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The dynamics of language production: Fast neuronal circuits in a proactive brain.| old_uid | 11917 |
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| title | The dynamics of language production: Fast neuronal circuits in a proactive brain. |
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| start_date | 2012/12/07 |
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| schedule | 11h-12h |
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| online | no |
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| summary | We produce speech at an immense speed, seemingly effortlessly and with very few errors. Nevertheless, even uttering a single word is a complex cognitive skill requiring the retrieval and orchestration over time of distinct pieces of linguistic knowledge. In the field of language production it is generally agreed upon that the speed and efficiency with which our brain computes words for speech stems (at least) from two important principles: (1) the architecture underlying language production counts on a well organized and timed hierarchical structure and (2) there is a clear separation between automatic retrieval of words which occurs in the initial phases of processing and goal-directed selection which takes place at later stages of speech preparation. In this talk I will challenge these two cemented principles in the field with recent neurophysiological evidence. In a first study, I will discuss MEG data showing rapid parallel retrieval of lexico-semantic and phoneme related representations associated with picture names. In a second study, I will present ERP data showing proactive modulations of the lexical network in function of a speaker's goal-directed intention. I will argue that these data sets are hard to reconcile with the traditional views on the spatio-temporal dynamics in language production and instead favor a conception of speech in which the different linguistic representations are subserved by overlapping neuronal circuits in a proactive brain. |
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| responsibles | Pélissier |
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