Lagravinese Giovanna, Bisio Ambra, Ruggeri Piero, Bove Marco, Avanzino Laura
Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of Genoa, Viale Benedetto XV 3, 16132, Genoa, Italy.
Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of Genoa, Viale Benedetto XV 3, 16132, Genoa, Italy.
Neuropsychologia. 2017 Feb;96:89-95. doi: 10.1016/j.neuropsychologia.2016.09.022. Epub 2016 Oct 18.
The present study was designed to explore the changes in motor performance and motor resonance after multiple sessions of action observation (AO) training. Subjects were exposed to the observation of a video showing finger tapping movements executed at 3Hz, a frequency higher than the spontaneous one (2Hz) for four consecutive days. Motor performance and motor resonance were tested before the AO training on the first day, and on the last day. Results showed that multiple sessions of AO training induced a shift of the speed of execution of finger tapping movements toward the observed one and a change in motor resonance. Before the 3Hz-AO training cortical excitability was highest during the observation of the 2Hz video. This motor resonance effect was lost after one single session of 3Hz-AO training whereas after multiple sessions of 3Hz-AO training cortical excitability was highest during the observation of the 3Hz video. Our study shows for the first time that multiple sessions of AO training are able not only to induce performance gains but also to change the way by which the observer's motor system recognizes a certain movement as belonging to the individual motor repertoire. These results may encourage the development of novel rehabilitative protocols based on multiple sessions of action observation aimed to regain a correct movement when its spontaneous speed is modified by pathologies or to modify the innate temporal properties of certain movements.
本研究旨在探究多次动作观察（AO）训练后运动表现和运动共振的变化。受试者连续四天观看一段视频，视频展示了以3Hz频率执行的手指敲击动作，该频率高于自发频率（2Hz）。在第一天和最后一天的AO训练前以及训练后测试运动表现和运动共振。结果表明，多次AO训练导致手指敲击动作的执行速度向所观察的速度转变，并使运动共振发生变化。在3Hz - AO训练前，观察2Hz视频时皮质兴奋性最高。单次3Hz - AO训练后这种运动共振效应消失，而多次3Hz - AO训练后，观察3Hz视频时皮质兴奋性最高。我们的研究首次表明，多次AO训练不仅能够提高运动表现，还能够改变观察者运动系统将特定动作识别为属于个体运动技能库的方式。这些结果可能会促进基于多次动作观察的新型康复方案的开发，旨在当自发运动速度因疾病而改变时恢复正确的运动，或改变某些运动的固有时间特性。
