ERP Investigations of Novelty Processing in Aging and AD

描述：(申请人提供)对新奇事件的关注有助于 适应不断变化的环境，并可能增加与一个人的接触？S 改善环境，增强认知能力。尽管它很重要，但有 对年龄和疾病相关的大脑变化的研究有限 处理新奇事件。在皮？S研究的基础上，提出了一个初步的模型。 提出了一种基于神经元的查新处理系统。在这项工作的基础上， 这项拟议的研究将调查新奇P3的年龄相关变化 对新刺激的反应和随后的注意力分配(按测量 通过查看持续时间)，以便阐明 对新奇事物和不同认知老化模式的反应。这个 研究旨在区分因出现的新奇事物而发生的变化 是不可避免的(即使是最成功的认知老化也是如此)， 通常认知老化最常见的变化，以及变化 与最常见的大脑退行性疾病有关 (阿尔茨海默病？S病)。 精心设计的一系列实验将检验以下假设：1) 高认知人群对新奇事物反应的年龄相关变化 表演个人；2)对新颖性的反应差异 认知水平较高和表现中等的老年人；3)与年龄相关的变化 响应于不同级别的个体之间的新颖性 认知表现；4)对新奇事物的反应不同 认知正常的人和认知受损的人(轻度 阿尔茨海默病？S病)；以及5)新奇P3反应与 以及随后对实验室中的新事件和水平的关注 参与日常活动。这些整合的功能和认知 神经科学研究将扩展先前在注意力神经学方面的工作 新的事件，并提供新的洞察力 人类行为的基本方面与正常衰老和疾病有关。

DESCRIPTION: (provided by applicant) Attention to novel events facilitates adaptation to a changing environment and may increase engagement with one?s surroundings and enhance cognitive abilities. Despite its importance, there has been limited study of age- and disease-related changes in how the brain processes novel events. Based on the PI?s research, a provisional model of a neurally-based novelty processing system is presented. Building upon this work, the proposed research will investigate age-related changes in the novelty P3 response and subsequent allocation of attention to novel stimuli (as measured by viewing durations) in order to elucidate the relationship between responsiveness to novelty and different patterns of cognitive aging. The research aims to distinguish between changes in response to novelty that appear to be inevitable (observed with even the most successful cognitive aging), changes that are most commonly seen with usual cognitive aging, and changes that are associated with the most frequent degenerative disease of the brain (Alzheimer?s disease). A carefully designed series of experiments will test hypotheses about: 1) age-related changes in response to novelty among groups of cognitively high performing individuals; 2) differences in response to novelty between cognitively high and mid performing older individuals; 3) age-related changes in response to novelty among groups of individuals that differ in level of cognitive performance; 4) differences in response to novelty between cognitively normal individuals and cognitively impaired ones (with mild Alzheimer?s disease); and 5) the relationship between the novelty P3 response and subsequent attention to novel events in the laboratory and level of engagement in daily activities. These integrative functional and cognitive neuroscientific studies will extend previous work on the neurology of attention to novel events and provide new insights into the ways in which this fundamental aspect of human behavior is related to normal aging and disease.