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Dance and emotion in posterior parietal cortex: a low-frequency rTMS study.

Marie-Hélène Grosbras1, Haodan Tan, Frank Pollick

  • 1Institute of Neuroscience and Psychology, School of Psychology, University of Glasgow, 58 Hillhead Street, G128QB Glasgow, Scotland, United Kingdom. marie.grosbras@glasgow.ac.uk

Brain Stimulation
|April 13, 2012
PubMed
Summary

Brain stimulation of the posterior parietal cortex causally influences emotional responses to dance. This neurostimulation approach enhances appreciation of peak positive moments in art, suggesting a link between cognitive and emotional resource allocation.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Neuroaesthetics

Background:

  • Traditional studies on emotion's neural basis often use brief, artificial stimuli and correlational methods.
  • This study employs a brain perturbation technique for causal inference regarding brain activity and emotional responses.
  • The research focuses on emotional reactions to extended, naturalistic stimuli, specifically a dance performance.

Purpose of the Study:

  • To investigate the causal role of brain regions involved in subjective emotional ratings.
  • To determine if offline repetitive transcranial magnetic stimulation (rTMS) over specific brain areas alters the appreciation of a dance performance.
  • To explore the neural mechanisms underlying aesthetic experiences.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) identified brain regions correlated with emotional ratings during a 4-minute dance.

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  • Regions of interest were further analyzed using metadata.
  • Low-frequency rTMS was applied to the key identified node in a separate participant group before they rated the dance.

    • Main Results:

    • fMRI showed a negative correlation between emotional judgment and activity in the right posterior parietal cortex, a region typically linked to cognitive tasks.
    • rTMS over the parietal cortex did not affect the overall affective response to the dance.
    • Parietal rTMS significantly enhanced ratings for moments eliciting the highest positive emotional judgments (P<0.05).

    Conclusions:

    • A direct causal link was established between posterior parietal cortex activity and emotional responses to dance.
    • Findings suggest a competition for resources between cognitive functions and emotional processing.
    • The study highlights the potential of brain stimulation techniques in neuroaesthetics research.