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Updated: Jun 13, 2026
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A Two-interval Forced-choice Task for Multisensory Comparisons
Published on: November 9, 2018
Interhemispheric coupling between the posterior sylvian regions impacts successful auditory temporal order judgment
Fosco Bernasconi1, Jeremy Grivel, Micah M Murray
1Neuropsychology and Neurorehabilitation Service, Vaudois University Hospital Center and University of Lausanne, Lausanne, Switzerland.
Neuropsychologia
|May 12, 2010
Summary
Accurate auditory temporal order judgment relies on early brain activity in the left posterior sylvian regions (PSR). Performance depends on the functional decoupling between left and right PSR networks.
Area of Science:
- Neuroscience
- Auditory Perception
- Cognitive Science
Background:
- Accurate perception of temporal order is crucial for various cognitive functions.
- Auditory temporal order judgment (aTOJ) involves processing the sequence of sounds.
Purpose of the Study:
- To investigate the spatio-temporal brain dynamics of aTOJ.
- To identify brain regions and network interactions critical for accurate temporal order perception.
Main Methods:
- Electrical neuroimaging analyses of auditory evoked potentials (AEPs).
- Near-threshold auditory task requiring spatial discrimination of sound sequences.
- Source estimations and correlation analyses of brain activity.
Main Results:
- Auditory evoked potentials showed topographic modulation related to aTOJ accuracy (39-77ms post-stimulus).
- Bilateral posterior sylvian regions (PSR) activity was linked to performance accuracy.
- Left PSR activity predicted behavioral performance, while functional decoupling between left and right PSR was crucial for accuracy.
Conclusions:
- Left PSR activity during early auditory encoding is critical for perceiving sound order.
- Accurate aTOJ depends on functional decoupling between homologous PSR areas.
- A model is proposed where temporal information is extracted in left PSR and modulated by right PSR inputs.
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