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fMRI-based multivariate pattern analyses reveal imagery modality and imagery content specific representations in primary somatosensory, motor and auditory cortices

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Abstract

Previous studies have shown that the early visual cortex contains content-specific representations of stimuli during visual imagery, and that these representational patterns of imagery content have a perceptual basis.
To date, there is little evidence for the presence of a similar organization in the auditory and tactile domains. Using fMRI-based multivariate pattern analyses we showed that primary somatosensory, auditory, motor, and visual cortices are discriminative for imagery of touch versus sound. In the somatosensory, motor and visual cortices the imagery modality discriminative patterns were similar to perception modality discriminative patterns, suggesting that top-down modulations in these regions rely on similar neural representations as bottom-up perceptual processes.
Moreover, we found evidence for content-specific representations of the stimuli during auditory imagery in the primary somatosensory and primary motor cortices. Both the imagined emotions and the imagined identities of the auditory stimuli could be successfully classified in these regions.

    Research areas

  • auditory cortex, decoding, mental imagery, MVPA, somatosensory cortex, VISUAL-MENTAL-IMAGERY, WORKING-MEMORY, FUNCTIONAL MRI, HUMAN BRAIN, TEMPOROPARIETAL JUNCTION, CYTOARCHITECTONIC MAPS, SPEECH-PERCEPTION, TACTILE IMAGERY, CORTEX, AREAS
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Details

Original languageEnglish
Pages (from-to)3994-4009
Number of pages16
JournalCerebral Cortex
Volume27
Issue number8
Early online date29 Jul 2016
DOIs
Publication statusPublished - Aug 2017