Mapping brain networks underlying abstract perceptual decision formation and its EEG signatures
- 1University of Ulster
Abstract
Perceptual decisions have been proposed to involve a common mechanism of evidence accumulation operating across sensory modalities and motor contexts. In human EEG, the centroparietal positivity (CPP) tracks evidence accumulation in such a supramodal motor-independent manner, but its cortical sources are uncertain. Here we combined fMRI and EEG, acquired in separate sessions of the same supramodal change-detection paradigm, with individualized finite element head modeling to identify decision-related networks. A conjunction analysis across visual and auditory modalities and across motor and non-motor required tasks revealed consistent activation of bilateral postcentral, supramarginal, and superior parietal lobules, precentral gyrus, central operculum, middle frontal gyrus, and cerebellum. Forward modeling of fMRI-defined sources indicated that parietal-opercular regions were the dominant contributors to the response-locked and non-motor-required peak-locked CPP signal. These results implicate a network of brain areas in supramodal, motor-independent target-detection decisions, whose specific functional roles can be interrogated in more complex decision tasks in future.
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BibTeX
@misc{asadpour2026mapping,
title = {{Mapping brain networks underlying abstract perceptual decision formation and its EEG signatures}},
author = {A. Asadpour and N. A. Steinemann and K. Kalou and S. P. Kelly and R. G. O'Connell and K. Wong-Lin},
howpublished = {bioRxiv},
year = {2026},
month = oct,
doi = {10.64898/2026.10.29.762507},
url = {https://www.biorxiv.org/content/10.64898/2026.10.29.762507v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Mapping brain networks underlying abstract perceptual decision formation and its EEG signatures
AU - A. Asadpour
AU - N. A. Steinemann
AU - K. Kalou
AU - S. P. Kelly
AU - R. G. O'Connell
AU - K. Wong-Lin
PY - 2026
DA - 2026/10/29
PB - bioRxiv
DO - 10.64898/2026.10.29.762507
UR - https://www.biorxiv.org/content/10.64898/2026.10.29.762507v1
AB - Perceptual decisions have been proposed to involve a common mechanism of evidence accumulation operating across sensory modalities and motor contexts. In human EEG, the centroparietal positivity (CPP) tracks evidence accumulation in such a supramodal motor-independent manner, but its cortical sources are uncertain. Here we combined fMRI and EEG, acquired in separate sessions of the same supramodal change-detection paradigm, with individualized finite element head modeling to identify decision-related networks. A conjunction analysis across visual and auditory modalities and across motor and non-motor required tasks revealed consistent activation of bilateral postcentral, supramarginal, and superior parietal lobules, precentral gyrus, central operculum, middle frontal gyrus, and cerebellum. Forward modeling of fMRI-defined sources indicated that parietal-opercular regions were the dominant contributors to the response-locked and non-motor-required peak-locked CPP signal. These results implicate a network of brain areas in supramodal, motor-independent target-detection decisions, whose specific functional roles can be interrogated in more complex decision tasks in future.
ER -