Dynamic Visual Noise
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. A integração da informação visual e espacial na memória de trabalho: evidências baseadas no efeito do ruído visual dinâmico / The integration of visual and spatial information in working memory: evidence based on the effect of dynamic visual noise
Neste projeto investigamos a memória para as informações visual e espacial armazenadas separadamente e de forma conjugada, utilizando o ruído visual dinâmico (RVD) como interferência seletiva. No experimento 1 foi estudado o efeito do (RVD) sobre o desempenho de uma tarefa de memória visual e de memória espacial em situações nas quais essas informa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/10/2012
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2. "Collective coding" of correlated cone signals in the retinal ganglion cell.
The signals in neighboring cones are partially correlated due to local correlations of luminance in the visual scene. By summing these partially correlated signals, the retinal ganglion cell improves its signal/noise ratio (compared to the signal/noise ratio in a cone) and expands the variance of its response to fill its dynamic range. Our computations prove
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3. Slow and fast visual motion channels have independent binocular-rivalry stages.
We have previously reported a transparent motion after-effect indicating that the human visual system comprises separate slow and fast motion channels. Here, we report that the presentation of a fast motion in one eye and a slow motion in the other eye does not result in binocular rivalry but in a clear percept of transparent motion. We call this new visual
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4. Objective detection of hemifield and quadrantic field defects by visual evoked cortical potentials.
AIMS/BACKGROUND: An objective method for detecting hemifield and quadrantic visual field defects has been developed using steady state visual evoked cortical potentials (VECPs), an adaptive noise canceller (ANC), and Hotelling's t2 statistic. The purpose of this study was to determine the sensitivity and specificity of the technique. METHODS: Nine subjects (
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5. Dynamic synaptic modification threshold: computational model of experience-dependent plasticity in adult rat barrel cortex.
Previous electrophysiological experiments have documented the response of neurons in the adult rat somatic sensory ("barrel") cortex to whisker movement after normal experience and after periods of experience with all but two whiskers trimmed close to the face (whisker "pairing"). To better understand how the barrel cortex adapts to changes in the flow of se