Cortical oscillations related to processing congruent and incongruent grapheme-phoneme pairs

Neuroscience Letters
Anthony T HerdmanT W Picton

Abstract

In this study, we investigated changes in cortical oscillations following congruent and incongruent grapheme-phoneme stimuli. Hiragana graphemes and phonemes were simultaneously presented as congruent or incongruent audiovisual stimuli to native Japanese-speaking participants. The discriminative reaction time was 57 ms shorter for congruent than incongruent stimuli. Analysis of MEG responses using synthetic aperture magnetometry (SAM) revealed that congruent stimuli evoked larger 2-10 Hz activity in the left auditory cortex within the first 250 ms after stimulus onset, and smaller 2-16 Hz activity in bilateral visual cortices between 250 and 500 ms. These results indicate that congruent visual input can modify cortical activity in the left auditory cortex.

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Citations

Mar 6, 2007·Journal of Cognitive Neuroscience·Anthony T Herdman, Jennifer D Ryan
Jul 3, 2008·Journal of Cognitive Neuroscience·Dries J W FroyenLeo Blomert
Oct 20, 2006·NeuroImage·Atsuko GunjiChristo Pantev
Oct 23, 2016·Neuropsychologia·Emily S Nichols, Jessica A Grahn
Jul 6, 2010·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Leo Blomert, Dries Froyen
Mar 15, 2018·The European Journal of Neuroscience·Jeroen J StekelenburgJean Vroomen
Feb 23, 2019·Frontiers in Human Neuroscience·Weiyong XuJarmo Arvid Hämäläinen

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