Neural Connectivity and the Transition to Alcohol Dependence

神经连接和酒精依赖的转变

基本信息

批准号：
8733486
负责人：
JOSEPH P. SCHACHT
金额：
$ 9.61万
依托单位：
MEDICAL UNIVERSITY OF SOUTH CAROLINA
依托单位国家：
美国
项目类别：
财政年份：
2013
资助国家：
美国
起止时间：
2013-09-15 至 2015-08-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8733486
关键词：
Affect Alcohol consumption Alcohol dependence Alcoholic beverage heavy drinker Alcoholism American Amygdaloid structure Animal Model Anterior Area Behavior Control Brain Brain Part Brain region Corpus striatum structure Cues Decision Making Dependence Development Disease Dorsal Functional Magnetic Resonance Imaging Functional disorder Future Goals Habits Heavy Drinking Human Image Impairment Individual Individual Differences Knowledge Measures Mediating Mentors Mentorship Motivation Neurobiology Neurocognitive Neurocognitive Deficit Obsessive compulsive behavior Participant Pattern Performance Phase Preventive Intervention Process Proxy Psychopathology Recurrent disease Relapse Research Personnel Rest Rewards Severities Stimulus System Task Performances Testing Therapeutic Intervention Training Work addiction alcohol cue alcohol exposure alcoholism therapy cue reactivity drinking drinking behavior drinking onset executive function habit learning motivated behavior neuroimaging problem drinker public health relevance relating to nervous system reward processing tool young adult

项目摘要

DESCRIPTION (provided by applicant): The advent of functional magnetic resonance imaging (fMRI) has profoundly advanced understanding of the human brain. One of the most exciting cutting-edge applications of fMRI is connectivity analysis, which reveals not only the separate brain regions involved in a given neural process, but also the manner in which these regions interact with each other. Dysfunction in such interactions is arguably the crux of human psychopathology. Connectivity analysis may particularly advance understanding of the neurobiology of alcohol dependence (alcoholism), a progressive, chronically relapsing disease that affects eight million Americans annually. The disease often begins with reward-driven heavy drinking and ultimately develops into a pattern of habitual, compulsive use. Animal models of addiction suggest that one key factor in this transition is a pervasive shift in the connectivity of the brain's behavioral control system. Initially, drinking may co-opt a brain network that underlies goal-directed (reward-motivated) behavior. After dependence onsets, drinking may shift to a network that mediates habit learning, or compulsivity. Human fMRI studies suggest that these networks are active when individuals are exposed to alcohol cues and also when they are at rest. Further, their integrity may be related to neurocognitive deficits in executive functioning. However, these networks have not been studied systematically in human alcoholics. This proposal will use fMRI connectivity analysis to test connectivity of the goal-directed and habit learning networks among non-dependent heavy drinkers and alcohol-dependent individuals. There are three specific aims: 1) to identify the connectivity differences between these groups during alcohol cue reactivity; 2) to identify such differences between groups while at rest; and 3) to determine whether connectivity differences are related to individual differences in neurocognitive impairment. Understanding shifts in the dominance of brain networks subserving reward and habit will ultimately contribute to the development of more efficacious treatments for alcohol dependence.

描述（由申请人提供）：功能磁共振成像（fMRI）的出现深刻推进了对人类大脑的理解。功能磁共振成像最令人兴奋的前沿应用之一是连通性分析，它不仅揭示了参与给定神经过程的单独大脑区域，还揭示了这些区域彼此相互作用的方式。这种相互作用的功能障碍可以说是人类精神病理学的症结所在。连接性分析可能会特别促进对酒精依赖（酒精中毒）的神经生物学的理解，酒精依赖是一种进行性、慢性复发的疾病，每年影响八百万美国人。这种疾病通常始于奖励驱动的大量饮酒，最终发展成一种习惯性、强迫性的饮酒模式。成瘾动物模型表明，这一转变的一个关键因素是大脑行为控制系统连接性的普遍转变。最初，饮酒可能会选择一个作为目标导向（奖励驱动）行为基础的大脑网络。依赖性发作后，饮酒可能会转变为介导习惯学习或强迫性的网络。人类功能磁共振成像研究表明，当个体接触酒精暗示以及休息时，这些网络都会活跃。此外，它们的完整性可能与执行功能的神经认知缺陷有关。然而，这些网络尚未在人类酗酒者中进行系统研究。该提案将使用功能磁共振成像连接分析来测试非依赖性重度饮酒者和酒精依赖者之间目标导向和习惯学习网络的连通性。有三个具体目标：1）确定这些群体在酒精提示反应期间的连接差异； 2）识别休息时各组之间的差异； 3）确定连通性差异是否与神经认知障碍的个体差异有关。了解促进奖赏和习惯的大脑网络主导地位的变化将最终有助于开发更有效的酒精依赖治疗方法。