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Robust multisensory deviance detection in the mouse parietal associative area.

Alice B Van Derveer1, Jordan M Ross2, Jordan P Hamm3

  • 1Neuroscience Institute, Georgia State University, Petit Science Center, 100 Piedmont Avenue, Atlanta, GA 30303, USA.

Current Biology : CB
|August 29, 2023
PubMed
Summary

Neural deviance detection, or amplified brain responses to unusual stimuli, occurs hierarchically. Complex multisensory stimuli trigger this in higher cortical areas, unlike simple stimuli in primary sensory cortex.

Keywords:
cerebral cortexintegrationmismatch negativitymultisensoryparietalperceptionprediction errorpredictive coding

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Processing

Background:

  • Context significantly influences information processing in the mammalian brain.
  • Deviance detection, an amplified neural response to unusual stimuli, is well-documented in primary sensory cortex for simple, low-order stimulus properties.

Purpose of the Study:

  • To investigate the manifestation of neural deviance detection in broader cortical networks.
  • To determine if deviance detection extends to complex, higher-order, multisensory stimuli.

Main Methods:

  • Examined brain responses in awake mice to both simple unisensory and complex multisensory deviants.
  • Compared deviance detection in primary visual cortex versus the parietal associative area.

Main Results:

  • The parietal associative area, a higher cortical region, demonstrated robust multisensory deviance detection.
  • Primary visual cortex showed strong unisensory visual deviance detection but weaker multisensory detection.

Conclusions:

  • Deviance detection appears to manifest hierarchically across cortical networks, emerging later for complex stimuli.
  • These findings support a predictive processing framework, conceptualizing deviance detection as 'prediction errors' fed forward in cortical networks.