Pattern Reversal Chromatic VEPs Like Onsets, Are Unaffected by Attentional Demand

Overview

Journal Vis Neurosci

Publisher Cambridge University Press

Specialties Neurology
Ophthalmology

Date 2024 Dec 16

PMID 39676579

Authors

Christabel Arthur

Osman B Kavcar

Mackenzie V Wise

Michael A Crognale

Affiliations

Soon will be listed here.

Abstract

Attention has been shown to modulate the visual evoked potential (VEP) recorded to reversing achromatic patterns. However, the chromatic onset VEP appears to be robust to attentional shifts. Functional magnetic resonance imaging (fMRI) responses to both chromatic and achromatic reversing patterns are also affected by attention. Resolution and comparison of these results is problematic due to differences in presentation mode, stimulus parameters, and the source of the response. Here, we report the results of experiments using comparable perceptual contrasts, pattern reversals, and a co-extensive and highly demanding multiple object tracking (MOT) task while exploring the effects of attentional modulation across both the chromatic (L - M) and (S - (L + M)) and the achromatic visual pathways. Our findings indicate that although achromatic VEPs are modulated by attention, chromatic VEPs are more robust to attentional modulation, even when using comparable stimulus presentation modes and in the presence of a highly demanding distractor task. In addition, we found that the majority of the modulation appears to be from a relative decrease in response due to the distractor task rather than a relative increase in response during heightened attention to the stimulus.

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