title: Cortical Circuit for Binding Object Identity and Location During Multiple-Object Tracking.
abstract: Sustained multifocal attention for moving targets requires binding object identities with their locations. The brain mechanisms of identity-location binding during attentive tracking have remained unresolved. In 2 functional magnetic resonance imaging experiments, we measured participants' hemodynamic activity during attentive tracking of multiple objects with equivalent (multiple-object tracking) versus distinct (multiple identity tracking, MIT) identities. Task load was manipulated parametrically. Both tasks activated large frontoparietal circuits. MIT led to significantly increased activity in frontoparietal and temporal systems subserving object recognition and working memory. These effects were replicated when eye movements were prohibited. MIT was associated with significantly increased functional connectivity between lateral temporal and frontal and parietal regions. We propose that coordinated activity of this network subserves identity-location binding during attentive tracking.
authors.affiliation: Turku PET Centre, University of Turku, Turku, Finland.|Department of Psychology, University of Turku, Turku, Finland.
authors.forename: Lauri
authors.initials: L
authors.lastname: Nummenmaa
authors.affiliation: National Defence University, Helsinki, Finland.
authors.forename: Lauri
authors.initials: L
authors.lastname: Oksama
authors.affiliation: Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, Espoo, Finland.|Advanced Magnetic Imaging Centre, Aalto Neuroimaging, School of Science, Aalto University, Espoo, Finland.
authors.forename: Erico
authors.initials: E
authors.lastname: Glerean
authors.affiliation: Department of Psychology, University of Turku, Turku, Finland.
authors.forename: Jukka
authors.initials: J
authors.lastname: Hyönä
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology*; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology; D009039:Motion Perception / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*; D013647:Task Performance and Analysis; D014793:Visual Cortex / Q000502:physiology; D014794:Visual Fields / Q000502:physiology; D055815:Young Adult
keywords: attention; eye movements; fMRI; object tracking