Modulating presence and impulsiveness by external stimulation of the brain
Modulating presence and impulsiveness by external stimulation of the brain
复制标题
DOI：
10.1186/1744-9081-4-33
复制
发表时间：
2008-08-04
影响因子：
5.1
通讯作者：
Jaencke, Lutz
中科院分区：
文献类型：
--
作者：
Beeli, Gian;Casutt, Gianclaudio;Jaencke, Lutz
背景资料：“在那里的感觉”是描述虚拟环境中存在的感觉现象并表现得好像这个环境是真实的的一种可能的方式。一个大脑区域，这是假设是至关重要的参与调制这种感觉（也称为存在）是背外侧前额叶皮层（dIPFC），一个区域也与控制的冲动behavior.Methods：在我们的实验中，我们应用经颅直流电刺激（tDCS）的权利dIPFC，以调制的经验，同时观看虚拟过山车。在骑行过程中，我们还记录了皮肤电活动。受试者还进行了测试测量冲动，并回答了问卷调查，他们的存在感，而他们被暴露在虚拟的过山车scenario.Results：应用阴极tDCS的权利dIPFC，而受试者被暴露在一个虚拟的过山车的情况下调制的皮肤电反应的虚拟现实刺激。此外，反映冲动的措施也调制通过应用阴极tDCS的权利dIPFC.Conclusion：调制激活与权利dIPFC的结果在植物神经系统的反应和改变冲动的实质性变化。这些效应可以用讨论右dIPFC对“脉冲系统”自上而下影响的理论来解释。
Background: "The feeling of being there" is one possible way to describe the phenomenon of feeling present in a virtual environment and to act as if this environment is real. One brain area, which is hypothesized to be critically involved in modulating this feeling (also called presence) is the dorso-lateral prefrontal cortex (dIPFC), an area also associated with the control of impulsive behavior.Methods: In our experiment we applied transcranial direct current stimulation (tDCS) to the right dIPFC in order to modulate the experience of presence while watching a virtual roller coaster ride. During the ride we also registered electro-dermal activity. Subjects also performed a test measuring impulsiveness and answered a questionnaire about their presence feeling while they were exposed to the virtual roller coaster scenario.Results: Application of cathodal tDCS to the right dIPFC while subjects were exposed to a virtual roller coaster scenario modulates the electrodermal response to the virtual reality stimulus. In addition, measures reflecting impulsiveness were also modulated by application of cathodal tDCS to the right dIPFC.Conclusion: Modulating the activation with the right dIPFC results in substantial changes in responses of the vegetative nervous system and changed impulsiveness. The effects can be explained by theories discussing the top-down influence of the right dIPFC on the "impulsive system".