Header

UZH-Logo

Maintenance Infos

Transcranial electrical stimulation improves phoneme processing in developmental dyslexia


Rufener, Katharina Simone; Krauel, Kerstin; Meyer, Martin; Heinze, Hans-Jochen; Zaehle, Tino (2019). Transcranial electrical stimulation improves phoneme processing in developmental dyslexia. Brain Stimulation, 12(4):930-937.

Abstract

BACKGROUND: About 10% of the western population suffers from a specific disability in the acquisition of reading and writing skills, known as developmental dyslexia (DD). Even though DD starts in childhood it frequently continuous throughout lifetime. Impaired processing of acoustic features at the phonematic scale based on dysfunctional auditory temporal resolution is considered as one core deficit underlying DD. Recently, the efficacy of transcranial electrical stimulation (tES) to modulate auditory temporal resolution and phoneme processing in healthy individuals has been demonstrated.
OBJECTIVE: The present work aims to investigate online effects of tES on phoneme processing in individuals with DD.
METHOD: Using an established phoneme-categorization task, we assessed the immediate behavioral and electrophysiological effects of transcranial alternating current stimulation (tACS) and transcranial random noise stimulation (tRNS) over bilateral auditory cortex in children and adolescents with DD (study 1) and adults with DD (study 2) on auditory phoneme processing acuity.
RESULTS: Our data revealed that tACS improved phoneme categorization in children and adolescents with DD, an effect that was paralleled by an increase in evoked brain response patterns representing low-level sensory processing. In the adult sample we replicated these findings and additionally showed a more pronounced impact of tRNS on phoneme-categorization acuity.
CONCLUSION: These results provide compelling evidence for the potential of both tACS and tRNS to increase temporal precision of the auditory system in DD and suggest transcranial electrical stimulation as potential intervention in DD to foster the effect of standard phonology-based training.

Abstract

BACKGROUND: About 10% of the western population suffers from a specific disability in the acquisition of reading and writing skills, known as developmental dyslexia (DD). Even though DD starts in childhood it frequently continuous throughout lifetime. Impaired processing of acoustic features at the phonematic scale based on dysfunctional auditory temporal resolution is considered as one core deficit underlying DD. Recently, the efficacy of transcranial electrical stimulation (tES) to modulate auditory temporal resolution and phoneme processing in healthy individuals has been demonstrated.
OBJECTIVE: The present work aims to investigate online effects of tES on phoneme processing in individuals with DD.
METHOD: Using an established phoneme-categorization task, we assessed the immediate behavioral and electrophysiological effects of transcranial alternating current stimulation (tACS) and transcranial random noise stimulation (tRNS) over bilateral auditory cortex in children and adolescents with DD (study 1) and adults with DD (study 2) on auditory phoneme processing acuity.
RESULTS: Our data revealed that tACS improved phoneme categorization in children and adolescents with DD, an effect that was paralleled by an increase in evoked brain response patterns representing low-level sensory processing. In the adult sample we replicated these findings and additionally showed a more pronounced impact of tRNS on phoneme-categorization acuity.
CONCLUSION: These results provide compelling evidence for the potential of both tACS and tRNS to increase temporal precision of the auditory system in DD and suggest transcranial electrical stimulation as potential intervention in DD to foster the effect of standard phonology-based training.

Statistics

Citations

Altmetrics

Downloads

16 downloads since deposited on 03 May 2019
16 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:06 Faculty of Arts > Institute of Psychology
08 Research Priority Programs > Dynamics of Healthy Aging
Dewey Decimal Classification:150 Psychology
Language:English
Date:1 July 2019
Deposited On:03 May 2019 08:34
Last Modified:22 Jun 2019 01:03
Publisher:Elsevier
ISSN:1876-4754
OA Status:Green
Publisher DOI:https://doi.org/10.1016/j.brs.2019.02.007
PubMed ID:30826318
Project Information:
  • : FunderSNSF
  • : Grant IDP2ZHP1_158941
  • : Project TitleThe influence of brain stimulation on speech-relevant neural oscillation patterns: assessing a novel intervention for Dyslexics.
  • : FunderBi€asch Stiftung zurF€orderung der Angewandten Psychologie
  • : Grant ID
  • : Project Title
  • : FunderDeutsche For-schungsgemeinschaft
  • : Grant IDZA 626/2-1, SFB 779/TP2
  • : Project Title

Download

Download PDF  'Transcranial electrical stimulation improves phoneme processing in developmental dyslexia'.
Preview
Content: Published Version
Language: English
Filetype: PDF
Size: 868kB
View at publisher
Licence: Creative Commons: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)