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Related Experiment Video

Updated: May 29, 2026

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
08:45

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

Published on: October 24, 2012

When and where of auditory spatial processing in cortex: a novel approach using electrotomography.

Jörg Lewald1, Stephan Getzmann

  • 1Department of Cognitive Psychology, Faculty of Psychology, Ruhr University Bochum, Bochum, Germany. joerg.lewald@rub.de

Plos One
|September 28, 2011
PubMed
Summary

Brain activity processing of sound location occurs in distinct auditory pathways at different times. Early N1 responses involve the primary auditory cortex, while later P2 responses engage anteroventral pathways for spatial analysis.

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Area of Science:

  • Neuroscience
  • Auditory Perception
  • Brain Imaging

Background:

  • Understanding how the brain processes sound location is crucial for auditory perception.
  • Natural spatial cues provide rich information for sound localization.

Purpose of the Study:

  • To investigate the modulation of brain activity based on auditory location.
  • To identify the specific cortical areas and timing involved in sound spatial processing.

Main Methods:

  • Electro-encephalography (EEG) combined with low-resolution brain electromagnetic tomography (LORETA).
  • Auditory stimuli presented in free-field anechoic conditions with natural spatial cues.
  • Analysis of electrical activity during N1 and P2 components of auditory evoked potentials.

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Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents
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Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents

Published on: May 23, 2025

Related Experiment Videos

Last Updated: May 29, 2026

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
08:45

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

Published on: October 24, 2012

Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents
07:52

Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents

Published on: May 23, 2025

Main Results:

  • A double dissociation was observed between cortical locations and processing time.
  • Spatial processing in the primary auditory cortex and posterodorsal pathway occurred at the N1 response.
  • Spatial processing in anteroventral pathways occurred later, around the P2 response.

Conclusions:

  • Both primary and secondary auditory pathways contribute to sound spatial analysis, but at distinct temporal stages.
  • The anteroventral pathway's later involvement may reflect integration of spatial and non-spatial sound features or shared processing resources.