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Related Experiment Video

Updated: Jun 12, 2026

Infant Auditory Processing and Event-related Brain Oscillations

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

How does learning to read affect speech perception?

Chotiga Pattamadilok¹, Iris N Knierim, Keith J Kawabata Duncan

¹Unité de Recherche en Neurosciences Cognitives, Université Libre de Bruxelles, B-1050 Brussels, Belgium. cpattama@ulb.ac.be

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|June 25, 2010

Summary

This summary is machine-generated.

Learning to read impacts spoken language processing by altering phonological representations, not orthographic ones. This study used transcranial magnetic stimulation (TMS) to confirm the left supramarginal gyrus (SMG) role in this phonological shift.

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Area of Science:

Neuroscience
Cognitive Science
Psycholinguistics

Background:

Literacy acquisition demonstrably influences spoken language processing.
The precise neural mechanisms behind these orthographic effects remain debated.
Two hypotheses exist: changes in phonological representations or online coactivation.

Purpose of the Study:

Investigate the neural basis of orthographic effects on speech processing.
Differentiate between phonological representation changes and coactivation hypotheses.
Determine the role of specific brain regions in literacy-influenced speech perception.

Main Methods:

Utilized auditory lexical decision tasks with manipulated orthographic consistency.
Employed repetitive transcranial magnetic stimulation (TMS) to disrupt specific brain areas.
Targeted left supramarginal gyrus (SMG) for phonological processing and left ventral occipitotemporal cortex (vOTC) for orthographic processing.

Main Results:

The orthographic consistency advantage for spoken words was abolished by TMS to the SMG.
Stimulation of the vOTC did not affect this advantage.
Findings indicate the effect is rooted in phonological processing, not orthographic processing.

Conclusions:

The left supramarginal gyrus (SMG) plays a critical role in phonological processing affected by reading acquisition.
Orthographic influences on speech processing emerge from changes in phonological representations.
This research clarifies the neural underpinnings of how reading shapes auditory language perception.