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Functional connectivity changes in adults with developmental stuttering: a preliminary study using quantitative

Kathleen Joos1, Dirk De Ridder2, Ronny A Boey3

  • 1Department of Neurosurgery, University Hospital Antwerp Antwerp, Belgium ; Department of Translational Neuroscience, Faculty of Medicine, University of Antwerp Antwerp, Belgium.

Frontiers in Human Neuroscience
|October 30, 2014
PubMed
Summary
This summary is machine-generated.

Individuals who stutter exhibit altered brain connectivity, with decreased high-frequency connections and increased low-frequency connections linked to speech severity. This suggests maladaptive neural communication patterns in stuttering.

Keywords:
developmental stutteringfunctional connectivityqEEGsLORETAsensorimotor timing deficit

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Area of Science:

  • Neuroscience
  • Speech-Language Pathology

Background:

  • Stuttering involves verbal dysfluencies, potentially stemming from sensorimotor timing deficits and impaired brain communication.
  • Focus on resting-state brain activity and functional connectivity offers insights into stuttering mechanisms.

Purpose of the Study:

  • Investigate resting-state functional connectivity differences in individuals who stutter (PWS) compared to controls.
  • Correlate functional connectivity with stuttering severity and quality of life.

Main Methods:

  • Included 11 patients with developmental stuttering and 11 controls.
  • Utilized Dutch Test for Stuttering Severity-Readers (TSS-R) and Overall Assessment of the Speaker's Experience of Stuttering (OASES).
  • Employed standardized low-resolution brain electromagnetic tomography (sLORETA) for connectivity analysis.

Main Results:

  • No significant differences in neural activity were found.
  • Significant alterations in resting-state functional connectivity were observed, particularly interhemispheric.
  • Decreased high-frequency (beta, gamma) connectivity between motor speech areas and contralateral premotor/motor areas in PWS.
  • Positive correlation between low-frequency (theta, alpha) connectivity and stuttering severity.
  • Mixed connectivity patterns correlated with quality of life.

Conclusions:

  • PWS show decreased high-frequency interhemispheric functional connectivity in motor speech areas during rest.
  • Increased low-frequency connectivity correlates with more severe speech disturbances.
  • Suggests that heightened interhemispheric and right-sided functional connectivity may be maladaptive in stuttering.