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43 Cards in this Set

  • Front
  • Back
contribution of mand and max process to formation of face and oral cavity arise from?
pharyngeal (brachial) arches, pharyngeal pouches, branchial celfts (grooves), branchial membranes.
each branchial arch has same basic form
central carrilaginous rod (skeleton), muscular (branchiomere), vascular (aortic arch), CN
significant contributions to dev of head and neck
branchial arches, pouches, clefts
ectomesenchyme
Mesenchcyme derived from neural crest cells after their migration into the branchial arches. supplies skeletal and CT of arch 1,2
mesodermal dervied mesenchyme gives rise to?
muslce and vascular
1st (mandibular) arch to formation of face?
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
muscles of mastication
temporalis, masseter, med lat pterygoids
2nd arch (hyoid)
contains Reichert's cart, muscles of facial expression, stylohyoid, staedius, post digastric. N: VII
reichert's cart:
forms hyoid, stapes, styloid process of temp bone, stylohyoid ligmanet.
brachial arches separated by what?
branchial grooves (clefts) and pharyngeal pouches.
brachial membrane
grooves and pouches approximate one another. only those associated with 1 and 2 present in adult
hyoid operculum
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
cervical (branchial) fistula or cyst formed by what
failure to completely elim cervical sinus
cervical sinus
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.
1st pouch contributes to
dev ear
2nd pouch: ventral and dorsal
ventral: obliterated by dev tongue
dorsal: palatine tonsils
derivative of 3rd pouch gives rise to
thymus, inf parathyroid
4th pouch contributes to
sup parathyroid, ultimobranchial body (precur of parafollicular cells)
1st branchial groove forms
ext auditory meatus
what contributes to ear in normal position
differential growth of face and neck lead to migration of ear to normal position
tubotympanic recess
middle ear dev from this, whihc is dervied from 1st pouch
tympanic membrane (ear drum) is derived from what
endo lining of pouch and ecto of 1st groove
tuberculum impar
unpaired swelling
foramen caecum
blind pit, marks pt of origin of thyroid => thyroid gland later
ant 2/3 of tongue derived from what
lat lingual swellings and tuberculum impar merge to provide ectoderm mucuosa
copula
midventral prominence. derived from 3-4 arches elevate to create prominence
post 1/3 of tongue derived from what
3-4 arches elevate to form copula which later beccomes
sulci terminalis
V shape depression, division btw 1st arch and 3-4 arch dervied mucosa in adult
muscles of tongue arise from what
floor of pharynx opp to origin of hypoglossal N.
intrinsic muscles of tongue N?
CN XII
ant 2/3 of tongue N by
lingual N. mandib division of CN V
post 1/3 of tongue N by
glossopharyngeal N
epiglottis N by
vagus N
N of taste buds in post 1/3 of tongue and pharynx
mixed CN IX, X
placode
oval shaped thickening of ectorderm
cleft palate formed by what
max processes didn't join with middle portions of face (bilateral)
FNP becomes
forehead
MNP becomes
central nose and central upp lip
LNP becomes
wings of nose
nasal placode forms what when grows forward
nasal cavity
ant 2/3 tongue formed from
1 arch, CN V
post 1/3 tongue formed from
3: post 1/3. CN IX
4: little tongue, epipglottis CN X
muscles of tongue formed from
post occ soma. CN XII