Application of electrophysiological tests in the study of neurological diseases with visual involvement.
نویسندگان
چکیده
2 respuestas: un componente positivo, P1 (P50 luminanciaas enfermedades neurodegenerativas son muy heterogéneas n cuanto a sus síntomas y hallazgos anatomopatológicos. Se esconocen las causas que provocan la pérdida neuronal en stas patologías. De hecho, los procesos en los que se prouce una pérdida de neuronas por una causa conocida (por jemplo, los episodios de desmielinización o los trastornos etabólicos) no se consideran enfermedades neurodegeneraivas como tales. El principal factor de riesgo para desarrollar stas patologías es la edad. El aumento previsto en la espeanza de vida de la población para los próximos años hará ue la prevalencia de estas patologías se duplique. Las enferedades neurodegenerativas afectan y limitan muchas de as actividades corporales, incluyendo el equilibrio, el moviiento, el habla, la respiración y la función cardiaca. Muchas e estas enfermedades son genéticas, lo que significa que se eredan o que existe una mutación genética. Las pruebas neuofisiológicas, en concreto los potenciales evocados visuales PEV) y el electrorretinograma Pattern (PERG), pueden ayudar evaluar la afectación de la vía visual en estas patologías. El origen del PEV está en la línea media de la corteza occipial y aporta información que ayuda a completar el estudio de a vía visual hasta la corteza cerebral. Sin embargo, el PERG es enerado por las capas internas de la retina (células ganglioares y sus axones), por lo que sus alteraciones se consideran ás específicas de la afectación de la capa de fibras nerviosas e la retina que las anomalías detectadas por los PEV1.
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عنوان ژورنال:
- Archivos de la Sociedad Espanola de Oftalmologia
دوره 87 10 شماره
صفحات -
تاریخ انتشار 2012