NETWORK, CELLULAR AND MOLECULAR DETERMINANTS OF BEHAVIOR

行为的网络、细胞和分子决定因素

• 批准号: 6139332
• 负责人: KLAUDIUSZ ROBERT WEISS
• 金额: $ 10.57万
• 依托单位: ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
• 依托单位国家: 美国
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6139332
• 关键词: Aplysia; alternatives to animals in research; behavioral /social science research tag; eating; electrophysiology; immunocytochemistry; motor neurons; muscle; muscle contraction; neural information processing; neural plasticity; neural transmission; neuroanatomy; neuropeptides; neurotransmitters; oral behavior; swallowing

The long term goal of our research is to understand the neural basis of plasticity of complex motivated behaviors. Towards this goal, we propose to investigate the circuits and neural mechanisms that are responsible for the generation of feeding behavior in a simple model system, Aplysia californica. This research will utilize an integrated interdisciplinary approach that combines anatomical, immunocytochemical, electrophysiological, and biochemical techniques with a behavioral analysis. The major question we will investigate concerns the ability of an organism to utilize the same neuronal elements and the same muscles in executing a variety of coordinated behaviors each of which can vary in their intensity and speed. We propose that this may be achieved by two major groups of mechanisms. The first, consists of creating different functional motor circuits, through activation of different combinations of motorneurons for different behaviors, and of changes of firing patterns of motorneurons in those cases when within a single behavior either the intensity or the frequency of responding change. The second postulated group of mechanisms operate by changing the proportions and combination of modulatory cotransmitters (especially neuropeptides) and classical transmitters acting on the muscle, thus adjusting the properties of the muscle to meet specific behavioral demands. A conceptual model that incorporates both groups of mechanisms will be tested, and if correct, will help guide future studies of the role that circuit selection and neuromodulation play in motivated behaviors. These studies should facilitate understanding of the neural basis of motivated behaviors and of their dysfunction, as seen in prevalent material illnesses such as depression and mania.

我们研究的长期目标是了解神经网络 的基础 复杂动机行为的可塑性。 为了这个目标，我们 提出 研究电路和神经机制 负责任的 用于在简单的模型系统中生成进食行为， 海兔 加利福尼亚州。 这项研究将利用综合 跨学科的 结合了解剖学、免疫细胞化学、 具有行为学特征的电生理学和生化技术 分析。 我们要调查的主要问题涉及 的能力 利用相同的神经元元素和相同的生物体 肌肉在 执行各种协调的行为，每个行为都可能有所不同 在 他们的强度和速度。 我们建议这可以通过以下方式实现 二 主要机制组。 第一，包括创建 不同的 功能性运动电路，通过激活不同的 组合 运动神经元的不同行为以及放电的变化 在这些情况下，运动神经元的模式在单个 行为 反应的强度或频率发生变化。 这 第二 假设的一组机制通过改变比例来运作 和 调节性共递质（尤其是神经肽）的组合 和 作用于肌肉的经典发射器，从而调整 肌肉的特性以满足特定的行为需求。 一个 包含两组机制的概念模型将 是 经过测试，如果正确，将有助于指导该角色的未来研究 那 电路选择和神经调节在动机行为中发挥作用。 这些 研究应有助于理解神经基础 有动力 行为及其功能障碍，如流行材料中所示 抑郁症和躁狂症等疾病。