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Shaping the Visual Mismatch Response: The Influence of Exogenous Components and Stimulus Placement.
Nóra Csikós1,2, Bela Petro3, Zsófia Anna Gaál1
1Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences, Hungarian Research Network, Budapest, Hungary.
Psychophysiology
|July 23, 2025
Summary
This study explored visual mismatch responses (vMMR) and their link to early visual event-related potential (ERP) components. Lower visual field stimulation significantly influenced automatic change detection more than upper half-field stimulation.
Area of Science:
- Neuroscience
- Visual Perception
- Electrophysiology
Background:
- The visual mismatch response (vMMR) is a key indicator of automatic change detection in the visual modality.
- Understanding the vMMR's neural underpinnings is crucial for distinguishing between exogenous activity and specific deviant-related processing.
- Investigating the influence of stimulus location on vMMR can refine methodologies for studying visual change detection.
Purpose of the Study:
- To investigate the relationship between pattern-specific event-related potential (ERP) components (C1, C2, C3) and the visual mismatch response (vMMR).
- To examine how stimulus placement, specifically lower vs. upper half-field stimulation, affects the vMMR.
- To determine if vMMR arises from modulation of exogenous activity or specific deviant-related activity.
Main Methods:
- Two experiments employed passive oddball paradigms with checkerboard patterns (frequent standard, rare deviant).
- Stimuli were presented to lower, upper, and whole visual fields, with variations in sequence presentation between experiments.
- Event-related potentials (ERPs) were recorded, and source localization (sLORETA) was used to identify active brain regions.
Main Results:
- Polarity reversal of C1 and C2 components was observed based on the stimulated half-field.
- A negative vMMR was elicited by deviant stimuli during lower and whole-field stimulation, but not during upper half-field stimulation.
- The C2 component showed a larger amplitude for deviant stimuli under lower half-field stimulation, suggesting exogenous component contribution.
- sLORETA revealed similar active sources (e.g., primary visual cortex) for both exogenous and deviant-related components.
Conclusions:
- A clear relationship exists between pattern-specific ERPs and the vMMR.
- Lower half-field stimulation exerts a more dominant influence on brain activity during automatic visual change detection compared to upper half-field stimulation.
- These findings contribute to understanding the neural basis of vMMR and inform methods for its investigation.
