Stability-dependent behavioural and electro-cortical reorganizations during intentional switching between bimanual tapping modes |
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Authors: | Jessica Tallet,Jé rô me Barral,Clara James,Claude-Alain Hauert |
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Affiliation: | 1. Université de Toulouse, UPS, LAPMA, Toulouse, France;2. Institut des Sciences du Sport de l’Université de Lausanne, Switzerland;3. Faculté de Psychologie et des Sciences de l’Education, Université de Genève, Switzerland;4. Geneva Neuroscience Center, University of Geneva, Switzerland |
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Abstract: | This study investigated behavioural and electro-cortical reorganizations accompanying intentional switching between two distinct bimanual coordination tapping modes (In-phase and Anti-phase) that differ in stability when produced at the same movement rate. We expected that switching to a less stable tapping mode (In-to-Anti switching) would lead to larger behavioural perturbations and require supplementary neural resources than switching to a more stable tapping mode (Anti-to-In switching). Behavioural results confirmed that the In-to-Anti switching lasted longer than the Anti-to-In switching. A general increase in attention-related neural activity was found at the moment of switching for both conditions. Additionally, two condition-dependent EEG reorganizations were observed. First, a specific increase in cortico-cortical coherence appeared exclusively during the In-to-Anti switching. This result may reflect a strengthening in inter-regional communication in order to engage in the subsequent, less stable, tapping mode. Second, a decrease in motor-related neural activity (increased beta spectral power) was found for the Anti-to-In switching only. The latter effect may reflect the interruption of the previous, less stable, tapping mode. Given that previous results on spontaneous Anti-to-In switching revealing an inverse pattern of EEG reorganization (decreased beta spectral power), present findings give new insight on the stability-dependent neural correlates of intentional motor switching. |
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Keywords: | Motor intention Inhibition Coordination Electroencephalography Functional coupling |
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