Anodal Transcranial Direct Current Stimulation-Induced Effects Over the Right Dorsolateral Prefrontal Cortex: Differences in the Task Types of Task Switching

被引:5
|
作者
Wang, Ziyu [1 ]
Zhu, Rongjuan [1 ]
You, Xuqun [1 ]
机构
[1] Shaanxi Normal Univ, Sch Psychol, Key Lab Behav & Cognit Neurosci Shaanxi Prov, Xian, Peoples R China
来源
FRONTIERS IN PSYCHOLOGY | 2021年 / 12卷
关键词
dorsolateral prefrontal cortex (DLPFC); transcranial direct current stimulation (tDCS); task switching; tDCS-induced effect; task-specific effect;
D O I
10.3389/fpsyg.2021.630239
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Transcranial direct current stimulation (tDCS) has been previously used to investigate the causal relationships between the dorsolateral prefrontal cortex (DLPFC) and task switching but has delivered inconclusive results that may be due to different switching tasks involving different cognitive control processes. In the current study, we manipulated task types and task predictability to investigate the role of DLPFC in task-switching performances. Notably, we distinguished the specific effects of anodal-tDCS on two types of tasks (parity/magnitude and parity/vowel-consonant tasks). Forty-eight participants were randomly assigned to four task groups as follows; Group I who was assigned right anode (RA) parity/magnitude tasks, Group II who were assigned sham parity/magnitude tasks, Group III who were assigned RA parity/vowel-consonant tasks, and Group IV who were assigned sham parity/vowel-consonant tasks. Participants were asked to complete both predictable and unpredictable tasks. In the parity/magnitude task, we demonstrated a lower switch cost for the RA group compared to the sham group for unpredictable tasks. In contrast, in the parity/vowel-consonant task, the switch cost was higher for the RA group compared to the sham group for unpredictable and predictable tasks. These findings confirmed an anodal-tDCS-induced effect over the right DLPFC both in the parity/magnitude and parity/vowel-consonant tasks. Our data indicated that anodal tDCS may have a stronger influence on task-switching performance over the right DLPFC by changing the irrelevant task-set inhibition process. Also, the right DLPFC is unlikely to act by performing exogenous adjustment of predictable task switching.
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页数:12
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