STATE-DEPENDENT CONTROL OF SOMATIC REFLEX ACTIVITY

本申请中描述的研究旨在检查 神经递质和神经回路 负责三叉神经的状态依赖性调节 睡眠时运动神经元膜电位活动， 清醒 跨学科电生理学和 提出了离子电渗研究，每一项研究都涉及和 补充了其他人。 这些研究， 在对悖论的研究框架内， “网状反应逆转”现象，需要一个 确定的状态依赖活动的 脑桥口侧核、 延髓网状核和三叉神经 运动核 拟议的研究将（1）提供全面的描述 的发生频率和定量分析， 新发现的抑制和 兴奋性突触后电位参与了 脑干运动神经元膜电位调制 在睡眠和清醒期间的活动，（2）产生规范的 与抑制性和兴奋性有关的信息基金 介导突触后抑制的神经递质， 在这些状态下脑干运动神经元的兴奋，以及（3） 建立了一个典型的实验范式， 触发平均、细胞内记录和离子电渗 技术来研究慢性， 未麻醉正常呼吸的动物

The research described in this application is designed to examine the neurotransmitters and neuronal circuitry which are responsible for the state-dependent modulation of trigeminal motoneuron membrane potential activity during sleep and wakefulness. Interdisciplinary electrophysiological and iontophoretic studies are proposed, each of which relates to and complements the others. These studies, which are organized within the framework of the examination of the paradoxical phenomenon of "reticular response-reversal", entail a determination of the state-dependent activity of the interrelationships between the pontine nucleus pontis oralis, the medullary nucleus reticularis gigantocellularis and the trigeminal motor nucleus. The proposed studies will (1) provide a comprehensive description of the frequency of occurrence and a quantitative analysis of the waveform characteristics of the newly-discovered inhibitory and excitatory postsynaptic potentials that are involved in the modulation of brain stem motoneuron membrane potential activity during sleep and wakefulness, (2) generate a normative fund of information relating to the inhibitory and excitatory neurotransmitters which mediate the postsynaptic inhibition and excitation of brain stem motoneurons during these states, and (3) establish a prototypical experimental paradigm for utilizing spike- triggered averaging, intracellular recording and iontophoretic techniques to study the cellular bases of behavior in the chronic, unanesthetized, normally respiring animal.