FUNCTIONAL NEUROANATOMY OF FEAR CONDITIONING

这个项目的长期目标是提高我们对 人类大脑中的神经系统是如何帮助 通过评估大脑代谢活动， 健康志愿者的功能磁共振成像 （fMRI）。 具体而言，该项目将侧重于收购和 巴甫洛夫恐惧条件反射的动态评估 在学习过程中区域激活的变化， 恐惧反应被表达出来。 这些目标将通过两个 实验 在第一个实验中，志愿者将接受初步培训 （获得）害怕中性刺激。 然后他们的记忆 将评估以前的培训（绩效）。 功能和 将在采集期间获得解剖图像， 性能阶段。 在第二个实验中，志愿者将 差异训练害怕一个刺激（Csplus），而不是害怕一个刺激。 第二刺激（CS-）。 在这个实验中，受试者将作为他们的 自己的控制，探针试验将用于进行比较 没有UCS演示。 这些实验将回答 哪些神经结构参与了学习和表达 条件性恐惧，将描述激活的时间模式， 在这些结构中，将提供有关参与如何 当学习发生和恐惧被表达时， 并将与学习动物模型系统进行比较。这些数据 收集将大大促进我们对 人类恐惧和焦虑的神经解剖学机制， 直接有助于改善评估和治疗 情感障碍

The long term goal of this project is to improve our understanding of how neural systems in the human brain subserve aversive emotional states like fear and anxiety by assessing the brain metabolic activity of healthy volunteers with Functional Magnetic Resonance Imaging (fMRI). Specifically, this project will focus on the acquisition and performance of Pavlovian fear conditioning by assessing dynamic changes in regional activation during the learning process and when a fear response is expressed. These goals will be achieved with two experiments. In the first experiment, volunteers will be initially trained (acquisition) to fear a neutral stimulus. Then their memory for the previous training (performance) will be assessed. Functional and anatomical images will be obtained during both acquisition and performance phase. In the second experiment, volunteers will be differentially trained to fear one stimulus (Csplus) and not to fear a second stimulus (CS-). In this experiment, subjects will serve as their own control, and Probe trials will be used to make comparisons without UCS presentation. These experiments will answer questions about which neural structures are involved in learning and expression of conditional fear, will describe the temporal pattern of activation within these structures, will provide insights into how the involvement of various structures change as learning occurs and fear is expressed, and will comparisons with learning animal model systems. The data to be collected will substantially advance our understanding of neuroanatomical mechanisms of human fear and anxiety, and may directly contribute to improvements in the assessment and treatment of affective disorders.