Brachial Arches

Front 1

contribution of mand and max process to formation of face and oral cavity arise from?

Back 1

pharyngeal (brachial) arches, pharyngeal pouches, branchial celfts (grooves), branchial membranes.

Front 2

each branchial arch has same basic form

Back 2

central carrilaginous rod (skeleton), muscular (branchiomere), vascular (aortic arch), CN

Front 3

significant contributions to dev of head and neck

Back 3

branchial arches, pouches, clefts

Front 4

ectomesenchyme

Back 4

Mesenchcyme derived from neural crest cells after their migration into the branchial arches. supplies skeletal and CT of arch 1,2

Front 5

mesodermal dervied mesenchyme gives rise to?

Back 5

muslce and vascular

Front 6

1st (mandibular) arch to formation of face?

Back 6

1. mandible, max
2. meckel's cartilage: mid ear, spine of sphenoid, ant ligment of malleus, sphenomand ligament
3. muscularture: m. of mastication, mylohyoid, ant digastric, tensor tympani, tensor veli palatini

Front 7

muscles of mastication

Back 7

temporalis, masseter, med lat pterygoids

Front 8

2nd arch (hyoid)

Back 8

contains Reichert's cart, muscles of facial expression, stylohyoid, staedius, post digastric. N: VII

Front 9

reichert's cart:

Back 9

forms hyoid, stapes, styloid process of temp bone, stylohyoid ligmanet.

Front 10

brachial arches separated by what?

Back 10

branchial grooves (clefts) and pharyngeal pouches.

Front 11

brachial membrane

Back 11

grooves and pouches approximate one another. only those associated with 1 and 2 present in adult

Front 12

hyoid operculum

Back 12

The caudal extension of the 2nd branchial arch. Its down growth towards the ridge of the 4th arch creates a transitory space, the cervical sinus

Front 13

cervical (branchial) fistula or cyst formed by what

Back 13

failure to completely elim cervical sinus

Front 14

cervical sinus

Back 14

The transitory cavity formed by the overgrowth of the 2nd branchial arch (hyoid operculum) during the formation of the neck. Normally this structure is completely obliterated.

Front 15

1st pouch contributes to

Back 15

dev ear

Front 16

2nd pouch: ventral and dorsal

Back 16

ventral: obliterated by dev tongue
dorsal: palatine tonsils

Front 17

derivative of 3rd pouch gives rise to

Back 17

thymus, inf parathyroid

Front 18

4th pouch contributes to

Back 18

sup parathyroid, ultimobranchial body (precur of parafollicular cells)

Front 19

1st branchial groove forms

Back 19

ext auditory meatus

Front 20

what contributes to ear in normal position

Back 20

differential growth of face and neck lead to migration of ear to normal position

Front 21

tubotympanic recess

Back 21

middle ear dev from this, whihc is dervied from 1st pouch

Front 22

tympanic membrane (ear drum) is derived from what

Back 22

endo lining of pouch and ecto of 1st groove

Front 23

tuberculum impar

Back 23

unpaired swelling

Front 24

foramen caecum

Back 24

blind pit, marks pt of origin of thyroid => thyroid gland later

Front 25

ant 2/3 of tongue derived from what

Back 25

lat lingual swellings and tuberculum impar merge to provide ectoderm mucuosa

Front 26

copula

Back 26

midventral prominence. derived from 3-4 arches elevate to create prominence

Front 27

post 1/3 of tongue derived from what

Back 27

3-4 arches elevate to form copula which later beccomes

Front 28

sulci terminalis

Back 28

V shape depression, division btw 1st arch and 3-4 arch dervied mucosa in adult

Front 29

muscles of tongue arise from what

Back 29

floor of pharynx opp to origin of hypoglossal N.

Front 30

intrinsic muscles of tongue N?

Back 30

CN XII

Front 31

ant 2/3 of tongue N by

Back 31

lingual N. mandib division of CN V

Front 32

post 1/3 of tongue N by

Back 32

glossopharyngeal N

Front 33

epiglottis N by

Back 33

vagus N

Front 34

N of taste buds in post 1/3 of tongue and pharynx

Back 34

mixed CN IX, X

Front 35

placode

Back 35

oval shaped thickening of ectorderm

Front 36

cleft palate formed by what

Back 36

max processes didn't join with middle portions of face (bilateral)

Front 37

FNP becomes

Back 37

forehead

Front 38

MNP becomes

Back 38

central nose and central upp lip

Front 39

LNP becomes

Back 39

wings of nose

Front 40

nasal placode forms what when grows forward

Back 40

nasal cavity

Front 41

ant 2/3 tongue formed from

Back 41

1 arch, CN V

Front 42

post 1/3 tongue formed from

Back 42

3: post 1/3. CN IX
4: little tongue, epipglottis CN X

Front 43

muscles of tongue formed from

Back 43

post occ soma. CN XII