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Related Experiment Video

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Cross-Modal Multivariate Pattern Analysis

Cross-Modal Multivariate Pattern Analysis

Published on: November 9, 2011

Coding of multisensory temporal patterns in human superior temporal sulcus.

Tömme Noesselt¹, Daniel Bergmann, Hans-Jochen Heinze

¹Department of Biological Psychology, Otto-von-Guericke-Universität Magdeburg Magdeburg, Germany.

Frontiers in Integrative Neuroscience

|September 14, 2012

Summary

This summary is machine-generated.

This study reveals distinct brain regions in the superior temporal sulcus complex (mSTS-c) process audiovisual synchrony and asynchrony. These areas interact differently with prefrontal cortex depending on perceived timing.

Keywords:

audiovisual fMRI human speech temporal perception

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Published on: October 24, 2012

Area of Science:

Neuroscience
Cognitive Psychology
Audiovisual Perception

Background:

Understanding the neural basis of temporal perception is crucial for fields like philosophy, psychology, and neuroscience.
The brain's ability to integrate sensory information over time, especially in speech, is complex and not fully understood.

Purpose of the Study:

To investigate the neural mechanisms underlying the perception of synchrony and asynchrony in audiovisual speech.
To identify specific brain regions involved in processing temporal relationships in multisensory speech stimuli.

Main Methods:

Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
Participants judged the temporal synchrony/asynchrony of audiovisual speech stimuli and reported perceptual changes.
Analysis included hemodynamic responses, regional activation patterns, and functional connectivity between brain areas.

Main Results:

Differential brain activity was observed in the multisensory superior temporal sulcus complex (mSTS-c) and prefrontal cortex for synchronous versus asynchronous stimuli.
Distinct sub-regions within mSTS-c responded preferentially to different temporal relationships (auditory leading, visual leading, synchrony).
Functional connectivity between mSTS-c and prefrontal cortex was stronger during the perception of asynchrony.

Conclusions:

The human STS-c contains specialized sub-regions for processing temporal aspects of audiovisual speech.
Perception of audiovisual synchrony/asynchrony involves differential engagement of mSTS-c sub-regions and modulated connectivity with prefrontal cortex.
Neural activity is influenced by both stimulus properties and subjective perceptual state.