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The development of an fMRI protocol to investigate vmPFC network functioning underlying the generalization of behavioral control

机译:开发FMRI协议,以调查行为控制概括的VMPFC网络

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Experiencing behavioral control over stress can have long-lasting and generalizing effects. Animal research has shown that vmPFC-subcortical interactions are critical for behavioral control; however, research in humans is sparse. Therefore a paradigm was developed in which participants (n = 18) were first assigned to a controllable or uncontrollable version of a signal detection task associated with mild shocks. Subsequently, subjects underwent an fMRI task on the anticipation of speaking in public while measuring self-reported stress, heart rate, and vmPFC network topology. The signal detection task results revealed faster responses to potential shock trials and a trend difference between the controllable and uncontrollable group. The speech anticipation procedure did not show significant between-group differences on self-reported stress or heart rate. fMRI results indicated higher vmPFC efficiency in the controllable threat group at baseline and recovery but similar to the uncontrollable group during speech anticipation. The current report establishes the feasibility of the protocol. However, to evaluate the generalization effect of controllability on the behavioral, physiological, and neural levels further, adequately-powered follow-up research is needed.
机译:体验对压力的行为控制可以产生长期和普遍的影响。动物研究表明,vmPFC皮层下相互作用对行为控制至关重要;然而,对人类的研究很少。因此开发了一个范例,参与者(n=18)首先被分配到与轻度电击相关的信号检测任务的可控或不可控版本。随后,受试者在测量自我报告的压力、心率和vmPFC网络拓扑结构的同时,接受了一项功能磁共振成像任务,以预测在公共场合讲话。信号检测任务的结果显示,对潜在电击试验的反应更快,可控组和不可控组之间存在趋势差异。言语预测程序在自我报告的压力或心率方面没有显示出组间差异。功能磁共振成像结果显示,在基线检查和恢复时,可控威胁组的vmPFC效率较高,但在言语预测时,与不可控威胁组相似。目前的报告确定了该议定书的可行性。然而,为了进一步评估可控性对行为、生理和神经水平的泛化效应,需要进行充分的后续研究。

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