CENTRAL NERVOUS SYSTEM MEDIATION OF AFFECTIVE AUTONOMIC/BEHAVIORAL RESPONSES

这些实验的总体目标是推进我们对 的神经生理机制，基础的反应， 交感神经系统对动物模型中情绪应激的影响。 项目4着重于两个集成的自主/行为反应， 交感神经系统占主导地位的情绪应激源; 防御反应和警惕反应：该项目旨在 描绘介导心血管系统的功能性传出通路 防御和警惕反应的组成部分，并确定如何 关键的中枢神经系统位点相互作用，产生这些整合的模式， 对压力的反应。 虽然心血管反应性的减弱 是许多临床干预的目标，涉及的CNS机制 情感反应系统的增益调制很差， 明白 因此，本提案的目标之一是 评估化学感受器的感觉信息 和压力感受器调节心血管反应性与 防御反应和警戒反应。 通过使用 电生理学、神经解剖学和行为学技术， 将实现以下具体目标：1）继续 在上一个供资期间启动的调查将使用 逆行分析以追踪介导血管紧张素转换酶的传出通路 防御反应和警戒反应。 2)使用利多卡因 可逆损伤技术和单细胞记录技术， 确定位于杏仁核内的整合位点的功能， 下丘脑和中脑导水管周围灰质（PAG）的组织， 调节防御反应; 3）使用利多卡因病灶和单 细胞记录技术，以评估反馈调节机制， 心血管反应性通过来自压力感受器的信息， 化学感受性传入; 4）使用逆行分析来绘制通路 从压力感受器到中枢神经系统的部位， 防御反应

The overall objective of these experiments is to advance our understanding of the neurophysiological mechanisms that underlie responses of the sympathetic nervous system to emotional stressors in an animal model. Project 4 focuses upon two integrated autonomic/behavioral responses to emotional stressors in which the sympathetic nervous system predominates; the defense reaction and the vigilance reaction: This project seeks to delineate the functional efferent pathways that mediate the cardiovascular components of the defense and vigilance reactions and to determine how critical CNS sites interact to produce these integrated patterns of response to stressors. Although attenuation of cardiovascular reactivity is a goal of many clinical interventions, the CNS mechanisms involved in the modulation of the gain of affective response systems are poorly understood. Accordingly, one of the objectives of the current proposal is to assess the mechanisms by which sensory information from chemoreceptor and baroreceptors modulate cardiovascular reactivity associated with the defense reaction and the vigilance reaction. By using electrophysiological, neuroanatomical, and behavioral techniques the following specific aims will be addressed; 1) to continue the line of inquiry initiated during the previous funding period which will use a retrograde analysis to trace the efferent pathways that mediate athe defense reaction and the vigilance reaction. 2) to use the lidocaine reversible lesioning technique and single cell recording techniques to determine the function of integrative sites located ina the amygdala, hypothalamus and periaqueductal grey (PAG) ina the organization and regulation the defense reaction; 3) to use lidocaine lesions and single cells recording techniques to asses mechanisms of feedback regulation of cardiovascular reactivity by information from baroreceptor and chemoreceptive afferents; 4) to use a retrograde analysis to map pathways from baroreceptors to CNS sites that mediate feedback regulation of the defense reaction.