{"id":71630,"date":"2004-02-12T00:00:00","date_gmt":"2004-02-12T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/variabilidad-en-la-sensibilidad-corneal-y-conjuntival-a-estimulos-mecanicos-y-quimicos-con-la-edad\/"},"modified":"2004-02-12T00:00:00","modified_gmt":"2004-02-12T00:00:00","slug":"variabilidad-en-la-sensibilidad-corneal-y-conjuntival-a-estimulos-mecanicos-y-quimicos-con-la-edad","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-medicas\/variabilidad-en-la-sensibilidad-corneal-y-conjuntival-a-estimulos-mecanicos-y-quimicos-con-la-edad\/","title":{"rendered":"Variabilidad en la sensibilidad corneal y conjuntival a estimulos mecanicos y quimicos con la edad"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Alfaro Beltra Mar\u00eda  Luisa <\/strong><\/h2>\n<p>Cl\u00e1sicamente se ha utilizado la estesiometr\u00eda de contacto para explorar la sensibilidad de la c\u00f3rnea y la conjuntiva, si bien esta metodolog\u00eda, adem\u00e1s de producir lesiones epiteliales indeseables, s\u00f3lo ha permitido explorar la sensibilidad mec\u00e1nica. La aparici\u00f3n del estesiometro de gas (belmonte y cols, 1999) permite en la actualidad la exploraci\u00f3n inocua tanto de la sensibilidad mec\u00e1nica como de la qu\u00edmica y t\u00e9rmica y, por tanto, explorar cu\u00e1l es el estado de los diferentes tipos de inervaci\u00f3n sensorial de la superficie ocular, incluyendo no s\u00f3lo los receptores sensoriales que responden a la estimulaci\u00f3n mec\u00e1nica (mecanorreceptores y mecanonociceptores), sino tambi\u00e9n los que responde a la estimulaci\u00f3n qu\u00edmica y de calor (nociceptores polimodales) y los que lo hacen a la estimulaci\u00f3n con fr\u00edo (receptores de fr\u00edo).  este trabajo se ha centrado fundamentalmente en estudiar los cambios de la sensibilidad mec\u00e1nica y qu\u00edmica que se producen con la edad, siendo la primera vez que se describen las modificaciones asociadas a la edad de la sensibilidad qu\u00edmica de la superficie del ojo, tanto de la c\u00f3rnea como de la conjuntiva. Se ha determinado en la c\u00f3rnea y en la conjuntiva el umbral de sensibilidad qu\u00edmica y mec\u00e1nica, en 50 sujetos de ambos sexos y edades entre 23 y 71 a\u00f1os, evaluando: a) la evoluci\u00f3n con la edad, b) las diferecias entre sexos, c) las diferencias seg\u00fan el color del iris y d) la influencia sobre el umbral de los tres factores (edad, sexo y color de ojos).  los resultados muestran que existe un descenso en la sensibilidad mec\u00e1nica y qu\u00edmica con la edad, cl\u00e1ramente significativo en sujetos mayores de 50 a\u00f1os. Los umbrales de sensibilidad mec\u00e1nica se mantienen similares hasta los 50 a\u00f1os, experimentando posteriormente un salto, mientras que los umbrales de sensibilidad qu\u00edmica aumentan de manera progresiva con la edad, lo que indicar\u00eda que la p\u00e9rdida en la densidad o la funcionalidad de la<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Variabilidad en la sensibilidad corneal y conjuntival a estimulos mecanicos y quimicos con la edad<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Variabilidad en la sensibilidad corneal y conjuntival a estimulos mecanicos y quimicos con la edad <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Alfaro Beltra Mar\u00eda  Luisa <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Miguel hern\u00e1ndez de elche<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 02\/12\/2004<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Mar\u00eda  Del Carmen Acosta Boj<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Carlos Belmonte mart\u00ednez <\/li>\n<li> Martinez rubio Mar\u00eda  magdalena (vocal)<\/li>\n<li> Bellot bernabe Juan  lorenzo (vocal)<\/li>\n<li>esteban Perez hernandez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Alfaro Beltra Mar\u00eda Luisa Cl\u00e1sicamente se ha utilizado la estesiometr\u00eda de contacto para explorar la sensibilidad de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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