Dynamics of Feature Binding During Object-selective Attention

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2003 Sep 10

PMID 12960369

Citations 50

Authors

M A Schoenfeld

C Tempelmann

A Martinez

J-M Hopf

C Sattler

H-J Heinze

S A Hillyard

Affiliations

Soon will be listed here.

Abstract

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.

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