Effects of visual stimulus complexity on event-related brain potentials and viewing duration in a free-viewing task

2011 ◽  
Vol 497 (2) ◽  
pp. 85-89 ◽  
Author(s):  
Hanayo Shigeto ◽  
Junko Ishiguro ◽  
Hiroshi Nittono
Keyword(s):  
Visual Stimulus ◽  
Stimulus Complexity ◽  
Brain Potentials ◽  
Free Viewing

scholarly journals Visual stimulus complexity and food vs. food alone as rewards for rats

1965 ◽  
Vol 3 (1-12) ◽  
pp. 403-404 ◽  
Author(s):  
R. B. May ◽  
K. L. Beauchamp ◽  
S. Pollock
Keyword(s):  
Visual Stimulus ◽  
Stimulus Complexity

scholarly journals Visual stimulus complexity and approach behavior in rats

1971 ◽  
Vol 22 (3) ◽  
pp. 162-163 ◽  
Author(s):  
J. Dutch ◽  
L. B. Brown
Keyword(s):  
Visual Stimulus ◽  
Stimulus Complexity ◽  
Approach Behavior

scholarly journals Visual encoding and fixation target selection in free viewing: presaccadic brain potentials

2013 ◽  
Vol 7 ◽  
Author(s):  
Andrey R. Nikolaev ◽  
Peter Jurica ◽  
Chie Nakatani ◽  
Gijs Plomp ◽  
Cees van Leeuwen
Keyword(s):  
Target Selection ◽  
Fixation Target ◽  
Brain Potentials ◽  
Free Viewing ◽  
Visual Encoding

Processing Spatial and Temporal Discontinuities: Electrophysiological Indicators

2001 ◽  
Vol 15 (2) ◽  
pp. 80-94 ◽  
Author(s):  
Friederike Schlaghecken ◽  
Cristina Meinecke ◽  
Erich Schröger
Keyword(s):  
Visual Stimulus ◽  
Relative Frequency ◽  
Texture Segmentation ◽  
Behavioral Performance ◽  
Physical Stimulus ◽  
Brain Potentials ◽  
Latency Range ◽  
Stimulus Features ◽  
Segmentation Task ◽  
Spatial Discontinuity

Abstract In a series of four experiments measuring behavioral performance and event-related brain potentials (“ERPs”) in a texture segmentation task, we investigated whether there is evidence that texture stimuli containing a local discontinuity (“D-textures”) are conceptually different from homogeneous stimuli (“H-textures”). Stimuli were presented in an oddball design, with relative frequency of D-textures and H-textures being varied between experiments. It was found that these stimuli are not interchangeable in an oddball situation, as rare D-textures in a context of frequent H-textures give rise to the typical N2b-P3b effects, whereas rare H-textures in a context of frequent D-textures do not. This asymmetry arose because D-textures always elicited enlarged P3b components regardless of their relative frequency. It was concluded that the spatial discontinuity in D-textures adds a feature of “targetness” to these stimuli. Moreover, it was found that a posterior negative-going shift in the N2b latency range (“pN2b”) was mainly modulated by visual stimulus features. This result confirms and extends earlier findings demonstrating the sensitivity of the posterior N2b to physical stimulus characteristics.

scholarly journals Study of sensory information processing depending on visual stimulus complexity based on multichannel EEG signals

2020 ◽  
pp. 73-80
Author(s):  
Vladimir Maksimenko ◽  
Alexander Kuc ◽  
Marina Khramova ◽  
Aleksandr Hramov
Keyword(s):  
Information Processing ◽  
Electrical Activity ◽  
Visual Stimulus ◽  
Neural Activity ◽  
Visual Information ◽  
Sensory Information ◽  
Spectral Amplitude ◽  
Cognitive State ◽  
Stimulus Complexity ◽  
Sensory Information Processing

Introduction: Analysis of electrical activity in the cortical neural network during the processing of visual information is one ofthe most interesting issues in modern neuroscience. The particular attention of the researchers is attracted by the study of neuralactivity during complex visual stimuli processing. Purpose: Studying the process of sensory information processing in the corticalneural network based on recorded electrical activity signals (EEG). Results: We have studied neural activity during visual informationprocessing based on the stimulus-related change in the spectral EEG energy in the 15–30 Hz frequency band. Using the developedapproach, we analyzed the influence of the visual stimulus complexity on the features of spatio-temporal neural activity. It has beenfound that at low complexity the spectral amplitude of the EEG in the range of 15–30 Hz increases mainly in the parietal zone. Withincreasing complexity, the spectral amplitude of the EEG increases simultaneously in different parts of the cortex, mainly in the frontalregion. Practical relevance: The identified features of neural dynamics can be used in the development of passive brain-computerinterfaces to monitor a person’s cognitive state and evaluate the cognitive load in real time.

Skipping Breakfast Affects the Early Steps of Cognitive Processing

2019 ◽  
Vol 33 (2) ◽  
pp. 109-118
Author(s):  
Andrés Antonio González-Garrido ◽  
Jacobo José Brofman-Epelbaum ◽  
Fabiola Reveca Gómez-Velázquez ◽  
Sebastián Agustín Balart-Sánchez ◽  
Julieta Ramos-Loyo
Keyword(s):  
Working Memory ◽  
Cognitive Processing ◽  
Task Difficulty ◽  
Brain Activity ◽  
Reaction Times ◽  
Brain Potentials ◽  
Brain Functioning ◽  
Attentional Processes ◽  
Electrical Brain Activity ◽  
Skipping Breakfast

Abstract. It has been generally accepted that skipping breakfast adversely affects cognition, mainly disturbing the attentional processes. However, the effects of short-term fasting upon brain functioning are still unclear. We aimed to evaluate the effect of skipping breakfast on cognitive processing by studying the electrical brain activity of young healthy individuals while performing several working memory tasks. Accordingly, the behavioral results and event-related brain potentials (ERPs) of 20 healthy university students (10 males) were obtained and compared through analysis of variances (ANOVAs), during the performance of three n-back working memory (WM) tasks in two morning sessions on both normal (after breakfast) and 12-hour fasting conditions. Significantly fewer correct responses were achieved during fasting, mainly affecting the higher WM load task. In addition, there were prolonged reaction times with increased task difficulty, regardless of breakfast intake. ERP showed a significant voltage decrement for N200 and P300 during fasting, while the amplitude of P200 notably increased. The results suggest skipping breakfast disturbs earlier cognitive processing steps, particularly attention allocation, early decoding in working memory, and stimulus evaluation, and this effect increases with task difficulty.

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