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Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia
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Published on: July 2, 2013

How the brain repairs stuttering.

Christian A Kell1, Katrin Neumann, Katharina von Kriegstein

  • 1Brain Imaging Center, Department of Neurology, Theodor Stern Kai 7, Frankfurt, Germany. c.kell@em.uni-frankfurt.de

Brain : a Journal of Neurology
|August 28, 2009
PubMed
Summary

Adults with persistent stuttering show brain compensation. Optimal recovery in stuttering involves specific orbitofrontal cortex activation, indicating successful late brain repair and reorganization.

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Area of Science:

  • Neuroscience
  • Neurology
  • Speech and Language Pathology

Background:

  • Stuttering is a neurodevelopmental disorder linked to structural anomalies in the left inferior frontal lobe.
  • While many children recover, some adults experience spontaneous recovery from stuttering, offering insights into brain plasticity.
  • Understanding late-stage recovery mechanisms is crucial for differentiating optimal repair from compensatory strategies.

Purpose of the Study:

  • To investigate the neural mechanisms distinguishing spontaneous adult recovery from persistent stuttering.
  • To compare brain activity and structural integrity in recovered adults versus those still affected by stuttering.
  • To identify neural markers of optimal brain repair in late-stage neurodevelopmental disorders.

Main Methods:

  • Utilized neuroimaging techniques to examine brain structure and function in adults who stuttered and recovered, compared to persistent stutterers.
  • Analyzed patterns of brain region activation and white matter integrity.
  • Correlated neural findings with recovery status and compensatory strategies.

Main Results:

  • Persistent stuttering is associated with compensatory activation in brain regions contralateral to initial structural anomalies.
  • Optimal recovery in stuttering is marked by activation in the left BA 47/12 of the orbitofrontal cortex.
  • White matter anomalies near BA 47/12 were present in persistent stutterers but normalized in recovered individuals.

Conclusions:

  • Late-stage recovery from neurodevelopmental stuttering follows principles of contralateral and perianomalous reorganization.
  • Specific orbitofrontal cortex activation is a key neural indicator of successful, unassisted recovery from stuttering in adulthood.
  • These findings advance our understanding of brain repair mechanisms beyond typical developmental windows.