Evidence accumulation during perceptual decisions in humans varies as a function of dorsal frontoparietal organization

Brosnan, Méadhbh B., Sabaroedin, Kristina, Silk, Tim, Genc, Sila, Newman, Daniel P., Loughnane, Gerard M., Fornito, Alex, O'Connell, Redmond G. and Bellgrove, Mark A. (2020) Evidence accumulation during perceptual decisions in humans varies as a function of dorsal frontoparietal organization. Nature Human Behaviour, 4 (8). pp. 844-855. ISSN 2397-3374

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Abstract

Animal neurophysiological studies have identified neural signals within dorsal frontoparietal areas that trace a perceptual decision by accumulating sensory evidence over time and trigger action upon reaching a threshold. Although analogous accumulation-to-bound signals are identifiable on extracranial human electroencephalography, their cortical origins remain unknown. Here neural metrics of human evidence accumulation, predictive of the speed of perceptual reports, were isolated using electroencephalography and related to dorsal frontoparietal network (dFPN) connectivity using diffusion and resting-state functional magnetic resonance imaging. The build-up rate of evidence accumulation mediated the relationship between the white matter macrostructure of dFPN pathways and the efficiency of perceptual reports. This association between steeper build-up rates of evidence accumulation and the dFPN was recapitulated in the resting-state networks. Stronger connectivity between dFPN regions is thus associated with faster evidence accumulation and speeded perceptual decisions. Our findings identify an integrated network for perceptual decisions that may be targeted for neurorehabilitation in cognitive disorders.

Item Type:	Article
Uncontrolled Keywords:	Adolescent; Decision Making; Electroencephalography; Female; Frontal Lobe; Functional Neuroimaging; Humans; Magnetic Resonance Imaging; Male; Neural Pathways; Parietal Lobe; Perception; White Matter; Young Adult
Subjects:	B Philosophy. Psychology. Religion > Psychology R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry B Philosophy. Psychology. Religion > Psychology > Cognition B Philosophy. Psychology. Religion > Psychology > Cognitive psychology
Divisions:	School of Business > Staff Research and Publications
Depositing User:	Tamara Malone
Date Deposited:	13 Jun 2025 10:28
Last Modified:	13 Jun 2025 10:46
URI:	https://norma.ncirl.ie/id/eprint/7837

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