Development of the Head and Neck Flashcards Preview

Block 6 > Development of the Head and Neck > Flashcards

Flashcards in Development of the Head and Neck Deck (24):
1

What forms the upper half of the atlas and the occipital bone?

scelerotomes

2

What forms the muscles of the tongue and the muscles of the neck?

myotomes

3

What innervates the muscles of the tongue? The muscles of the neck?

hypoglossal nerve, cervical spinal nerve

4

In the __ the __ week the development of most of the head and neck structures occur. At this point, the ____ arches are present.

4th to 5th week

pharyngeal arches

5

Which arch forms the dorsal maxillary process and the ventral mandibular process?

first arch

6

The first arch is also called the what?

mandibular arch

7

The second arch is also called the what?

hyoid arch

8

The third arch is for what muscle, bone, and nerve?

-stylopharyngeus
-greater cornu of hyoid and lower part of body of hyoid
-glossopharyngeal

9

What pouch forms the proximal auditory tube, the distal middle ear tympanic cavity, and the TM?

the first pouch (pharyngeal pouch)

10

What pouch forms the palatine tonsils, lymphatic tissue, and tonsillar fossa?

second pouch

11

What pouch forms the inferior parathyroid gland and the thymus?

third pouch

12

What pouch forms the superior parathyroid gland and the ultimobranchial body?

fourth pouch

13

DiGeorge syndrome is a failure of differentiation of the__ and ___ pouches. Infants are born without ___ and ____ glands. Facial abnormalities, thyroid hypoplasia, congenital hypoparathyroidism and cardiac abnormalities. Microdeletion in chromosome ___.

3rd and 4th pouches
thymus and parathyroid glands
chromosome 22

14

Which cleft(s) become the cervical sinus that disappears over time?

2nd, 3rd, 4th

15

Only 4 cranial nerves are neural crest derived, what are they?

5, 7, 9, 10

16

Incomplete fusion of two medial nasal prominences. Deep groove seen between two halves of nose. Dx?

median cleft lip

17

Partial or complete lack of fusion of maxillary prominences with one or both medial nasal prominences. Dx?

lateral cleft lip
-can be uni- or bilat

18

What separates maxillary prominences from lateral nasal prominences?

nasolacrimal groove

19

Failure of maxillary prominence to fuse with lateral nasal prominence. Nasolacrimal duct is exposed. Dx?

oblique facial cleft

20

Tongue is not free from mouth. The frenulum anchors tongue. In most common form the frenulum extends to the tup of the tongue. Dx?

ankyloglossia (tongue tie)

21

If a there is a cleft that involves both the lip and the palate is it a cleft lip or a cleft palate diagnosis?

cleft palate

22

Lack of fusion between primary and secondary palates. Dx?

cleft palate (anterior)

23

Lack of fusion of palatine shelves, occurs frequently in females, anticonvulsant drugs during pregnancy increase the risk. Dx?

cleft palate (secondary)

24

Uvula has a fish tail appearance. Dx?

cleft uvula