Rhythmic auditory stimuli (RAS) have been proposed to improve motor performance in populations with and without sensorimotor impairments. However, the reasons for the reported benefits are poorly understood. One idea is that RAS may supplement intrinsic feedback when other sensory input is diminished. The current experiment tested this idea by removing vision during a goal-directed reaching task. We hypothesized that any improvements in movement performance due to the RAS would be greater when vision was removed. Twenty-two typically developing adults performed reaching movements to one of two targets with RAS presented before movement initiation, after movement initiation, both before and after movement initiation, and no sound, all with and without vision. Dependent variables were analyzed using a 2 vision by 2 sound-before by 2 sound-during repeated measures ANOVA. Conditions where the metronome was heard before movement initiation yielded shorter and less variable reaction times compared when there was no sound before the movement. The RAS heard before and during the movement independently impacted spatial aspects of the movement. Sound before movement initiation resulted in smaller endpoint error, primarily in the anterior-posterior axis. Sound during the movement resulted in smaller endpoint error, primarily in the mediolateral axis. In no-vision blocks, inclusion of RAS resulted in improved endpoint performance, indicating that RAS supplemented the motor system. The present results strengthen our understanding of sensory integration underlying reaching performance by demonstrating that sound heard before and during a reaching movement can improve motor performance by supplementing the motor system when vision is unavailable.

中文翻译：

---

在到达运动之前和期间听到的有节奏的听觉刺激引起时空运动参数的性能改善。

有节奏的听觉刺激（RAS）已被提出来改善有或没有感觉运动障碍的人群的运动表现。但是，对所报告收益的原因了解甚少。一个想法是，当其他感官输入减少时，RAS可以补充内在反馈。当前的实验通过在目标定向的达成任务中消除视力来测试该想法。我们假设去除视力后，由于RAS而导致的运动表现的任何改善都会更大。22名典型发育中的成年人在运动开始之前，运动开始之后，运动开始之前和之后均达到了达到两个目标之一的目标，其中RAS在运动的前后都没有声音。重复测量方差分析使用2视野2声音-2声音-重复测量方差分析分析因变量。与运动前没有声音的情况相比，运动开始前听到节拍器的条件产生的响应时间更短，变化时间更少。运动之前和运动期间听到的RAS独立影响运动的空间方面。运动开始之前的声音会导致较小的终点误差，主要在前后轴上。运动期间的声音导致较小的终点误差，主要在中外侧轴上。在无视区中，包含RAS可以改善端点性能，表明RAS补充了运动系统。