{"id":74672,"date":"2018-03-09T23:19:45","date_gmt":"2018-03-09T23:19:45","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/disfuncion-y-cambios-plasticos-corticales-en-tinnitus-medidos-a-traves-de-la-magnetoencefalografa%c2%ada\/"},"modified":"2018-03-09T23:19:45","modified_gmt":"2018-03-09T23:19:45","slug":"disfuncion-y-cambios-plasticos-corticales-en-tinnitus-medidos-a-traves-de-la-magnetoencefalografa%c2%ada","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-medicas\/disfuncion-y-cambios-plasticos-corticales-en-tinnitus-medidos-a-traves-de-la-magnetoencefalografa%c2%ada\/","title":{"rendered":"Disfunci\u00f3n y cambios pl\u00e1sticos corticales en tinnitus medidos a trav\u00e9s de la magnetoencefalograf\u00eda"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Marta Santiuste D\u00edaz <\/strong><\/h2>\n<p>Introducci\u00f3n  la inexistencia de un tratamiento satisfactorio para la poblaci\u00f3n afecta de tinnitus, la sensaci\u00f3n consciente de un sonido inexistente, se fundamenta en el desconocimiento de la fisiopatolog\u00eda de este s\u00edntoma. Se ha apuntado hacia una implicaci\u00f3n del sistema auditivo central en el tinnitus, pero los estudios relacionados son escasos debido a que los m\u00e9todos de exploraci\u00f3n no aportan una resoluci\u00f3n temporo-espacial \u00f3ptima y\/o presentan un alto grado de invasividad de cara a la exploraci\u00f3n cortical. Con el objetivo de la valoraci\u00f3n de la respuesta fisiol\u00f3gica cortical en el tinnitus a trav\u00e9s del an\u00e1lisis de la onda m100 con magnetoencefalograf\u00eda (meg), se propone estudiar la localizaci\u00f3n, la intensidad y la latencia del componente m100 de los campos evocados auditivos a distintas frecuencias en pacientes con tinnitus.  m\u00e9todo  se estudia un grupo de 20 pacientes con tinnitus y se comparan los resultados con un grupo control de 9 sujetos sin tinnitus. Se realizan 10 registros con meg de 148 canales en cada sujeto, explorando la respuesta cortical a la estimulaci\u00f3n de ambos o\u00eddos con tonos puros de 5 frecuencias (0.5, 1, 2, 4 y 8 khz), de 50 milisegundos de duraci\u00f3n, intensidad 60 db sobreumbral e intervalo interest\u00edmulo aleatorio entre 1 y 2 segundos y ruido blanco contralateral a la misma intensidad. Con una frecuencia de muestreo de 678.17 hz por canal y un filtro paso banda de 0.1 a 200 hz, se adquieren y analizan las se\u00f1ales recogidas en cada uno de los 148 canales meg, que luego son promediadas y se nuevo filtradas con un paso banda de 2 a 40 hz. Para la elecci\u00f3n de dipolos se impone criterio de corte de mejor correlaci\u00f3n mayor 0.90, bondad de ajuste mayor 0.90, volumen de confianza menor 1mm3, root mean square mayor 50 ft y momento bipolar magn\u00e9tico menor 40 ft. Los dipolos representativos se fusionan a la imagen de rm 3d de cada sujeto.  resultados  no se ha detectado una organizaci\u00f3n ton<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Disfunci\u00f3n y cambios pl\u00e1sticos corticales en tinnitus medidos a trav\u00e9s de la magnetoencefalograf\u00eda<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Disfunci\u00f3n y cambios pl\u00e1sticos corticales en tinnitus medidos a trav\u00e9s de la magnetoencefalograf\u00eda<\/li>\n<li><strong>Autor:<\/strong>\u00a0 Marta Santiuste D\u00edaz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 17\/06\/2005<\/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>Joaquin Poch Broto<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: pablo Gil loyzaga <\/li>\n<li>torcuato Labella caballero (vocal)<\/li>\n<li>Jos\u00e9 Traserra traserra (vocal)<\/li>\n<li>Miguel Gonzalez perez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Marta Santiuste D\u00edaz Introducci\u00f3n la inexistencia de un tratamiento satisfactorio para la poblaci\u00f3n afecta de tinnitus, la [&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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