Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： Acute stress is a series of physiological and psychological reaction that could help people adjust homeostasis, when their body facing changes and challenges in the external environment. Acute stress has a profound impact on cognitive processing, especially the core function working memory. However, inconsistent behavioral influence by acute stress exists in a plethora of previous studies. We therefore review the empirical results, and systematically summarize the findings. From three perspectives, methods to induce stress, working memory tasks/sub-components, and subjects’ individual differences, we can better explain the physiological and psychological mechanisms underlying the influence of acute stress on working memory. We proposed that the influence could be better understood from views of cognitive neural mechanisms. Future studies should jointly consider these extensive factors of stress and translate findings from basic research into intervention and regulation of negative effects of acute stress.
Subjects: Psychology >> Cognitive Psychology submitted time 2018-03-22 Cooperative journals: 《心理学报》
Abstract： The right dorsolateral prefrontal cortex (DLPFC) plays an important role in working memory. Previous neuroimaging and neurophysiological studies have found sustained and elevated DLPFC activity during working memory delay period. Meanwhile, the right DLPFC has been suggested to be more dominant in visuospatial than verbal working memory. While the causal evidence for the relationship between the right DLPFC and visual working memory is still rare.Transcranial direct current stimulation (tDCS) and EEG were combined to investigate the causal relationship between the right DLPFC and processes of visual working memory. Forty participants performed a color change detection task with memory load of 4 items (load-4) or 6 items (load-6) while their electroencephalography (EEG) was recorded. Before they performed the tasks, either 15 min of 1.5 mA transcranial direct current stimulation (tDCS) or 30 s of 1.5 mA sham stimulation (SHAM) was applied over the right DLPFC. The participants were divided into two groups according to their working memory capacity increment from load-4 to load-6 in the sham condition, the group who gained more increment (the high potential group) under the sham condition also benefit more from the anodal tDCS over the right DLPFC, while the other group (the low potential group) did not show such effects.
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