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Abstract：
Transcranial direct current stimulation (tDCS) can improve visual perception. However, the effect of tDCS on visual perception is largely variable, possibly due to individual differences in initial performance. The goal of the present study was to evaluate the dependency of visual motion perception improvements on initial performance. Twenty-eight observers were randomly divided into two groups. Anodal tDCS and sham stimulation were separately applied to V5 (1.5 mA, 20 min), while observers performed a coherent motion direction identification task. The results showed that compared to sham stimulation, anodal tDCS induced a significant improvement in motion perception that lasted at least 20 min. In addition, the degree of improvement was dependent on initial performance, with a greater improvement magnitude observed for those with poorer initial performance. These results may have implications for understanding the nature of the stimulation rule and for the use of a customised stimulation protocol to enhance tDCS efficiency in practical applications.
摘要：
经颅直流电刺激（tDCS）可以改善视觉感知。然而,TDCS对视觉感知的影响在很大程度上是可变的，可能是由于初始表现的个体差异。本研究的目的是评估视觉运动感知改善对初始性能的依赖性。28名观察者被随机分为两组。阳极tDCS和假刺激分别应用于V5(1.5mA，20分钟),而观察者执行连贯的运动方向识别任务。结果表明，与假刺激相比，阳极tDCS引起了至少20分钟的运动知觉的显着改善。此外,改善的程度取决于最初的表现，对于那些初始性能较差的人，观察到了更大的改善幅度。这些结果可能对理解刺激规则的性质以及使用定制的刺激方案以提高实际应用中的tDCS效率具有影响。
