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NS40: 1st Pharyngeal arch (Muscles (temporalis, masseter, lat + med…
NS40: 1st Pharyngeal arch
bones
dorsal
maxilla
zygoma
part of temporal
ventral
malleus
incus
`meckel's cart
part of mandible
ligaments
sphenomandibular lig
ant lig of malleus
N = V3
Muscles
temporalis
masseter
lat + med pterygoids
mylohyoid
ant belly of digastric
tensor palati
tensor tympani
art = maxillary
ant 2/3 of tongue
defects
jaw + ear problems
mandibulofacial dystosis (Treacher Collins Syndrome)
AD, but 60% due to de novo mutations (can be caused environmentally)
Pierre Robin Sequence
micrognathia (poor mandible growth)
cleft palate
glossoptosis (tongue failed to fall between palatal shelves)