gives rise to

A

tympanic cavity, pharyngotympanic tube, and mastoid antrum

66
Q

what cartilages give rise to the middle ear bones and muscles?

A

meckel’s and reichart’s

67
Q

what eye structures are generated from both mesoderm and superficial ectoderm?

A

eyelids and cornea`

68
Q

the pigmented layer of the retina stimulates the development of what 2 things

A

choroid and sclera

69
Q

the photosensitive retina stimulates the _____ to become the _____

A

lens vesicle to become the lens

70
Q

the optic vesicle stimulates the _____ to become the _____

A

lens ectoderm to become the lens placode

71
Q

the lens vesicle stimulates the generation of

A

corneal epithelium

72
Q

endoderm from the first pharyngeal pouch will develop into ____

A

tubotympanic recess

73
Q

tubotympanic recess will develop into ____ and ______

A

tympanic cavity (which gives rise to mastoid) and pharyngotympanic tube

74
Q

the mesoderm of the inner ear gives rise to (5)

A

semicircular canals, perilymphatic space, scala vestibuli, scala tympani, and cochlea

75
Q

the mesoderm of the middle ear gives rise to (5)

A

malleus, incus, tensor tympani, stapes, stapedius m.

76
Q

the ectoderm of the inner ear gives rise to the otic pit–> otic vesicle—> 3 things:

A

endolymphatic duct (becomes endolymphatic sac), utricule and saccule

77
Q

utricle gives rise to–>

A

ampullae

78
Q

saccule gives rise to–>

A

cochlear duct