Memory fragmentation during threat-driven naturalistic events

项目总结/摘要 威胁作为一种行为和神经结构会影响记忆质量。动物模型显示， MTL功能障碍，与人类神经影像学文献中的同源物。具体来说，高唤醒偏见 以海马体中的上下文绑定为损害的基于项目的处理的记忆编码， 导致内存碎片。使用自然主义刺激的研究（即，影片剪辑）允许逼真的 描绘，以诱导威胁驱动的情景记忆和随后的影响，准确的唤醒诱导 功能障碍;然而，MTL的功能参与的作用尚未完全确定， 唤醒驱动事件的编码和检索。这项研究将利用生态有效的实验 在使用自然事件记忆的编码和检索期间基于任务的成像技术的设计 和不受约束的自由回忆，以更好地模拟现实世界的背景。该提案将提供神经生物学 基金会，以确定偏见的记忆，由于威胁相关的觉醒。此外，该项目和研究金将 让我获得关键的培训机会，特别是在神经影像分析，统计建模， 理论上理解综合记忆和神经调节的认知神经科学;所有 如果没有这笔资金，我是没有时间接受的。我和我的导师，共同导师 设计了一个培训计划，使我能够将动物模型转化为人类神经成像研究， 获得应用这些方法的技能，以提供框架来了解与威胁相关的唤醒偏见 记忆内聚此外，通过这些经验，我将掌握表征所需的分析技术 基于任务的成像研究设计的神经行为相关性。这些努力将确保我获得 专业，分析和理论技能，我未来的职业生涯所必需的独立调查员， 唤醒相关记忆领域。这个奖学金的支持将使我能够完成我的学业 并发展成为一个富有成效和有影响力的研究人员，确定与威胁相关的神经机制 唤醒对自然记忆形成和记忆碎片的影响，我希望将其应用于模型 创伤后应激障碍

PROJECT SUMMARY/ABSTRACT Threat as a behavioral and neural construct impacts memory quality. Animal models show arousal-related dysfunction of the MTL, with homologs in the human neuroimaging literature. Specifically, high arousal biases memory encoding towards item-based processing at the detriment of contextual binding in the hippocampus, leading towards memory fragmentation. Research using naturalistic stimuli (i.e., movie clips) allows realistic portrayal to induce threat-driven episodic memory and subsequent impact of accurate arousal-induced dysfunction; however, the role of functional engagement of the MTL have not been wholly identified during the encoding and retrieval of arousal-driven events. The proposed study will utilize ecologically valid experimental designs of tasked-based imaging techniques during encoding and retrieval using naturalistic event memoranda and unconstrained free recall, to better model real-world contexts. This proposal will provide a neurobiological foundation to identify biases in memory due to threat-related arousal. Further, this project and fellowship would allow me to obtain key training opportunities, particularly in neuroimaging analysis, statistical modeling, and theoretical understanding of synthesizing the cognitive neuroscience of memory and neuromodulation; all of which I would not otherwise have the time to receive without this funding. My mentor, co-mentor and I have designed a training plan that will allow me to translate animal models into human neuroimaging research, and gain skills to apply these methods to provide frameworks to understand how threat-related arousal biases memory cohesion. Further, through these experiences I will master analysis techniques needed to characterize neurobehavioral correlates of task-based imaging study designs. These efforts will ensure I gain the professional, analytical, and theoretical skills necessary for my future career as an independent investigator in the domain of arousal-related memory. The support of this fellowship will allow me to round out my education and develop into a productive and impactful researcher, identifying neural mechanisms for threat-related arousal impacts on natural memory formation and memory fragmentation, which I will hope to apply to models of PTSD in the future.