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Self awareness and speech processing: an fMRI study.

Renaud Jardri1, Delphine Pins, Maxime Bubrovszky

  • 1UMR-CNRS 8160, Laboratoire Neurosciences Fonctionnelles et Pathologies, Université Lille II, Centre Hospitalier Universitaire de Lille, France. r-jardri@chru-lille.fr

Neuroimage
|March 17, 2007
PubMed
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This summary is machine-generated.

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This study reveals that distinguishing between producing and hearing speech involves distinct brain networks. A lateral mirror-like system aids speech perception, while a medial self-awareness network is active when hearing one's own voice.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psycholinguistics

Background:

  • Language processing engages motor systems, suggesting shared representations between self and other via mirror-like systems.
  • Self-awareness is hypothesized to involve a neural network distinguishing speech production from perception.

Purpose of the Study:

  • To investigate the neural basis of self-awareness in speech processing using fMRI.
  • To identify brain networks involved in speech perception versus self-generated speech.

Main Methods:

  • fMRI scans of 12 healthy subjects performing two block-design experiments.
  • Experiment 1: Passive speech listening.
  • Experiment 2: Self-generated voice condition versus passive listening.

Related Experiment Videos

Main Results:

  • Speech listening activated a lateral mirror-like network (ventral premotor cortex, superior temporal sulcus, inferior parietal lobule).
  • Self-generated voice activated a medial resting-state network (medial parietal and prefrontal cortices).
  • Deactivation of the medial network and modulation of the inferior parietal lobule correlated with self-awareness in speech processing.

Conclusions:

  • Self-awareness in speech processing relies on differentiating between speech production and listening.
  • Distinct parieto-frontal networks support speech perception and self-awareness during vocalization.