Language perception activates the hand motor cortex: implications for motor theories of speech perception
| Autor: | Caterina Breitenstein, Tanja Ellger, Agnes Flöel, Stefan Knecht |
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| Rok vydání: | 2003 |
| Předmět: |
Adult
Male Aging Speech production Speech perception media_common.quotation_subject Models Psychological Motor Activity Magnetics Perception Humans Dominance Cerebral Mirror neuron Language media_common Motor theory of speech perception Electromyography General Neuroscience Motor Cortex Evoked Potentials Motor Hand Electric Stimulation Reading Speech Perception Female Neurocomputational speech processing Psychology Spoken language Cognitive psychology Gesture |
| Zdroj: | European Journal of Neuroscience. 18:704-708 |
| ISSN: | 1460-9568 0953-816X |
| Popis: | The precise mechanisms of how speech may have developed are still unknown to a large extent. Gestures have proven a powerful concept for explaining how planning and analysing of motor acts could have evolved into verbal communication. According to this concept, development of an action-perception network allowed for coding and decoding of communicative gestures. These were manual or manual/articulatory in the beginning and then became increasingly elaborate in the articulatory mode. The theory predicts that listening to the 'gestures' that compose spoken language should activate an extended articulatory and manual action-perception network. To examine this hypothesis, we assessed the effects of language on cortical excitability of the hand muscle representation by transcranial magnetic stimulation. We found the hand motor system to be activated by linguistic tasks, most notably pure linguistic perception, but not by auditory or visuospatial processing. The amount of motor system activation was comparable in both hemispheres. Our data support the theory that language may have evolved within a general and bilateral action-perception network. |
| Databáze: | OpenAIRE |
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