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Updated: Feb 24, 2026
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Decomposing the Variance in Reading Comprehension to Reveal the Unique and Common Effects of Language and Decoding
Published on: October 11, 2018
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The reading brain - Transforming vision into language
Avniel Singh Ghuman1, Julie A Fiez2, Matthew J Boring3
1Center for Neuroscience at the University of Pittsburgh, University of Pittsburgh, Pittsburgh, PA 15213, USA; Center for the Neural Basis of Cognition, University of Pittsburgh and Carnegie Mellon University, Pittsburgh, PA 15213, USA; Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA; Brain Institute, University of Pittsburgh, Pittsburgh, PA 15213, USA; Department of Psychology, University of Pittsburgh, Pittsburgh, PA 15213, USA.
Progress in Neurobiology
|February 22, 2026
Summary
Literacy emerges as the brain tunes existing visual circuits for reading. The visual word form area (VWFA) is crucial, integrating visual input with language networks for skilled reading acquisition.
Area of Science:
- Neuroscience
- Cognitive Science
- Developmental Psychology
Background:
- Reading relies on transforming written words into sounds and meanings.
- Neural circuits for reading are not evolved but rather repurposed existing visual networks.
- The visual word form area (VWFA) is a critical brain region for reading, located in the ventral occipitotemporal cortex.
Purpose of the Study:
- To explore the neural basis of reading and how visual networks adapt for literacy.
- To investigate the role of the VWFA in visuolinguistic transformations.
- To present a model for how reading emerges from the specialization of pre-existing neural circuits.
Main Methods:
- Review of neurophysiological evidence.
- Analysis of neuroanatomical data.
- Examination of neurodevelopmental findings related to reading acquisition.
Main Results:
- Evidence suggests pre-existing visuolinguistic circuits are tuned for reading during development.
- The VWFA's location supports its role in integrating visual processing with language networks.
- Reading deficits correlate with impairments in visuolinguistic transformations.
Conclusions:
- Literacy arises from the specialization of neural circuits with inherent capacities for visual-to-linguistic transformations.
- The VWFA is strategically positioned to receive visual input and connect with auditory-visual speech and language networks.
- This model explains how the brain adapts for fluent reading through the repurposing of visual processing networks.
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