Turning visual shapes into sounds: early stages of reading acquisition revealed in the ventral occipitotemporal cortex.
Neuroimage
; 90: 298-307, 2014 Apr 15.
Article
em En
| MEDLINE
| ID: mdl-24370818
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 (50-150 Hz) 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.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Leitura
/
Lobo Temporal
/
Aprendizagem
/
Lobo Occipital
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article