Preliminary Evidence of "Other-Race Effect"-Like Behavior Induced by Cathodal-tDCS over the Right Occipital Cortex, in the Absence of Overall Effects on Face/Object Processing.
Preliminary Evidence of "Other-Race Effect"-Like Behavior Induced by Cathodal-tDCS over the Right Occipital Cortex, in the Absence of Overall Effects on Face/Object Processing.
复制标题
DOI：
10.3389/fnins.2017.00661
复制
发表时间：
2017
影响因子：
4.3
通讯作者：
Rivolta D
中科院分区：
文献类型：
--
作者：
Costantino AI;Titoni M;Bossi F;Premoli I;Nitsche MA;Rivolta D
经颅直流电刺激 (tDCS) 等神经调节技术为介导认知的神经生理学机制提供了重要的见解。尽管阳极 tDCS (a-tDCS) 通常可以增强认知技能，但阴极 tDCS (c-tDCS) 在视觉认知中的作用很大程度上尚未被探索且尚无定论。在此，在一项单盲、假对照研究中，我们研究了 1.5 mA c-tDCS 对 86 名参与者的右枕叶皮层在评估面部和物体的感知和记忆的四项任务中的离线影响。结果表明，c-tDCS 总体上不会影响四项任务的表现。然而，对参与者种族（白人与非白人）的事后探索性分析显示，仅非白人参与者的“特定面部”表现下降（约 10%）。这一初步证据表明，c-tDCS 可以在非白人参与者中诱导“其他种族效应 (ORE) 样”行为，这些参与者在刺激前（以及假刺激的情况下）没有表现出任何 ORE。我们的结果增加了关于可通过 c-tDCS 调节的认知过程和视觉刺激的广度、有效神经调节方案设计的相关信息，并对 ORE 的潜在神经生理学基础具有重要意义。
Neuromodulation techniques such as tDCS have provided important insight into the neurophysiological mechanisms that mediate cognition. Albeit anodal tDCS (a-tDCS) often enhances cognitive skills, the role of cathodal tDCS (c-tDCS) in visual cognition is largely unexplored and inconclusive. Here, in a single-blind, sham-controlled study, we investigated the offline effects of 1.5 mA c-tDCS over the right occipital cortex of 86 participants on four tasks assessing perception and memory of both faces and objects. Results demonstrated that c-tDCS does not overall affect performance on the four tasks. However, post-hoc exploratory analysis on participants' race (Caucasian vs. non-Caucasians), showed a “face-specific” performance decrease (≈10%) in non-Caucasian participants only. This preliminary evidence suggests that c-tDCS can induce “other-race effect (ORE)-like” behavior in non-Caucasian participants that did not show any ORE before stimulation (and in case of sham stimulation). Our results add relevant information about the breadth of cognitive processes and visual stimuli that can be modulated by c-tDCS, about the design of effective neuromodulation protocols, and have important implications for the potential neurophysiological bases of ORE.
登录
查看更多内容
影响因子：
2.9
作者：
Grützner C;Wibral M;Sun L;Rivolta D;Singer W;Maurer K;Uhlhaas PJ
通讯作者：
Uhlhaas PJ
影响因子：
2.6
作者：
Kuo, Min-Fang;Unger, Mandy;Nitsche, Michael A.
通讯作者：
Nitsche, Michael A.
影响因子：
1.7
作者：
Antal, A;Varga, ET;Paulus, W
通讯作者：
Paulus, W
影响因子：
3.4
作者：
McKone, Elinor;Hall, Ashleigh;O'Connor, Kirsty B.
通讯作者：
O'Connor, Kirsty B.
影响因子：
2.7
作者：
CHANCE, JE;TURNER, AL;GOLDSTEIN, AG
通讯作者：
GOLDSTEIN, AG