caa a22 4500 445354100 CHVBK 20180317142854.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s00221-010-2448-3 doi (NATIONALLICENCE)springer-10.1007/s00221-010-2448-3 Modulation of the response to a somatosensory stimulation of the hand during the observation of manual actions [Elektronische Daten] [Julien Voisin, Erika Rodrigues, Sébastien Hétu, Philip Jackson, Claudia Vargas, Francine Malouin, C. Chapman, Catherine Mercier] Observation of hand movements has been repeatedly demonstrated to increase the excitability of the motor cortical representation of the hand. Little attention, however, has been devoted to its effect on somatosensory processing. Movement execution is well known to decrease somatosensory cortical excitability, a phenomenon termed ‘gating'. As executed and observed actions share common cortical representations, we hypothesized that action observation (hand movements) should also modulate the cortical response to sensory stimulation of the hand. Seventeen healthy subjects participated in these experiments in which electroencephalographic (EEG) recordings of the somatosensory steady-state response (SSSR) were obtained. The SSSR provides a continuous measure of somatosensory processing. Recordings were made during a baseline condition and five observation conditions in which videos showed either a: (1) hand action; (2) passive stimulation of a hand; (3) static hand; (4) foot action; or (5) static object. The method employed consisted of applying a continuous 25Hz vibratory stimulation to the index finger during the six conditions and measuring potential gating effects in the SSSR within the 25Hz band (corresponding to the stimulation frequency). A significant effect of condition was found over the contralateral parietal cortex. Observation of hand actions resulted in a significant gating effect when compared to baseline (average gating of 22%). Observation of passive touch of the hand also gated the response (17% decrease). In conclusion, the results show that viewing a hand performing an action or being touched interferes with the processing of somatosensory information arising from the hand. Springer-Verlag, 2010 EEG nationallicence Gating nationallicence Shared representations nationallicence Mirror neurons nationallicence Action observation nationallicence Voisin Julien Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut Rodrigues Erika IBCCF, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil aut Hétu Sébastien Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut Jackson Philip Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut Vargas Claudia IBCCF, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil aut Malouin Francine Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut Chapman C. Groupe de recherche sur le système nerveux central, Département de physiologie & École de réadaptation, Université de Montréal, Montreal, QC, Canada aut Mercier Catherine Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut Experimental Brain Research Springer-Verlag 208/1(2011-01-01), 11-19 0014-4819 208:1<11 2011 208 221 https://doi.org/10.1007/s00221-010-2448-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-010-2448-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Voisin Julien Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut NATIONALLICENCE 700 1- Rodrigues Erika IBCCF, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil aut NATIONALLICENCE 700 1- Hétu Sébastien Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut NATIONALLICENCE 700 1- Jackson Philip Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut NATIONALLICENCE 700 1- Vargas Claudia IBCCF, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil aut NATIONALLICENCE 700 1- Malouin Francine Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut NATIONALLICENCE 700 1- Chapman C. Groupe de recherche sur le système nerveux central, Département de physiologie & École de réadaptation, Université de Montréal, Montreal, QC, Canada aut NATIONALLICENCE 700 1- Mercier Catherine Institut de réadaptation en déficience physique de Québec, Centre interdisciplinaire de recherche en réadaptation et en intégration sociale, 525, boul. Hamel, G1M 2S8, Quebec, QC, Canada aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 208/1(2011-01-01), 11-19 0014-4819 208:1<11 2011 208 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer