经颅直流电刺激默认模式网络顶叶节点可减少对过去的消极走神。
Transcranial direct current stimulation of default mode network parietal nodes decreases negative mind-wandering about the past.
作者信息
Chou Tina, Hooley Jill M, Camprodon Joan A
机构信息
Department of Psychiatry, Massachusetts General Hospital/Harvard Medical School, Charlestown, MA.
Department of Psychology, Harvard University, Cambridge, MA.
出版信息
Cognit Ther Res. 2020 Feb;44(1):10-20. doi: 10.1007/s10608-019-10044-9. Epub 2019 Sep 28.
Abstract
Mind-wandering is a cognitive process in which people spontaneously have thoughts that are unrelated to their current activities. The types of mind-wandering thoughts that people have when affected by a negative mood resemble thoughts associated with mood disorders (e.g., negative thoughts about the past). Transcranial direct current stimulation (tDCS) is a form of noninvasive brain stimulation that can modulate cognition and affect in healthy and clinical populations. Ninety participants received either excitatory, inhibitory, or sham tDCS to bilateral inferior parietal lobe (IPL) nodes of the default mode network (DMN) to assess changes in maladaptive mind-wandering following criticism. tDCS did not change mind-wandering frequency after hearing criticism, but it did change what people mind-wandered about. Specifically, cathodal stimulation decreased the frequency of negative mind-wandering thoughts about the past. Future studies could investigate tDCS of DMN regions as an intervention for patients with mood disorders who suffer from negative, past-oriented cognitions.
摘要
走神是一种认知过程，在此过程中人们会自发地产生与当前活动无关的想法。当受到负面情绪影响时，人们走神时的想法类型类似于与情绪障碍相关的想法（例如，对过去的消极想法）。经颅直流电刺激（tDCS）是一种非侵入性脑刺激形式，可调节健康人群和临床人群的认知与情感。90名参与者接受了对默认模式网络（DMN）双侧顶下小叶（IPL）节点的兴奋性、抑制性或伪tDCS，以评估受到批评后适应不良走神的变化。听到批评后，tDCS并未改变走神频率，但确实改变了人们走神的内容。具体而言，阴极刺激降低了对过去的消极走神想法的频率。未来的研究可以将DMN区域的tDCS作为对患有消极的、以过去为导向认知的情绪障碍患者的一种干预措施进行研究。
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