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Dentistry Module 4 > Pharyngeal Arch Structures > Flashcards

Pharyngeal Arch Structures Flashcards

1
Q

What is the first pharyngeal arch known as?

A

The mandibular arch

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2
Q

How many pharyngeal arches are there?

A

6

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3
Q

What is the second pharyngeal arch known as?

A

Hyoid arch

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4
Q

Which branchial arch disappears very early in development?

A

5

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5
Q

Which pharyngeal arch does not contain any endoderm and is only a continuation of the ectoderm?

A

1st arch

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6
Q

Treacher Collins is an abnormality of which pharyngeal arch?

A

1st arch

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7
Q

Which cleft/groove is exempt of being obliterated by the cervical sinus as the neck develops?

A

1st cleft/groove

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8
Q

Where do pharyngeal membranes appear?

A

On the floor of the pharyngeal grooves

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9
Q

Which is the only pharyngeal membrane to become the tympanic membrane, instead of obliterating like all the others?

A

1st pharyngeal membrane

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10
Q

What is ectopic thymic or parathyroid tissue?

A

A condition where thymus tissue or parathyroid tissue is found in an abnormal location due to failure to migrate completely

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11
Q

Which pharyngeal arch has very little homeobox gene expression?

A

1st pharyngeal arch

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12
Q

What is the blood supply to the mandibular arch?

A

Maxillary artery

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13
Q

What is the blood supply to the pharyngeal arch 3?

A

Internal carotid artery

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14
Q

What is the blood supply to the hyoid arch?

A

Hyoid artery and stapedial artery

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15
Q

What is the blood supply to the pharyngeal arch 4?

A

Right subclavian artery and aorta

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16
Q

What cranial nerve is associated with pharyngeal arch 2?

A

VII, the facial nerve

17
Q

What cranial nerve is associated with pharyngeal arch 3?

A

IX, Glossopharyngeal nerve

18
Q

What cranial nerve is associated with pharyngeal arch 1?

A

V, Trigeminal nerve

19
Q

What cranial nerve is associated with pharyngeal arch 4?

A

X, the vagus nerve

20
Q

What muscles are associated with pharyngeal arch 1?

A
  • muscles of mastication
  • tensor tympani
  • mylohyoid
  • tensor veli palatini
  • anterior belly of digastric
21
Q

What muscles are associated with pharyngeal arch 3?

A
  • stylopharyngeus
22
Q

What muscles are associated with pharyngeal arch 2?

A
  • muscles of facial expression
  • stapedius
  • stylohyoid
  • posterior belly of digastric
23
Q

What muscles are associated with pharyngeal arch 4?

A
  • pharyngeal constrictor
  • soft palate
24
Q

What bones are formed by the mandibular pharyngeal arch?

A
  • malleus
  • incus
25
Q

What ligament is formed by the mandibular pharyngeal arch?

A

Sphenomandibular ligament

26
Q

What cartilage is associated with pharyngeal arch 1?

A

Meckel’s cartilage

27
Q

What bones are formed by the hyoid pharyngeal arch?

A
  • stapes
  • styloid process
  • lesser horn of hyoid
  • part of hyoid body
28
Q

Which ligament is formed by the 2nd pharyngeal arch?

A

Stylohyoid ligament

29
Q

What cartilage is associated with the hyoid pharyngeal arch?

A

Riechart’s cartilage

30
Q

What bones are formed from the 3rd pharyngeal arch?

A
  • greater horn of hyoid
  • part of body of hyoid
31
Q

what cartilages are formed from pharyngeal arch 4?

A

Laryngeal cartilages

32
Q

What structure does the 1st pharyngeal groove form?

A

External auditory meatus

33
Q

What structures does the first pharyngeal pouch form?

A

Middle ear and auditory tube

34
Q

What structures does the second pharyngeal pouch form?

A

Supratonsillar fossa

35
Q

What structures does the third pharyngeal pouch form?

A

Thymus and inferior parathyroid gland

36
Q

What structures does the fourth pharyngeal pouch form?

A

Superior parathyroid gland and post-branchial body

Dentistry Module 4 (20 decks)

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