Brachial Apparatus High Yield Flashcards Preview

Step 1 Review > Brachial Apparatus High Yield > Flashcards

Flashcards in Brachial Apparatus High Yield Deck (35):
1

What are brachial clefts derived from?

ectoderm

2

What do brachial arches arise from?

mesoderm (muscles, arteries) and Neural crest (bones, cartilage)

3

What do brachial pouches arise from?

endoderm

4

External auditory meatus is a derivative of....

1st brachial cleft

5

What allows for a brachial cleft cyst within lateral neck?

persistent cervial sinus

6

Mandible is derived from...

1st brachial arch

7

What are the nerves associated with the 1st brachail arch?

V2 and V3

8

Stapes is derived from...

2nd brachial arch

9

Malleus is derived from...

1st brachial arch

10

Nerves associated with 3rd brachial arch?

CN IX

11

Thyroid cartilage is derived from...

4th-6th brachial arches

12

Nerves associated with the 2nd brachial arch?

CN VII

13

Mandibular ligament is derived from...

1st brachial arch

14

Stylohoid is derived from...

2nd brachial arch

15

Cricoid cartilage is derived from...

4th- 6th brachial arch

16

What nerve is associated with the 4th brachial arch?

CN X--> superior laryngeal branch (swallow)

17

What nerve is associated with the 6th brachial arch?

CN X--> recurrent laryngeal branch (speak)

18

The intrinsic muscle of the larynx (except cricothyroid) is derived from....

the 6th brachial arch

19

The lesser horn of the hyoid is derived from...

the 2nd brachial arch

20

The muscles of mastication are derived from...

the 1st brahcial arch

21

What is the stylopharngeus muscle derived from?

3rd brachial arch

22

What is the tensor tympani derived from?

1st brachial arch

23

What is treacher collins syndrome?

1st arch neural crest fails to migrate--> mandibular hypoplasia, facial abnormalities

24

Levator veli palatini is derived fro...

4th brachail arch

25

What are the oharyngeal constricutors derived from?

4th brachial arch

26

What are the muscles of facial expression dervied from?

2nd brachial arch

27

Cricothyroid is derived from...

4th brachial arch

28

WHat is the middle ear derived from?

1st brachial pouch

29

The epithelial lining of the palatine tonsil is derived from...

2nd brachial pouch

30

the parathyroids are derived from...

interior--> 3rd brachial pouch

superior--> 4th brachial pouch

31

The thymus is derived from..

the 3rd brachial pouch

32

The eustachian tube is derived from...

1st brachial pouch

33

The mastoid air cells are derived from...

1st brachial pouch

34

"T cell deficiency + hypocalcemia + cardiac defects"

DiGeorge syndrome (aberrant development of the 3rd and 4th pouches)

35

What pharyngeal pouches are associated with MEN 2A

Parathyroid tumor--> 3rd and 4th brachial pouch

Parafollicular thyroid cells (medullary thyroid cancer)--> neural crest cells--> 4th adn 5th pharyngeal pouches

Decks in Step 1 Review Class (62):