The right temporo-parietal junction contributes to visual feature binding

We investigated the neural basis of conjoined processing of color and spatial frequency with functional magnetic resonance imaging (fMRI). A multivariate classification algorithm was trained to differentiate between either isolated color or spatial frequency differences, or between conjoint differen...

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Bibliographic Details
Published in:NeuroImage (Orlando, Fla.) Fla.), 2014-11, Vol.101, p.289-297
Main Authors: Pollmann, Stefan, Zinke, Wolf, Baumgartner, Florian, Geringswald, Franziska, Hanke, Michael
Format: Article
Language:English
Subjects:
Adult
Attention
Brain
Brain Mapping - methods
Classification
Cognitive science
Color Perception - physiology
Feature integration
Female
fMRI
Functional Laterality - physiology
Humans
Magnetic Resonance Imaging
Male
MVPA
Neuroscience
Parietal
Parietal Lobe - physiology
Psychology
Space Perception - physiology
Studies
Temporal Lobe - physiology
Visual Perception - physiology
Visual search
Visual task performance
Young Adult
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Summary:We investigated the neural basis of conjoined processing of color and spatial frequency with functional magnetic resonance imaging (fMRI). A multivariate classification algorithm was trained to differentiate between either isolated color or spatial frequency differences, or between conjoint differences in both feature dimensions. All displays were presented in a singleton search task, avoiding confounds between conjunctive feature processing and search difficulty that arose in previous studies contrasting single feature and conjunction search tasks. Based on patient studies, we expected the right temporo-parietal junction (TPJ) to be involved in conjunctive feature processing. This hypothesis was confirmed in that only conjoined color and spatial frequency differences, but not isolated feature differences could be classified above chance level in this area. Furthermore, we could show that the accuracy of a classification of differences in both feature dimensions was superadditive compared to the classification accuracies of isolated color or spatial frequency differences within the right TPJ. These data provide evidence for the processing of feature conjunctions, here color and spatial frequency, in the right TPJ. •Right temporo-parietal junction (TPJ) is involved in visual feature binding.•Additional superior parietal lobule involvement in binding replicated.•Binding tested very conservatively (race inequality violation).•No confound with different visual search tasks•Putative joint role of TPJ in unimodal and crossmodal feature binding
ISSN:1053-8119
1095-9572
DOI:10.1016/j.neuroimage.2014.07.021