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Flashcards in Development of Head and Neck Deck (32):
1

The parietal and occipital bones are made up of which embryological tissue?

Paraxial mesoderm

2

Frontal, temporal, sphenoid, maxilla and mandibular bones are made up of which embryological tissue?

Neural crest cells

3

The laryngeals are made up of which embryological tissue?

Lateral plate mesoderm

4

Which embryological tissue forms the pharyngeal arch cores?

Paraxial mesoderm

5

How many pharyngeal arches are there?

Five - 1,2,3,4,6 - 5 obliterates

6

Where are pharyngeal pouches found?

Inside

7

Where are pharyngeal clefts found?

outside

8

What embryological tissue forms the pharyngeal clefts?

Ectoderm

9

What embryological tissue forms the pharyngeal pouches?

Endoderm

10

What skeletal structures does A1 form?

Bones of the middle ear and meckle's cartilage (mandible)

11

What skeletal structures does A2 form?

Styloid and styloid process

12

What skeletal structures does A3 form?

Hyoid bone

13

What skeletal structures does A4 and A6 form?

The neck cartilages (cricoid and thyroid)

14

What is the cranial nerve innervation for A1?

Trigeminal V - V1/V2/V3

15

What is the cranial nerve innervation for A2?

CN VII - Facial

16

What is the cranial nerve innervation for A3?

CN XI - Glossopharyngeal

17

What is the cranial nerve innervation for A4?

CN X - Superior laryngeal branch

18

What is the cranial nerve innervation for A6?

CN X - Recurrent laryngeal branch

19

Which pharyngeal arch arteries form the brachiocephalic trunk?

Right 4 and 6

20

Which pharyngeal arch arteries form the ascending aorta?

Left 4

21

Which pharyngeal arch arteries form the pulmonary trunk?

Left 6

22

Which pharyngeal arch arteries form the left common carotid?

Left 3

23

What is the fate of pharyngeal arch 1?

Splits in to the mandible and maxilla

24

What is the fate of pharyngeal pouch 1?

Tympanic cavity and auditory tube

25

What is the fate of pharyngeal membrane 1?

Tympanic membrane

26

What is the fate of pharyngeal cleft 1?

External auditory meatus

27

What is the fate of pharyngeal pouch 2?

Palatine tonsil

28

What is the fate of pharyngeal pouch 3?

Thymus and inferior parathyroid gland

29

What is the fate of pharyngeal pouch 4?

Superior parathyroid gland

30

Failure of obliteration of the Pharyngeal clefts 2/3/4 can lead to which condition forming within the cervical sinus?

Branchial cyst

31

Failure of fusion between the mandibular and maxillary processes can lead to which condition?

Cleft lip

32

Failure of fusion between the left and right palatal processes and the primary palate can lead to which condition?

Cleft palate