Eye Movements Modulate the Spatiotemporal Dynamics of Word Processing
Name
Temereanca-2012-Eye Movements Modula.pdf
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Author(s)
Temereanca, Simona
Hamalainen, Matti S.
Kuperberg, Gina R.
Stufflebeam, Steven M.
Halgren, Eric
Brown, Emery N.
Date Issued
March 2012
Journal
Journal of Neuroscience
Publisher
Society for Neuroscience
Citation
Temereanca, S. et al. “Eye Movements Modulate the Spatiotemporal Dynamics of Word Processing.” Journal of Neuroscience 32.13 (2012): 4482–4494.
Version
Final published version
Abstract
Active reading requires coordination between frequent eye movements (saccades) and short fixations in text. Yet, the impact of saccades on word processing remains unknown, as neuroimaging studies typically employ constant eye fixation. Here we investigate eye-movement effects on word recognition processes in healthy human subjects using anatomically constrained magnetoencephalography, psychophysical measurements, and saccade detection in real time. Word recognition was slower and brain responses were reduced to words presented early versus late after saccades, suggesting an overall transient impairment of word processing after eye movements. Response reductions occurred early in visual cortices and later in language regions, where they colocalized with repetition priming effects. Qualitatively similar effects occurred when words appeared early versus late after background movement that mimicked saccades, suggesting that retinal motion contributes to postsaccadic inhibition. Further, differences in postsaccadic and background-movement effects suggest that central mechanisms also contribute to postsaccadic modulation. Together, these results suggest a complex interplay between visual and central saccadic mechanisms during reading.
MIT Department
Harvard University--MIT Division of Health Sciences and Technology
Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1523/jneurosci.5571-11.2012
