Cortical Circuit for Binding Object Identity and Location During Multiple-Object Tracking

Lauri Nummenmaa, Lauri Oksama, Enrico Glerean, Jukka Hyönä

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)
209 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)162-172
Number of pages11
JournalCerebral Cortex
Volume27
Issue number1
DOIs
Publication statusPublished - 1 Dec 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • attention
  • eye movements
  • fMRI
  • objec tracking

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