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Localizing the lexicon for reading aloud:replication of a PET study using fMRI
S L Small1, D C Noll, C A Perfetti
1Department of Neurology, University of Pittsburgh, PA 15261-2003, USA.
Neuroreport
|March 22, 1996
Summary
Functional magnetic resonance imaging (fMRI) revealed the brain
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Neuroimaging
Background:
- Understanding the neural mechanisms of reading is crucial for cognitive science.
- Previous research has implicated various brain regions in visual word processing.
Purpose of the Study:
- To investigate the neural basis of written word recognition using fMRI.
- To identify specific brain areas involved in processing written words.
Main Methods:
- Used functional magnetic resonance imaging (fMRI) with a 1.5T scanner.
- Acquired T2 gradient echo images during word reading and a control task (visualizing false fonts).
- Employed an alternating block design (30s on/30s off) for 4 minutes, analyzing data with cross-correlation.
Main Results:
- Demonstrated strong activation in the left posterior superior temporal gyrus in both subjects.
- This activation site aligns with predictions for the visual input lexicon.
Conclusions:
- The left posterior superior temporal gyrus plays a significant role in written word recognition.
- fMRI is a valuable tool for localizing cognitive functions in the brain.