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Related Experiment Videos

What the brain does before the tongue slips.

Jürn Möller1, Bernadette M Jansma, Antoni Rodriguez-Fornells

  • 1Department of Neuropsychology, Otto von Guericke University, 39106 Magdeburg, Germany.

Cerebral Cortex (New York, N.Y. : 1991)
|July 13, 2006
PubMed
Summary

Researchers identified brain activity in the supplementary motor area preceding speech errors like spoonerisms. This suggests competing phonetic speech plans, not just abstract errors, cause these sound mistakes.

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Area of Science:

  • Neuroscience
  • Psycholinguistics
  • Speech Science

Background:

  • Speech production is rapid and typically error-free.
  • Psycholinguistic models propose error monitoring, but brain regions involved are unclear.

Purpose of the Study:

  • Investigate brain regions responsible for speech error detection and correction.
  • Examine the neural basis of spoonerisms, a type of speech sound error.

Main Methods:

  • Utilized event-related brain potentials (ERPs).
  • Employed a task designed to elicit spoonerisms.
  • Applied source modeling to localize brain activity.

Main Results:

  • Identified specific brain activity preceding spoonerism vocalization.

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  • Localized this pre-vocalization activity to the supplementary motor area (SMA) in the medial frontal cortex.

    • Conclusions:

    • The SMA activity may reflect simultaneous activation of competing phonetic speech plans.
    • Challenges the traditional view that sound errors stem solely from abstract phonological substitutions.