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CRCNS: Network mechanisms of the learning and encoding of timed motor responses

CRCNS：定时运动反应学习和编码的网络机制

基本信息

批准号：
9242196
负责人：
DEAN V BUONOMANO
金额：
$ 29.46万
依托单位：
UNIVERSITY OF CALIFORNIA LOS ANGELES
依托单位国家：
美国
项目类别：
财政年份：
2016
资助国家：
美国
起止时间：
2016-07-01 至 2021-06-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9242196
关键词：
Address Animals Area Axon Behavior Behavioral Behavioral trial Biological Neural Networks Brain Brain region Code Collection Complex Computational Technique Computer Simulation Computing Methodologies Corpus striatum structure Cues Data Data Analyses Data Set Electrophysiology (science)Engineering Environment Event Evolution Exhibits Future Goals Head Instruction Learning Linear Models Link Machine Learning Medial Mental disorders Motor Motor Activity Mus Neural Network Simulation Neurons Output Pattern Prefrontal Cortex Process Reaction Time Reading Recurrence Rewards Stimulus Structure Techniques Time Training Uncertainty Work analytical method awake base behavioral response behavioral study computer framework conditioning driving force dynamic system in vivo innovation millisecond nervous system disorder neural circuit neural patterning novel optogenetics pressure relating to nervous system response spatiotemporal temporal measurement

项目摘要

The brain is an inherently dynamic system, it evolved under strong selective pressures to allow animals to interact with the environment in real-time, and predict and prepare for future events. For these reasons, understanding neural dynamics, and how the brain tells and encodes time is fundamental to understanding brain function. The importance of neural dynamics and timing to brain function emphasizes the need for techniques that allow for the collection and analysis of massively parallel single neuron recordings across multiple structures in behaving animals. This project will combine novel electrophysiological, behavioral, analytical and computational methods to reverse engineer the neural circuits underlying learning and timing. The first aim is to combine large-scale neural recordings with computational approaches to determine how time is represented in the striatum and prefrontal cortex, two interacting brain areas that are closely implicated in temporal processing. We will specifically examine whether encoding of time relies on absolute, relative, or stimulus-specific coding mechanisms. Recordings will be carried out in awake, head-fixed mice trained on a classical trace reward conditioning task in which two cues predict reward with a different delay period. When animals learn the cue-reward association, they engage in robust anticipatory licking that precedes the reward presentation; moreover, the timing of this behavior is dependent on the cue-reward delay time. The second aim is to combine electrophysiology and optogenetics to determine if temporal coding in the striatum and prefrontal cortex is perturbed by transiently disrupting network activity. The hypothesis is that if dynamics of the timing circuits are perturbed then the ensuing activity patterns will be irreversibly altered, thus reducing the accuracy or precision of timed behavioral responses. The third aim is to develop a novel computational framework based on recurrent neural networks models that can predict "future" patterns of neural ensemble activity based on "present" patterns. The ultimate goal of this work is to integrate highly innovative electrophysiological and computational methods for reverse engineering brain circuit function at the level of networks of hundreds of neurons in the striatum and prefrontal cortex. RELEVANCE (See instructions): Learning to produce appropriately timed actions is fundamental to many aspects of behavior, and disruption of the brain circuits underlying this process is implicated in many neurological and psychiatric disorders. This project will develop an integrated approach to studying the mechanisms of timed motor behavior by combining large-scale neural recordings from multiple brain areas and computational modeling of neural networks.

大脑是一个内在的动态系统，它在强大的选择压力下进化，使动物能够