Bieck Silke M, Artemenko Christina, Moeller Korbinian, Klein Elise
LEAD Graduate School & Research Network, University of Tuebingen, Tuebingen, Germany.
Leibniz-Institut für Wissensmedien, Tuebingen, Germany.
Front Neurosci. 2018 Apr 5;12:176. doi: 10.3389/fnins.2018.00176. eCollection 2018.
Transcranial electric stimulation such as transcranial random noise stimulation (tRNS) and transcranial direct current stimulation (tDCS) have been used to investigate structure-function relationships in numerical cognition. Recently, tRNS was suggested to be more effective than tDCS. However, so far there is no evidence on the differential impact of tDCS and tRNS on numerical cognition using the same experimental paradigm. In the present study, we used a two-digit addition paradigm for which significant-albeit small-effects of tDCS were observed previously to evaluate the impact of parietal and frontal tRNS on specific numerical effects. While previous studies reported a modulation of numerical effects of this task through tDCS applied to parietal areas, we did not observe any effect of parietal tRNS on performance in two-digit addition. These findings suggest that tRNS seemed to influence concurrent mental arithmetic less than tDCS at least when applied over the IPS. These generally small to absent effects of tES on actual arithmetic performance in the current addition paradigm are in line with the results of a recent meta-analysis indicating that influences of tES may be more pronounced in training paradigms.
经颅电刺激，如经颅随机噪声刺激（tRNS）和经颅直流电刺激（tDCS），已被用于研究数字认知中的结构-功能关系。最近，有人提出tRNS比tDCS更有效。然而，到目前为止，尚无证据表明在使用相同实验范式的情况下，tDCS和tRNS对数字认知有不同影响。在本研究中，我们使用了一个两位数加法范式，此前曾观察到tDCS有显著（尽管较小）的效果，以评估顶叶和额叶tRNS对特定数字效应的影响。虽然先前的研究报告称，通过将tDCS应用于顶叶区域可调节该任务的数字效应，但我们并未观察到顶叶tRNS对两位数加法表现有任何影响。这些发现表明，至少在应用于顶内沟时，tRNS对同时进行的心算的影响似乎小于tDCS。在当前加法范式中，tES对实际算术表现通常较小或无影响，这与最近一项荟萃分析的结果一致，该分析表明tES的影响在训练范式中可能更明显。
