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Chemical Senses Advance Access originally published online on May 10, 2007
Chemical Senses 2007 32(6):569-581; doi:10.1093/chemse/bjm025
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© The Author 2007. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Trying to Detect Taste in a Tasteless Solution: Modulation of Early Gustatory Cortex by Attention to Taste

Maria G. Veldhuizen1,2, Genevieve Bender1,3, R. Todd Constable3,4 and Dana M. Small1,2,3

1 Affective Sensory Neuroscience, The John B. Pierce Laboratory, 290 Congress Avenue, New Haven, CT 06519, USA 2 Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA 3 Interdepartmental Neuroscience, Yale University School of Medicine, New Haven, CT, USA 4 Department of Radiology, Yale University School of Medicine, New Haven, CT, USA

Correspondence to be sent to: Maria G. Veldhuizen, Affective Sensory Neuroscience, The John B. Pierce Laboratory, 290 Congress Avenue, New Haven, CT 06519, USA. e-mail: mveldhuizen{at}jbpierce.org


  Abstract

Selective attention is thought to be associated with enhanced processing in modality-specific cortex. We used functional magnetic resonance imaging to evaluate brain response during a taste detection task. We demonstrate that trying to detect the presence of taste in a tasteless solution results in enhanced activity in insula and overlying operculum. The same task does not recruit orbitofrontal cortex (OFC). Instead, the OFC responds preferentially during receipt of an unpredicted taste stimulus. These findings demonstrate functional specialization of taste cortex in which the insula and the overlying operculum are recruited during taste detection and selective attention to taste, and the OFC is recruited during receipt of an unpredicted taste stimulus.

Key words: baseline shift, fMRI, gustatory cortex, humans, insula

Accepted 27 March 2007


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