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Related Experiment Videos

Cortical plasticity associated with stuttering therapy.

Katrin Neumann1, Christine Preibisch, Harald A Euler

  • 1Clinic of Phoniatry und Pedaudiology, University of Frankfurt/Main, Germany. Katrin.Neumann@em.uni-frankfurt.de

Journal of Fluency Disorders
|March 17, 2005
PubMed
Summary
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Fluency shaping therapy for persistent developmental stuttering (PDS) reorganizes brain circuitry. Treatment leads to increased activation in speech areas, particularly on the left, near white matter anomalies.

Area of Science:

  • Neuroimaging
  • Speech Science
  • Neurology

Background:

  • Persistent developmental stuttering (PDS) is linked to left hemisphere white matter abnormalities and right hemisphere hyperactivity.
  • This right-hemispheric hyperactivity may compensate for structural deficits in speech networks.

Purpose of the Study:

  • To investigate brain activation changes following fluency shaping therapy in adults with PDS.
  • To identify specific brain regions affected by therapy and their relation to known white matter anomalies.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to assess brain activity.
  • Nine adult males with PDS were scanned before and after 12 weeks of fluency shaping therapy.
  • Brain response differences during overt sentence reading were analyzed.

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Main Results:

  • Post-therapy fMRI revealed more widespread activation in speech and language regions across both hemispheres, especially the left.
  • Increased left-sided activation was observed adjacent to previously identified white matter abnormalities in PDS.
  • These findings suggest therapy-induced reorganization of neuronal communication.

Conclusions:

  • Fluency shaping therapy appears to remodel brain circuitry near the site of dysfunction in PDS.
  • Therapeutic mechanisms may involve direct re-functionalization of left-hemispheric speech networks rather than solely contralateral compensation.