Luminance noise impacts putative luminance components of visual evoked potentials but not chromatic components.

IF 2 4区心理学 Q3 PSYCHOLOGY, MULTIDISCIPLINARY

Psicologia-Reflexao E Critica Pub Date : 2025-07-28 DOI:10.1186/s41155-025-00348-z

Bellany Barbosa Lopes, Terezinha Medeiros Gonçalves Loureiro, Felipe André da Costa Brito, Letícia Miquilini, Alódia Brasil, Marcelo Fernandes Costa, Railson Cruz Salomão, Dora Fix Ventura, Ana Leda Brino, Givago da Silva Souza

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引用次数: 0

Abstract

Introduction: Pseudoisochromatic stimuli are widely used in psychophysical color vision testing and the features of the luminance noise present on these stimuli have been reported modifying the psychophysical chromatic discrimination.

Objective: The present study investigated how modifications in the luminance noise features (luminance contrast and number of luminance values) affect chromatic visual evoked cortical potentials (VECP) elicited by pseudoisochromatic gratings, aiming to evaluate the influence of luminance contrast and the number of luminance values in the pseudoisochromatic stimulus on the chromatic VECP.

Methods: The sample consisted of seven young trichromatic participants. The waveforms of the visual evoked cortical potentials (VECP) were analyzed, focusing on the P1, N1, and P2 components across all stimulus conditions. The luminance noise contrast in the pseudoisochromatic stimulus had distinct effects on the amplitudes of the VECP components. Significant effects were observed for the amplitudes of the P1 (p = 0.01) and P2 (p = 0.04) components, while no significant effect was found on the amplitude of the N1 component (p = 0.3).

Results: There was no significant effect of the luminance noise range on the latency of the VECP components (P1 VECP component, p = 0.54; N1 VECP component, p = 0.79; P2 VECP component, p = 0.49). The number of luminance values in the noise had no significant effect on VECP components amplitude and latency. Different manipulations of luminance noise influenced P1 and P2 VECP components and no modification of the luminance noise had influence on the main chromatic VECP component, N1 component.

Conclusion: Manipulations in features of the luminance noise in pseudoisocrhomatic stimulus impacted in putative luminance components, but not chromatic components, of visual evoked potentials. The present findings may have potential applications in clinical neuro-ophthalmology, particularly for assessing congenital and acquired color blindness.

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亮度噪声影响视觉诱发电位的假定亮度成分，但不影响色度成分。

摘要：伪等色刺激在心理物理色觉测试中被广泛应用，这些刺激上存在的亮度噪声特征已经被报道改变了心理物理色觉辨别。目的：研究亮度噪声特征（亮度对比和亮度值数目）的改变对假等色光栅诱发的色觉皮质诱发电位（VECP）的影响，探讨假等色刺激中亮度对比和亮度值数目对色觉皮质诱发电位的影响。方法：样本由7名年轻三色受试者组成。分析了视觉皮层诱发电位（VECP）的波形，重点分析了所有刺激条件下P1、N1和P2分量。伪等色刺激的亮度噪声对比对VECP分量的振幅有明显的影响。P1和P2分量的振幅有显著影响（p = 0.01），而N1分量的振幅无显著影响（p = 0.3）。结果：亮度噪声范围对VECP分量潜伏期无显著影响(P1 VECP分量，p = 0.54；N1 VECP分量，p = 0.79；P2 VECP分量，p = 0.49)。噪声中亮度值的个数对VECP分量振幅和潜伏期无显著影响。不同亮度噪声的处理对P1和P2 VECP分量有影响，而亮度噪声的处理对主色VECP分量N1分量没有影响。结论：对假等色刺激中亮度噪声特征的操作对视觉诱发电位的亮度分量有影响，但对色度分量无影响。本研究结果可能在临床神经眼科，特别是先天性和后天性色盲的评估中具有潜在的应用价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Psicologia-Reflexao E Critica PSYCHOLOGY, MULTIDISCIPLINARY-

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

24 weeks

期刊介绍： Psicologia: Reflexão & Crítica is a journal published three times a year by Programa de Pós-Graduação em Psicologia do Desenvolvimento (Psychology Graduate Program) of the Universidade Federal do Rio Grande do Sul - UFRGS (Federal University of Rio Grande do Sul). Its objective is to publish original works in the psychology field: articles, short reports on research and reviews as well as to present to the scientific community texts which reflect a significant contribution for the psychology field. The short title of the journal is Psicol. Refl. Crít. It must be used regarding bibliographies, footnotes, as well as bibliographical strips and references.