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Journal Article

Orientation pop-out processing in human visual cortex

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Bogler,  Carsten
Bernstein Center for Computational Neuroscience Berlin, Charité-Universitätsmedizin Berlin, Germany;
Max Planck Fellow Research Group Attention and Awareness, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Bode,  Stefan
Max Planck Fellow Research Group Attention and Awareness, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Department of Neurology, Otto-von-Guericke University Magdeburg, Germany;
Melbourne School of Psychological Sciences, The University of Melbourne, Australia;

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Haynes,  John-Dylan
Bernstein Center for Computational Neuroscience Berlin, Charité-Universitätsmedizin Berlin, Germany;
Max Planck Fellow Research Group Attention and Awareness, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Department of Neurology, Otto-von-Guericke University Magdeburg, Germany;

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Citation

Bogler, C., Bode, S., & Haynes, J.-D. (2013). Orientation pop-out processing in human visual cortex. NeuroImage, 81, 73-80. doi:10.1016/j.neuroimage.2013.05.040.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-84CA-1
Abstract
Visual stimuli can “pop out” if they are different to their background. There has been considerable debate as to the role of primary visual cortex (V1) versus higher visual areas (esp. V4) in pop-out processing. Here we parametrically modulated the relative orientation of stimuli and their backgrounds to investigate the neural correlates of pop-out in visual cortex while subjects were performing a demanding fixation task in a scanner. Whole brain and region of interest analyses confirmed a representation of orientation contrast in extrastriate visual cortex (V4), but not in striate visual cortex (V1). Thus, although previous studies have shown that human V1 can be involved in orientation pop-out, our findings demonstrate that there are cases where V1 is “blind” and pop-out detection is restricted to higher visual areas. Pop-out processing is presumably a distributed process across multiple visual regions.