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Assessment of sensorimotor cortical representation asymmetries and motor skills in violin players.

机译:评估小提琴演奏者的感觉运动皮层表示不对称和运动技能。

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As a model for use-dependent plasticity, the brains of professional musicians have been extensively studied to examine structural and functional adaptation to unique requirements of skilled performance. Here we provide a combination of data on motor performance and hand representation in the primary motor and somatosensory cortex of professional violin players, with the aim of assessing possible behavioural consequences of sensorimotor cortical asymmetries. We studied 15 healthy right-handed professional violin players and 35 healthy nonmusician controls. Motor and somatosensory cortex asymmetry was assessed by recording the motor output map after transcranial magnetic stimulation from a small hand muscle, and by dipole source localization of somatosensory evoked potentials after electrical stimulation of the median and ulnar nerves. Motor performance was examined using a series of standardized motor tasks covering different aspects of hand function. Violin players showed a significant right-larger-than-left asymmetry of the motor and somatosensory cortex, whereas nonmusician controls showed no significant interhemispheric difference. The amount of asymmetry in the motor and somatosensory cortices of musicians was significantly correlated. At the behavioural level, motor performance did not significantly differ between musicians and nonmusicians. The results support a use-dependent enlargement of the left hand representation in the sensorimotor cortex of violin players. However, these cortical asymmetries were not paralleled by accompanying altered asymmetries at a behavioural level, suggesting that the reorganisation might be task-specific and does not lead to improved motor abilities in general.
机译:作为依赖于使用的可塑性的模型,已经对专业音乐家的大脑进行了广泛研究,以检查其结构和功能对技术性能的独特要求的适应性。在这里,我们提供了有关专业小提琴演奏者的主要运动和体感皮层的运动表现和手部表现的数据组合,目的是评估感觉运动皮层不对称的可能行为后果。我们研究了15位健康的右手专业小提琴演奏者和35位健康的非音乐人对照。通过记录来自小手部肌肉的经颅磁刺激后的运动输出图,以及通过电刺激正中和尺神经后的体感诱发电位的偶极子源定位,来评估运动和体感皮层的不对称性。使用一系列涵盖手功能不同方面的标准化运动任务来检查运动性能。小提琴演奏者的运动皮层和体感皮层显示出明显的左右不对称,而非音乐人的对照则没有明显的半球间差异。音乐家的运动皮层和体感皮层中的不对称量显着相关。在行为方面,音乐家和非音乐家之间的运动表现没有显着差异。结果支持小提琴演奏者的感觉运动皮层中左手代表的使用依赖的扩大。但是,这些皮层不对称性并没有伴随着行为水平上伴随的不对称性改变,这表明重组可能是针对特定任务的,通常不会导致运动能力的改善。

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