Sensorimotor adaptation is an important part of our ability to learn to perform novel motor tasks (i.e., learning of motor skills). Efforts to improve adaptation in healthy and clinical patients using non-invasive brain stimulation methods have been hindered by inter-individual and intra-individual variability in brain susceptibility to stimulation. Here, we explore unpredictable loud acoustic stimulation as an alternative method of modulating brain excitability to improve sensorimotor adaptation. In two experiments, participants moved a cursor towards targets, and adapted to a 30 degree rotation of cursor feedback, either with or without unpredictable acoustic stimulation. Acoustic stimulation improved initial adaptation to sensory prediction errors in Study 1, and improved overnight retention of adaptation in Study 2. Unpredictable loud acoustic stimulation might thus be a potent method of modulating sensorimotor adaptation in healthy adults.

中文翻译：

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声学刺激增加感觉运动适应中的内隐适应

感觉运动适应是我们学习执行新的运动任务（即学习运动技能）能力的重要组成部分。个体间和个体内大脑对刺激的易感性阻碍了使用无创性脑刺激方法改善健康和临床患者适应性的努力。在这里，我们探索不可预测的声音刺激作为调节大脑兴奋性以改善感觉运动适应性的替代方法。在两个实验中，参与者在有或没有不可预测的声刺激的情况下将光标移向目标，并适应了光标反馈的30度旋转。在研究1中，声刺激改善了对感觉预测错误的初始适应，在研究2中改善了适应的过夜保留。