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ARCOS BRANQUIALESFORMACIÓN DE ESTRUCTURAS FACIALES
Y DE LA CAVIDAD BUCAL
Dr. FERNANDO ROMERO GARZÓN.
Histología Bucal
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EL DESARROLLO DE LA CABEZA
COMPRENDE DOS PORCIONES
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6SEM
5 SEM
7 SEM
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La característica mas típica del desarrollo
de la cabeza y cuello es la formación de
los arcos faríngeos ó branquiales, estos
aparecen en la cuarta y quinta semana de
desarrollo.
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Arcos Faríngeos
Cada arco faríngeo se caracteriza por
tener sus propios componentes
musculares, con su propio nervio
craneal, sus componentes esqueléticos y
sus componentes arteriales.
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Los músculos de los diferentes arcos no
siempre se adhieren a los componentes
óseos de su propio arco, si no que a
veces emigran hacia regiones adyacentes.
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Musculatura
Óseo
Nervio
Los de la masticación
(temporal, masetero, pterigoideo
interno y externo).
Milohiodeo, tensor del velo del
paladar y tensor del tímpano.
Primer
Arco
Branquial
Cartílago de Meckel que dará
origen a yunque, martillo. porción
del maxilar inferior y ligamento
esfeno-mandibular.
V. Rama maxilar inferior del
nervio trigémino.
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Musculatura
Óseo
Nervio
De la expresión facial:
buccinador, auricular, frontal, cután
eo del cuello orbicular de los labios
y párpados. Vientre posterior del
digástrico, estilohiodeo y estribo.
Segundo
Arco
Branquial
Estribo, apófisis
estiloides, ligamento
estilohiodeo, asta menor y
porción superior del cuerpo del
hioides.
VII. Facial
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Musculatura
Óseo
Nervio
Músculos estilofaríngeos
Tercer
Arco
BranquialPorción inferior del cuerpo y asta
mayor del hioides.
IX. Glosofaríngeo.
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Musculatura
Óseo
Nervio
Cricotiroideo, elevador del paladar
y constrictores de la faringe.
4, 5 Arco
Branquial Cartílagos de la laringe:
tiroides, cricoides, aritenoides, co
rniculado y cuneiforme.
X. Vago: rama laríngea
superior (hacia el 4 arco).
Rama laríngea inferior (hacia
el 6).
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28 días
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32 días
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40 días
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42días
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44días
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48días
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51días
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54días
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56días
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Estomodeo
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PALATOGÉNESIS
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FORMACIÓN DE LA LENGUA
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Cuando se juntan las porciones anterior y
posterior se forma un surco en forma de
“V” que es llamado surco terminal.
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