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Updated: Jul 5, 2026
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Transcranial Direct Current Stimulation (tDCS) of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition
Published on: July 13, 2019
Distinct brain representations for early and late learned words
Christian J Fiebach1, Angela D Friederici, Karsten Müller
1Department of Neuropsychology, Max Planck Institute of Cognitive Neuroscience, PO Box 500 355, D-04303 Leipzig, Germany. fiebach@cns.mpg.de
Neuroimage
|September 2, 2003
Summary
Early learned words activate different brain areas than late learned words, suggesting distinct neural representations. Age of word acquisition (AoA) is a key factor in lexical processing and word recognition.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Psycholinguistics
Background:
- Renewed interest in cognitive psychology regarding age of word acquisition (AoA) effects on lexical processing.
- Uncertainty exists whether AoA or word frequency better predicts word recognition.
- No prior studies have investigated the neural bases of the AoA effect or dissociated it from word frequency.
Purpose of the Study:
- Investigate the neural bases of the AoA effect.
- Dissociate the neural correlates of AoA from word frequency.
- Examine how AoA influences neural activity during lexical processing.
Main Methods:
- Event-related functional magnetic resonance imaging (fMRI) experiment.
- Visual and auditory presentation of words.
- Analysis of neural activity modulated by AoA and word frequency.
Main Results:
- Age of word acquisition (AoA) modulates distinct brain areas, independent of word frequency.
- Early learned words activated the precuneus (auditory/visual) and auditory cortex (reading).
- Late learned words showed increased activation in lateral inferior frontal areas.
Conclusions:
- Findings support models proposing differential brain representation for early and late learned words.
- Early learned words are represented more sensorially than late learned words.
- AoA significantly influences neural processing and representation of words.
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