John Duncan

Jan 16, 2025 | biorxiv.org | Moataz Assem |Sneha Shashidhara |Matthew Glasser |John Duncan

AbstractThe fine-grained functional organization of the human lateral prefrontal cortex (PFC) remains poorly understood. Previous fMRI studies delineated focal domain-general, or multiple-demand (MD), PFC areas that co-activate during diverse cognitively demanding tasks. While there is some evidence for category-selective (face and scene) patches, in human and non-human primate PFC, these have not been systematically assessed.

Jan 14, 2025 | biorxiv.org | Ashley Zhou |John Duncan |Daniel Mitchell |MRC Cognition

AbstractThis study used functional MRI data from the StudyForrest dataset to investigate the role of subnetworks of the default mode network (DMN) during naturalistic stimulus transitions of different types and magnitudes. We found distinct activation profiles within the DMN: the dmPFC subnetwork was specifically associated with character and location transitions, the MTL subnetwork preferred location and temporal transitions, while the Core DMN subnetwork responded to all three transition types.

Jul 8, 2024 | biorxiv.org | Ashley Zhou |John Duncan |Daniel Mitchell |MRC Cognition

AbstractRecent findings challenge traditional views of the Default Mode Network (DMN) as purely task-negative or self-oriented, showing increased DMN activity during demanding switches between externally-focused tasks (Crittenden et al., 2015; Smith et al., 2018; Zhou et al., 2024). However, it is unclear what modulates the DMN at switches, with transitions within a stimulus domain activating DMN regions in some studies but not others.

May 5, 2024 | geomarketers.com | John Duncan

GeoMinds: How Location is Aiding Music Marketers in their Quest to Reach Millennials this SummerGeo-fencing isn't very effective within outdoor venues; but xAd's John Duncan shows how brands can find their target within a crowd.

May 2, 2024 | geomarketers.com | John Duncan

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