11 & 12 - Embryology of Head and Neck - Stephens

Question 1

condition where there is failure of the occipital and parietal bones to form or close? normally associated with?

Answer 1

cranioschisis; anacephaly (d/t Fetal alcohol syndrome)

Question 2

what are the weeks of facial development?

Answer 2

5-10

Question 3

what membrane disintegrates with formation of the nose?

Answer 3

buccopharyngeal

Question 4

what kind of tissue is the ant 2/3 tongue derived from? innervated?

Answer 4

skin ectoderm; CN V

Question 5

what kind of tissue is the post 1/3 of tongue derived from?

Answer 5

endoderm

Question 6

the 2nd branchial arch gives rise to what kind of muscles?

Answer 6

m. of branchiomeric origin; m. of facial expression

Question 7

what nerve is associated with the 2nd branchial arch?

Answer 7

facial

Question 8

what m. are from arch 1?

Answer 8

m. of mastication

Question 9

derivatives of the frontal nasal prominence are innervated by?

Answer 9

V1

Question 10

maxillary derivatives are innervated by?

Answer 10

V2

Question 11

mandibular prominence derivates innervated by?

Answer 11

V3

Question 12

lateral nasal fails to combine with maxillary =

Answer 12

oblique cleft

Question 13

medial nasal prominence fails to combine with maxillary=

Answer 13

medial cleft lip

Question 14

what are the weeks for development of palate?

Answer 14

5-12

Question 15

what form the secondary palate?

Answer 15

palatine shelves

Question 16

what causes a posterior cleft palate?

Answer 16

failure of palatal shelves don’t come together

Question 17

what week do the branchial arches form and what controls their induction?

Answer 17

week 4; under induction of migratory neural crest cells

Question 18

what structures does the first branchial GROOVE give rise to?

Answer 18

tympanic membrane & external auditory meatus (tympanic cavity & eustachian tube)

Question 19

what nerve is associated with arch 3?

Answer 19

glossopharyngeal nerve

Question 20

what’s the nemonic Mandalyn taught us?

Answer 20

no nemonic just keep repeating “5, 7, 9, 10” = nerves associated with arches

Question 21

what muscles come from 4th/6th arch?

Answer 21

pharyngeal and laryngeal mm.

Question 22

what bones come from arch 1? (main ones high yield or GTFO)

Answer 22

incus, malleus

Question 23

what skeletal structure arch 2?

Answer 23

stapes

Question 24

what does the 2nd branchial pouch give rise to?

Answer 24

palatine tonsils

Question 25

what does the dorsal portion of the 3rd pouch give rise to?

Answer 25

inferior parathyroids

Question 26

what does the ventral portion of the 3rd pouch give rise to?

Answer 26

thymus

Question 27

dorsal portion 4th pouch?

Answer 27

superior parathyroids

Question 28

ventral portion 4th?

Answer 28

ultimobranchial body

Question 29

if there is a bump on the middle of someone’s throat what should you think?

Answer 29

thyroglossal duct cyst

Question 30

bump anterior of SCM think?

Answer 30

lateral cervical cyst

Question 31

what are we gonna do when we get our neuro grades back?

Answer 31

Celebrate, cuz we’re gonna rock this shit!