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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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Related Experiment Video

Updated: Oct 11, 2025

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
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Task-dependent cortical activations during selective attention to audiovisual speech.

Artturi Ylinen1, Patrik Wikman2, Miika Leminen3

  • 1Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland.

Brain Research
|November 29, 2021
PubMed
Summary

Understanding how the brain processes speech selectively is key. This study shows that the task you perform significantly alters brain activity during selective listening to speech.

Keywords:
Audiovisual speech processingFunctional magnetic resonance imagingSelective attention to speechTask-dependent effects

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Auditory Processing

Background:

  • Selective listening to speech involves complex brain networks.
  • How task demands and speech intelligibility modulate these networks is not fully understood.

Purpose of the Study:

  • To investigate the neural basis of selective attention to continuous audiovisual speech.
  • To examine how different cognitive tasks (semantic vs. phonological) and speech intelligibility affect brain activity.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
  • Participants performed semantic, phonological, or visual control tasks while attending to audiovisual speech under varying intelligibility conditions.

Main Results:

  • Superior temporal and left inferior frontal regions were consistently engaged during selective speech attention.
  • Frontoparietal regions, typically involved in auditory attention, were not activated during the semantic task.
  • Medial orbitofrontal cortex showed increased activation for the semantic task, while phonological task processing engaged left prefrontal and premotor areas.

Conclusions:

  • Task type critically influences neural activation patterns during selective speech attention.
  • Findings highlight the importance of ecologically valid experimental designs for studying speech perception in complex listening environments.