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Related Experiment Video

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Updated Technique for Reliable, Easy, and Tolerated Transcranial Electrical Stimulation Including Transcranial Direct Current Stimulation
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Transcranial electrical stimulation improves phoneme processing in developmental dyslexia.

Katharina S Rufener1, Kerstin Krauel2, Martin Meyer3

  • 1Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany; Center for Behavioral Brain Sciences, Magdeburg, Germany.

Brain Stimulation
|March 4, 2019
PubMed
Summary
This summary is machine-generated.

Transcranial electrical stimulation (tES) improved phoneme processing in individuals with developmental dyslexia (DD). Both transcranial alternating current stimulation (tACS) and transcranial random noise stimulation (tRNS) show potential to enhance auditory temporal resolution in DD.

Keywords:
Auditory temporal resolutionDevelopmental dyslexiaPhoneme processingTranscranial alternating current stimulationTranscranial random noise stimulation

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Area of Science:

  • Neuroscience
  • Auditory Processing
  • Developmental Disorders

Background:

  • Developmental dyslexia (DD) affects 10% of the Western population, often persisting into adulthood.
  • A core deficit in DD is impaired auditory temporal resolution, affecting phonemic processing.
  • Transcranial electrical stimulation (tES) has shown promise in modulating auditory temporal resolution in healthy individuals.

Purpose of the Study:

  • To investigate the immediate effects of tES on phoneme processing in individuals with DD.
  • To assess behavioral and electrophysiological changes in auditory phoneme processing acuity.

Main Methods:

  • Utilized a phoneme-categorization task to evaluate auditory processing.
  • Applied transcranial alternating current stimulation (tACS) and transcranial random noise stimulation (tRNS) over the bilateral auditory cortex.
  • Studied both children/adolescents and adults with DD.

Main Results:

  • tACS enhanced phoneme categorization in children and adolescents with DD, correlating with improved low-level sensory processing.
  • In adults, tACS effects were replicated, with tRNS showing a more significant impact on phoneme-categorization acuity.
  • Both tACS and tRNS demonstrated improvements in auditory processing.

Conclusions:

  • tACS and tRNS show potential for enhancing temporal precision in the auditory system of individuals with DD.
  • Transcranial electrical stimulation may serve as a valuable intervention to augment standard phonology-based training for DD.