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Procesamiento visual temprano durante la rivalidad binocular

Authors: Labra, Carmen de;

Procesamiento visual temprano durante la rivalidad binocular

Abstract

[Resumen] La tesis presentada se centro en estudiar los correlatos neurales de la conciencia visual empleando para ello tecnicas no invasivas electricas (potenciales evocados visuales, VEPs) y opticas durante la rivalidad binocular. En los experimentos de rivalidad binocular dos imágenes diferentes se presentan a cada ojo, causando dos interpretaciones perceptuales alternativas. Debido a que los cambios en la percepcion ocurren a pesar de que el estimulo visual es constante, el paradigma de rivalidad binocular ofrece una excelente oportunidad para estudiar los correlatos neurales de la conciencia visual. Los resultados con los VEPs revelaron un potencial, que se extiende desde los 100 hasta los 300 ms, relacionado con el estado de rivalidad. A este potencial se denomino RRP (Rivaly-Related Potencial, RRP). El temprano comienzo del RRP, distribucion y polaridad sugirio que este potencial podria originarse en el cortex visual primario o V1. El origen del RRP se investigo empleando una tecnica optica conocida con el nombre de EROS (Event-Related Optical Signal). En esta tecnica se injecta luz cerca del infrarrojo (NIR) en el craneo y se miden los cambios en la dispersion de la luz producidos por la estimulacion sensorial. La ventaja de esta tecnica optica es que posee una mayor resolucion espacial que la señal de EEG(electroencefalografia). Con estimulos foveales se encontro que la actividad en V1 no varia con el estado perceptual del sujeto.

Country
Spain
Related Organizations
Keywords

Visión binocular

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green