4. tracto uveal
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Transcript of 4. tracto uveal
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Dra. Eskania Iraisa Viola Mora
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Capa media
Muy vascularizada
Unida fuertemente a:
Espolón escleral
Salida de las venas vorticosas
Nervio óptico
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Tracto Uveal
Iris Cuerpo Ciliar
Coroides
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Extensión anterior
Formado por:
Vasos sanguíneos
Tejido conectivo
Melanocitos
Células pigmentadas
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Estroma
Cel. Pigmentadas
Cel. no pigmentadas
Fibrillas de colágeno
Matriz con Ac. Hialuronico
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Vasos y nervios
Forman la mayor parte del estroma
Trayecto radial
Circulo arterial mayor → centro de la pupila
Collarete
Circulo arterial menor
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Capa pigmentada posterior
Aspecto liso, aterciopelado, uniforme
Superficie basal → cámara posterior
Superficie apical → estroma
Capa pigmentada anterior
Collar pupilar
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Musculo dilatador
Origen neuroectodermico
Paralelo y anterior al EPP
Miofibrillas y melanosomas
Inervación
Simpática alfa 1 adrenérgica
Parasimpática colinérgica
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Cadena simpática
N. 1er orden
Hipotálamo posterolateral ipsolateral
N. preganglionar de 2 do orden
Sale de la medula espinal
Sinapsis en el ganglio cervical superior
N. posganglionar 3er orden:
plexo de la carótida interna
R. oftálmica
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Musculo esfínter
Origen neuroectodermico
Banda circular, musc. Liso
Borde pupilar
Estroma profundo
Inervación parasimpática muscarinicas
Núcleo de Edinger-Westphal
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Forma triangular
Vértice - Ora Serrata
Base – inserción de la raíz
del Iris
Cara anterosuperior
Cara posteroinferior
Funciones
Formación de humor acuoso
Acomodación de cristalino
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Porciones
París plana
Zona pigmentada
Lisa
Relativamente avascular
4 mm de anchura
Ora serrata → procesos ciliares
Abordaje mas seguro a cavidad vítrea
3-4 mm del limbo
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Porciones
Pars plicata
Muy vascularizada
70 procesos ciliares
Vascularizado por arteriolas
procedentes del circulo arterial mayor
Drenado por vénulas grandes
Musculo liso arteriolar
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Epitelio
No pigmentado
Humor acuoso y epitelio pigmentario
Unido estrechamente en la porción apical
Zónula de oclusión
Barrera hematoacuosa
M.B
Multilaminar
Delimita cámara posterior
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Epitelio
Pigmentado
Cel. Cuboides y columnares
Invaginaciones
Núcleos grandes
Mitocondrias
Melanosomas
Retículo endoplasmico
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Porción uveal
Capilares fenestrados
Fibrillas de colágeno
Fibroblastos
Vascularización
C. anteriores y posteriores largas
Plexo arterial epiescleral, intramuscular, plexo arterial mayor
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Musculo ciliar
Longitudinal (de Brucke)
Radial
Circulares ( de Muller - Rouget)
Inervación procedente de las fibras
parasimpáticas de III par craneal
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Porción posterior
0,25 mm de grosor
Tres capas
Coriocapilar
Capa de vasos pequeños
Capa de vasos grandes
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Irrigación
A. ciliares posteriores largas
A. ciliares anteriores perforantes
Drenaje
Sistema vorticoso
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Membrana de Bruch
Fusión de la MB del EPR y la coriocapilaris
Consta de cinco elementos
MB del EPR
Zona colágena interna
Banda de fibras elásticas
Zona colágeno externa
MB de la coriocapilaris
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San
francisco, 2011-2012
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Coriocapilaris
Capa de capilares grandes
Paredes finas con fenestraciones
Patrón lobulillar
Arteriola precapilar
Vénula post-capilar
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Lente biconvexa
Detrás de CP y la pupila
Carece de inervación
Es avascular
20 D
Diámetro ecuatorial al nacimiento:
6,5 mm
9-10 mm en adultos
3-6 mm de anchura ant-posterior
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Acomodación
Contracción del musculo ciliar
Relajación Zónular
Forma globular
12-16 D acomodarías en el adolescente
2 D a los 50 anos
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Capsula
MB del epitelio cristaliniano
Colágeno tipo IV
Anterior: 15,5 micras
Posterior: 2,8 micras
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Epitelio
En el ecuador debajo de la capsula anterior
Núcleo prominente
Pocas organelas
Zonas
Central
Intermedia
Germinativa
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-
2012
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American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Fibras
Núcleo
Formado en el momento de el nacimiento
Corteza
Se añaden después del nacimiento
American Academy of Ophtalmology. Basic and clinical
science curse. Section 2, pag.61-79. San francisco, 2011-2012
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Zónula
Se originan en la MB del ENP
Se unen a la capsula por delante
y por detrás del ecuador
Formadas por filamentos de
fibrilinas
American Academy of Ophtalmology. Basic and clinical science curse. Section 2, pag.61-79. San francisco, 2011-2012
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