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Cerebral Cortex Advance Access published online on May 12, 2006
Cerebral Cortex, doi:10.1093/cercor/bhk029
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© The Author 2006. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Article

Similar Frontal and Distinct Posterior Cortical Regions Mediate Visual and Auditory Perceptual Awareness

Johan Eriksson 1 *, Anne Larsson 2, Katrine Riklund Åhlström 3, and Lars Nyberg 4

1 Department of Psychology, Umeå University, S-901 87 Umeå, Sweden
2 Department of Radiation Science, Radiation Physics, Umeå University, S-901 87 Umeå, Sweden; Umeå Centre for Functional Brain Imaging (UFBI), Umeå, Sweden
3 Umeå Centre for Functional Brain Imaging (UFBI), Umeå, Sweden; Department of Radiation Sciences, Diagnostic Radiology, Umeå University, S-901 87 Umeå, Sweden
4 Umeå Centre for Functional Brain Imaging (UFBI), Umeå, Sweden; Department of Radiation Sciences, Diagnostic Radiology, Umeå University, S-901 87 Umeå, Sweden; Department of Integrative Medical Biology, Physiology Section, Umeå University, S-901 87 Umeå, Sweden

* To whom correspondence should be addressed.
Johan Eriksson, E-mail: johan.eriksson{at}psy.umu.se


  Abstract

Activity in ventral visual cortex is a consistent neural correlate of visual consciousness. However, activity in this area seems insufficient to produce awareness without additional involvement of frontoparietal regions. To test the generality of the frontoparietal response, neural correlates of auditory awareness were investigated in a paradigm that previously has revealed frontoparietal activity during conscious visual perception. A within-experiment comparison showed that frontal regions were related to both visual and auditory awareness, whereas parietal activity was correlated with visual awareness and superior temporal activity with auditory awareness. These results indicate that frontal regions interact with specific posterior regions to produce awareness in different sensory modalities.

Keywords: auditory awareness; fMRI; parietal cortex; prefrontal cortex; visual awareness.
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