Journal
CHEMICAL SENSES
Volume 32, Issue 6, Pages 569-581Publisher
OXFORD UNIV PRESS
DOI: 10.1093/chemse/bjm025
Keywords
baseline shift; fMRI; gustatory cortex; humans; insula
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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.
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