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Undeleted > Head and neck dev > Flashcards

Head and neck dev Flashcards

1
Q

membrane that will become mouth

A

oropharyngeal membrane

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2
Q

ant. space similar to proctodeum

A

stomatodeum

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3
Q

cause of dev. of frontonasal prominence

A

proliferation of mesoderm and neural crest cells

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4
Q

organs derived by mesoderm and neural crest cells

A

mesoderm- skeletal muscle and epithelial cells

crest cells- bone and connective tissue of face and ganglia of head and neck

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5
Q

number of arches back from prominence

A

6

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6
Q

contents of each arch (4)

A
  1. artery
  2. cartilege
  3. muscle
  4. cranial nerve
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7
Q

portions that dev into face and palate

A

frontonasal prominence and 1st arch

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8
Q

divisions of 1st arch

A

maxiallary and mandibular prominences

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9
Q

pit in between all the prominences

A

stomatodeum

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10
Q

what will become the nose

A

olfactory placodes>olfactory pits

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11
Q

what is formed from mandibular prom

A

jaw

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12
Q

what creates primary palate

A

medial nasal prominence

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13
Q

separation between lat nasal and max prominence

A

nasolacrimal groove > nasolacrimal duct

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14
Q

derivatives of frontonasal prominence

A

forehead, nasal bridge, nasal sept

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15
Q

derivatives of medial nasal prom

A

primary palate, philtrum of upper lip, tip of nasal septum

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16
Q

derivatives of lat nasal prom

A

ala of nose

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17
Q

derivatives of max prom

A

maxilla and lat upper lip

18
Q

derivatives of mandibular priom

A

jaw and lower lip

19
Q

prob with medial nasal and max fusion

A

cleft lip

20
Q

prob with max and mandibular fusion

A

macrostomia

21
Q

prob with lat nasal and max fusion

A

oblique facial cleft

22
Q

2 sources of palate

A
  1. medial nasal - promiary palate (ant.)

2. palatal process of maxilla - post palate including soft

23
Q

arch # and corresponding cranial nerve

A

1 - 5
2 - 7
3 - 9
4 - 10

24
Q

prominences developed by trigeminal

A

V1 - frontonasal
V2 - maxiallary
V3 - mandibular

25
Q

external and internal division of arches

A

external - pharyngeal grooves

internal - pharyngeal pouch

26
Q

fate of 4 pharyngeal grooves

A
  1. becomes auditory meatus

2-4. covered by caudal drift of 2nd arch to become cervical sinuses

27
Q

fate of 4 pharyngeal pouches

A
  1. middle ear chamber and auditory tube
  2. palatine fossa
  3. ventral - thymus, dorsal - inf parathyroid glands
  4. dorsal - sup parathyroid glands, ventral become calcitonin secreting aspect of thyroid
28
Q

tissues creating tympanic membrane

A

ectoderm of 1st pharyngeal groove meeting endoderm of 1st pharyngeal pouch

29
Q

fate if cartilage of 4 arches

A
  1. Meckle’s - mandible, sphenomandibular ligament, malleus, incus
  2. Reicherts - stapes, styloid process, lesser horn of hyoid
  3. greater horn of hyoid
  4. laryngeal cartiledges
30
Q

muscles of 4 arches

A
  1. muscles of mastication, mylohyoid, anterior digastric, tensor tympani, tensor palatini
  2. muscles of facial expresion, posterior digastric, stylohyoid, stapedius
  3. stylopharyngeus
  4. levator palatini, muscles of pharynx and larynx
31
Q

arteries of the 4 arches

A
  1. none
  2. none
  3. common carotids and proximal internal carotid
  4. left- aortic arch, right - subclavian
  5. none
  6. pulmonary arteries
32
Q

point of origin of thyroid

A

b/w 1 and 2 arches

33
Q

point of dev of pit cland (2)

A

ant. - ectoderm in roof of stomatodeum

post - outgrowth of neuroectoderm of neural tune near hypothalamus

34
Q

arches where tongue develops from

A

ant 2/3 - 1st arch (trigeminal)
post 2/3 - 3 and 4 (glosso and vagus)
skeletal muscle from somites

35
Q

arteries of the 4 arches

A
  1. none
  2. none
  3. common carotids and proximal internal carotid
  4. left- aortic arch, right - subclavian
  5. none
  6. pulmonary arteries
36
Q

point of origin of thyroid

A

b/w 1 and 2 arches

37
Q

point of dev of pit cland (2)

A

ant. - ectoderm in roof of stomatodeum

post - outgrowth of neuroectoderm of neural tune near hypothalamus

38
Q

arches where tongue develops from

A

ant 2/3 - 1st arch (trigeminal)
post 2/3 - 3 and 4 (glosso and vagus)
skeletal muscle from somites

39
Q

tissue source for thyroid

A

endoderm b/w arches

40
Q

which pouch becomes ant. pit

A

rathkes pouch (ectoderm)

41
Q

time thyroid reaches final position

A

7th week

42
Q

passage through which thyroid descends

A

thyroglossal duct (midline)

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