Prefrontal control during a semantic decision task that involves idiom comprehension: A transcranial direct current stimulation study

► The study examined the effects of tDCS over the DLPFC on idiom processing. ► We also tested whether tDCS over prefrontal areas may be biased by motivational mechanisms. ► We found that tDCS can modulate figurative language comprehension. ► The DLPFC regulates top-down processing in idiom comprehension. ► Trait motivation moderates tDCS effectiveness over performance.