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Turning visual shapes into sounds: Early stages of reading acquisition revealed in the ventral occipitotemporal cortex.

Abstract : : The exact role of the left ventral occipitotemporal cortex (VOTC) during the initial stages of reading acquisition is a hotly debated issue, especially regarding the comparative effect of learning on early stimulus-dependent vs. later task-dependent processes. We show that this controversy can be solved with high-temporal resolution intracerebral EEG recordings of the VOTC. We measured High-Frequency Activity (50-150Hz) as a proxy of population-level spiking activity while participants learned Japanese Katakana symbols, and found that learning primarily affects top-down/task-dependent neural processing, after a few minutes only. In contrast, adaptation of early bottom-up/stimulus-dependent processing takes several days to adapt and provides the basis for fluent reading. Such evidence that two consecutive stages of neural processing, stimulus- and task-dependent are differentially affected by learning, can reconcile seemingly opposite hypotheses on the role of the VOTC during reading acquisition.
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https://hal.archives-ouvertes.fr/hal-00929695
Contributor : Marcela Perrone-Bertolotti Connect in order to contact the contributor
Submitted on : Monday, January 13, 2014 - 4:35:58 PM
Last modification on : Tuesday, April 12, 2022 - 10:12:06 AM

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Marcela Perrone-Bertolotti, J. R. Vidal, L. de Palma, C. M. Hamamé, T. Ossandon, et al.. Turning visual shapes into sounds: Early stages of reading acquisition revealed in the ventral occipitotemporal cortex.. NeuroImage, Elsevier, 2014, 90, pp.298-307. ⟨10.1016/j.neuroimage.2013.12.027⟩. ⟨hal-00929695⟩

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