AUTONOMIC CONTRIBUTION TO ENERGY METABOLISM IN HUMANS

说明(改编自应用程序) 能量代谢在控制体重和总体上发挥着重要作用 营养。能量消耗(EE)的变化会改变能量平衡。 自主神经系统(ANS)的活动影响日常EE。上一首 研究发现，静息EE与ANS的某些指标之间存在关联 在某些人群中的活动。然而，ANS的数量作用 调节EE其他成分的活性尚不清楚。尤其是， 应研究ANS对体力活动和相关EE的调节 因为这个分量对日EE的贡献最大。一些人 能量代谢改变的消化系统疾病，如肝硬变，也有 改变ANS活性，但调节机制之间的关系是 未知。 技术和生物医学工程的进步可以促进准确的 测量ANS活动、能量代谢和体力活动。我们会 利用全室间接量热室的独特组合 警队站台地板，以及电子活动传感系统，以量化 24小时内的EE和体力活动量；多个便携 运动探测器和一种新型的测力鞋垫装置，我们 开发用于准确确定类型、强度、持续时间和频率 在7天的自由生活中的身体活动。我们将获得一个 全面的ANS活动谱包括多个指标，如血浆 儿茶酚胺、尿儿茶酚胺排泄量、显微神经学检查和 心率变异性。使用这些准确的测量，我们希望建立 EE和ANS活性之间的定量关联。 我们将在四个月中探索ANS在EE和体力活动中的作用 具有不同ANS活动水平的成人受试者分组：1)a 不同的健康正常人，年龄、性别、体重和种族不同， 2)ANS活性非常低的纯自主神经衰竭患者，3) ANS活性非常高的直立不耐受患者，以及4) 有不同程度ANS改变的肝硬变患者。结果： 这项研究应该有助于加深对ANS控制能量的理解。 正常和疾病状态下的新陈代谢。从这个项目中获得的经验 而说教训练也将帮助我发展成为一个独立的 生物医学研究方面的研究员。

DESCRIPTION (adapted from the application) Energy metabolism plays an important role in body weight control and overall nutrition. Changes in energy expenditure (EE) can alter energy balance. Activity of the autonomic nervous system (ANS) influences daily EE. Previous studies have found associations between resting EE and some measures of ANS activities in certain populations. However, the quantitative roles of ANS activity in regulating other components of EE are unclear. In particular, the ANS regulation of physical activity and associated EE should be investigated since this component contributes the largest variation to daily EE. Some digestive diseases with altered energy metabolism, such as Cirrhosis, also have altered ANS activity, but the relationship between the regulatory mechanisms is unknown. Advances in technology and biomedical engineering can facilitate the accurate measurements of ANS activity, energy metabolism, and physical activity. We will utilize an unique combination of a whole-room indirect calorimetry chamber, a force platform floor, and a electronic activity sensing system to quantify the amount of EE and physical activity in a 24-hour period; multiple portable movement detectors and a novel force measurement insole device that we developed to accurately determine the type, intensity, duration, and frequency of the physical activities in 7 days of free living. We will obtain a comprehensive ANS activity profile includes multiple indices such as plasma catecholamines, urinary excretion of catecholamines, microneurography, and heart rate variability. Using these accurate measurements, we hope to establish quantitative associations between EE and ANS activity. We will explore the role of ANS plays in EE and physical activity in four groups of adult human subjects with various ANS activity levels: 1) a heterogeneous healthy normals, varying in age, gender, weight, and ethnicity, 2) patients with Pure Autonomic Failure who have very low ANS activities, 3) patients with Orthostatic Intolerance who have very high ANS activities, and 4) patients with cirrhosis who have various levels of ANS alterations. Results of this study should lead to improved understanding of ANS in controlling energy metabolism in normal and disease states. Experiences gained from this project and the didactic training will also help me to develop into an independent investigator in biomedical research.