Dynamics of Feature Binding during Object-Selective Attention

Objects in the environment may be attended selectively and perceived as unified ensembles of their constituent features. To investigate the timing and cortical localization of feature-integration mechanisms in object-based attention, recordings of event-related potentials and magnetic fields were co...

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Published inProceedings of the National Academy of Sciences - PNAS Vol. 100; no. 20; pp. 11806 - 11811
Main Authors Schoenfeld, M. A., Tempelmann, C., Martinez, A., J. -M. Hopf, Sattler, C., H. -J. Heinze, Hillyard, S. A.
Format Journal Article
LanguageEnglish
Published United States National Academy of Sciences 30.09.2003
National Acad Sciences
SeriesFrom the Cover
Subjects
Adult
Attention - physiology
Behavioral neuroscience
Brain research
Color
Color change
Coordinate systems
Evoked Potentials
Experimentation
Face
Humans
Magnetic fields
Magnetic Resonance Imaging
Male
Medical imaging
Perception
Perceptual localization
Psychology
Sensory perception
Social Sciences
Visual Perception - physiology
Waveforms
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Summary:Objects in the environment may be attended selectively and perceived as unified ensembles of their constituent features. To investigate the timing and cortical localization of feature-integration mechanisms in object-based attention, recordings of event-related potentials and magnetic fields were combined with functional MRI while subjects attended to one of two superimposed transparent surfaces formed by arrays of dots moving in opposite directions. A spatiotemporal analysis revealed evidence for a rapid increase in neural activity localized to a color-selective region of the fusiform gyrus when the surface moving in the attended direction displayed an irrelevant color feature. These data provide support for the "integrated-competition" model of object-selective attention and point to a dynamic neural substrate for the rapid binding process that links relevant and irrelevant features to form a unified perceptual object.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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This paper was submitted directly (Track II) to the PNAS office.
Edited by Michael I. Posner, University of Oregon, Eugene, OR, and approved July 29, 2003
Abbreviations: fMRI, functional MRI; ERP, event-related potential; ERF, event-related magnetic field; RT, reaction time; ns, not significant.
To whom correspondence should be addressed at: Department of Neurosciences 0608, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0608. E-mail: shillyard@ucsd.edu.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1932820100