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4 Craniofacial biology > Pharyngeal Arches > Flashcards

Pharyngeal Arches Flashcards

(49 cards)

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1
Q

Pharyngeal arches appear ? weeks as ??? migrate into the head and neck region

A

in 4th and 5th
neural crest cells

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2
Q

Maxilla and mandible form from the ? pharyngeal arch: ?? that differentiates into bone

A

1st
Meckel’s cartilage

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3
Q
A

maxillary process

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4
Q
A

mandibular arch

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5
Q
A

pharyngeal arches

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6
Q
A

frontonasal prominence

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7
Q
A

stomatodeum

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8
Q

what is the stomatodeum?

A

developing oral cavity

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9
Q
A

pharyngeal arches

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10
Q
A

cardiac swelling

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11
Q

the pharyngeal arches only form what?

A

the face, nasal cavities, the mouth, the larynx, pharynx and neck

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12
Q

In week ? the ? pharyngeal arch enlarges and overgrows the ? and ? arches forming an ?? called the ??

A

5
2nd
3rd
4th
ectodermal depression
cervicular sinus

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13
Q

End of week ? the ?, ? and ?pharyngeal grooves and ?? disappear giving a ??

A

7
2nd
3rd
4th
cervical sinus
smooth contour

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14
Q

remember
Typical pharyngeal arch contains

Ectoderm - outside

Endoderm - inside EXCEPT 1st arch

Aortic arch - artery that arises from the trunk of the primordial heart

Cartilaginous rod - forms the skeleton of the arch

Muscular components - differentiates into the muscles of the head and neck

Nerve - supplies the mucosa and muscles derived from the arch

A
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15
Q

what determines which type of neural crest cell develop and migrate into the pharyngeal arches?

Different neural crest cells in each pharyngeal arch leading to different developments

A

homeobox genes

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16
Q

remember

A
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17
Q

what is the name of the 1st pharyngeal arch?

A

mandibular arch

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18
Q

what cartilage is in the 1st pharyngeal arch?

A

meckel’s cartilage

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19
Q

what bones develop from the 1st pharyngeal arch?

A

incus and malleus

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20
Q

what muscles develop from the 1st pharyngeal arch?

Study These Flashcards
A

of mastication and anterior belly of digastric

21
Q

what ligaments develop from the 1st pharyngeal arch?

Study These Flashcards
A

sphenomandibular and sphenomalleolar

22
Q

what nerve develops from the 1st pharyngeal arch?

Study These Flashcards
A

CNV - trigeminal nerve

23
Q

what artery develops from the 1st pharyngeal arch?

24
Q

what occurs from a 1st pharyngeal arch abnormality?

Study These Flashcards
A

treacher collins syndrome

25
what is the 2nd pharyngeal arch called?
hyoid arch
26
what cartilage develops from the 2nd pharyngeal arch?
Reichert's cartilage
27
what bones develop from the 2nd pharyngeal arch?
stapes, lesser horn and body of hyoid, styloid process
28
what ligaments develop from the 2nd pharyngeal arch?
stylohyoid ligament
29
what muscles develop from the 2nd pharyngeal arch?
muscles of facial expression and posterior belly of digastric
30
what arteries develop from the 2nd pharyngeal arch?
hyoid artery and stapedial artery
31
what nerve develops from the 2nd pharyngeal arch?
CNVII - facial nerve
32
what bones develop from the 3rd pharyngeal arch?
greater horn of hyoid, body of hyoid
33
what muscles develop from the 3rd pharyngeal arch?
stylopharyngeus
34
what nerve develops from the 3rd pharyngeal arch?
CNIX - glossopharyngeal
35
what artery develops from the 3rd pharyngeal arch?
internal carotid
36
what arteries develop from the 4th pharyngeal arch?
right subclavian artery and aorta
37
what nerve develops from the 4th pharyngeal arch?
Vagus nerve
38
what muscles develop from the 4th pharyngeal arch?
pharyngeal and laryngeal muscles
39
what bones develop from the 4th pharyngeal arch?
laryngeal cartilages
40
between the arches there are pouches what does the 1st pouch form?
middle ear
41
between the arches there are pouches what does the second pouch form?
supratonsillar fossa
42
between the arches there are pouches what does the third pouch form?
thymus and inferior parathyroid gland
43
between the arches there are pouches what does the 4th pouch form?
superior parathyroid gland and post-branchial body
44
a Branchial fistula/cyst on SCM muscle is a result of what?
2nd arch fails to grow
45
ectopic thymic or parathymic tissue is a result of what?
parathyroid tissue doesn’t migrate, parathyroid gland closer to the mouth
46
what does the 1st and 2nd pharyngeal groove turn into?
external auditory meatus
47
what does the 2nd, 3rd, and 4th pharyngeal groove temporarily turn into?
cervical sinus -> temporary
48
understand this overview
49
understand this overview

4 Craniofacial biology (20 decks)

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