Online Effects of Beta-tACS Over the Left Prefrontal Cortex on Phonological Decisions

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 applied before task processing facilitated decision-making and increased task-related theta power. However, it unclear how affects when directly during task. Moreover, frequency specificity this effect also since majority neurostimulation studies tested single only. present addressed question whether 10 Hz online tACS decisions. To end, 24 healthy participants received at or 16.18 (control frequency) sham stimulation three sessions. As an unexpected finding, significantly impaired accuracy relative to stimulation, without affecting response speed. There was no significant difference performance between stimulation. Our results support functional relevance decisions suggest beta-tACS may modulate comprehension.