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Online Effects of Beta-tACS Over the Left Prefrontal Cortex on Phonological Decisions.
Moliadze, Vera; Stenner, Tristan; Matern, Sally; Siniatchkin, Michael; Nees, Frauke; Hartwigsen, Gesa.
Afiliación
  • Moliadze V; Institute of Medical Psychology and Medical Sociology, University Medical Center Schleswig Holstein, Kiel University, Kiel, Germany. Electronic address: moliadze@med-psych.uni-kiel.de.
  • Stenner T; Institute of Medical Psychology and Medical Sociology, University Medical Center Schleswig Holstein, Kiel University, Kiel, Germany.
  • Matern S; Institute of Medical Psychology and Medical Sociology, University Medical Center Schleswig Holstein, Kiel University, Kiel, Germany.
  • Siniatchkin M; Clinic for Child and Adolescent Psychiatry and Psychotherapy, Medical Center Bethel, Bielefeld, Germany.
  • Nees F; Institute of Medical Psychology and Medical Sociology, University Medical Center Schleswig Holstein, Kiel University, Kiel, Germany.
  • Hartwigsen G; Lise Meitner Research Group Cognition and Plasticity, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany. Electronic address: hartwigsen@cbs.mpg.de.
Neuroscience ; 463: 264-271, 2021 05 21.
Article en En | MEDLINE | ID: mdl-33722674
The left posterior inferior frontal gyrus in the prefrontal cortex is a key region for phonological aspects of language processing. A previous study has shown that alpha-tACS over the prefrontal cortex applied before task processing facilitated phonological decision-making and increased task-related theta power. However, it is unclear how alpha-tACS affects phonological processing when applied directly during the task. Moreover, the frequency specificity of this effect is also unclear since the majority of neurostimulation studies tested a single frequency only. The present study addressed the question whether and how 10 Hz online tACS affects phonological decisions. To this end, 24 healthy participants received tACS at 10 Hz or 16.18 Hz (control frequency) or sham stimulation over the left prefrontal cortex during task processing in three sessions. As an unexpected finding, 16.18 Hz significantly impaired task accuracy relative to sham stimulation, without affecting response speed. There was no significant difference in phonological task performance between 10 Hz and 16.18 Hz tACS or between 10 Hz and sham stimulation. Our results support the functional relevance of the left prefrontal cortex for phonological decisions and suggest that online beta-tACS may modulate language comprehension.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estimulación Transcraneal de Corriente Directa Tipo de estudio: Prognostic_studies Límite: Humans Idioma: En Revista: Neuroscience Año: 2021 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estimulación Transcraneal de Corriente Directa Tipo de estudio: Prognostic_studies Límite: Humans Idioma: En Revista: Neuroscience Año: 2021 Tipo del documento: Article Pais de publicación: Estados Unidos