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  • Title: Subliminal display of action words interferes with motor planning: a combined EEG and kinematic study.
    Author: Boulenger V, Silber BY, Roy AC, Paulignan Y, Jeannerod M, Nazir TA.
    Journal: J Physiol Paris; 2008; 102(1-3):130-6. PubMed ID: 18485678.
    Abstract:
    Recent evidence has shown that processing action-related language and motor action share common neural representations to a point that the two processes can interfere when performed concurrently. To support the assumption that language-induced motor activity contributes to action word understanding, the present study aimed at ruling out that this activity results from mental imagery of the movements depicted by the words. For this purpose, we examined cross-talk between action word processing and an arm reaching movement, using words that were presented too fast to be consciously perceived (subliminally). Encephalogram (EEG) and movement kinematics were recorded. EEG recordings of the "Readiness potential" ("RP", indicator of motor preparation) revealed that subliminal displays of action verbs during movement preparation reduced the RP and affected the subsequent reaching movement. The finding that motor processes were modulated by language processes despite the fact that words were not consciously perceived, suggests that cortical structures that serve the preparation and execution of motor actions are indeed part of the (action) language processing network.
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