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Cross-Modal Multivariate Pattern Analysis
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Modality-general representations of valences perceived from visual and auditory modalities.

Jin Gu1, Linjing Cao1, Baolin Liu2

  • 1College of Intelligence and Computing, Tianjin University, Tianjin, 300350, PR China.

Neuroimage
|September 20, 2019
PubMed
Summary

This study reveals that the left postcentral gyrus processes general emotional valence across visual and auditory stimuli. This finding advances our understanding of how the brain represents emotions universally.

Keywords:
AuditoryLeft postcentral gyrusMTGModality-general representationValenceVisual

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Affective Science

Background:

  • Valence, a core dimension of emotion, can be positive, negative, or neutral.
  • Emotional valence is conveyed through visual (faces, bodies) and auditory (voices, music) modalities.
  • Understanding modality-general valence representations is crucial for comprehending emotional processing.

Purpose of the Study:

  • To investigate modality-general representations of emotional valence.
  • To determine if valence information is shared across visual and auditory modalities and different stimulus types within each modality.
  • To identify brain regions involved in processing universal valence representations.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to collect brain data.
  • Subjects performed affective judgments on visual (faces, bodies) and auditory (voices, music) stimuli.
  • Searchlight analysis and multivoxel pattern analysis (MVPA) were employed to analyze brain activity patterns.

Main Results:

  • Four brain areas, including bilateral postcentral gyrus, left middle temporal gyrus (MTG), and right middle frontal gyrus (MFG), showed potential sensitivity to modality-general valences.
  • The left postcentral gyrus successfully distinguished positive, negative, and neutral valences across all stimulus types (faces, bodies, voices, music).
  • The left MTG also showed cross-modal classification success for faces and bodies, with univariate analysis revealing valence-specific activation differences.

Conclusions:

  • The left postcentral gyrus plays a significant role in representing emotional valence universally across different sensory modalities and stimulus types.
  • This research extends the understanding of valence representation, highlighting its modality-general nature.
  • The findings suggest a shared neural substrate for processing emotional valence regardless of sensory input or specific stimulus characteristics.