Motivational control of goal-directed actions and habits
对目标导向的行为和习惯的动机控制
基本信息
- 批准号:7876013
- 负责人:
- 金额:$ 7.7万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2010
- 资助国家:美国
- 起止时间:2010-04-01 至 2012-03-31
- 项目状态:已结题
- 来源:
- 关键词:AbstinenceAnimalsBehaviorBehavioralBiological AssayCuesDataDrug AddictionEnvironmentExtinction (Psychology)FeedbackFoodFundingFutureGoalsHabitsKnowledgeLaboratoriesLawsLeadMediatingModelingMolecular GeneticsMotivationMusNeurobiologyOperant ConditioningOutcomePharmaceutical PreparationsPlayProceduresProcessPsychological reinforcementPublicationsRelapseRewardsRoleScheduleSignal TransductionStimulusTechniquesTestingTimeTrainingUnconscious StateWithdrawalYinaddictionclassical conditioningcompare effectivenesscravingdrug relapseinsightmotivated behaviormotivational processesneuromechanismpublic health relevancereinforced behaviorresearch studyresponse
项目摘要
DESCRIPTION (provided by applicant): The goal of this project is to examine the motivational effects of reward cues on habitual responding. Habits are behaviors that have become unconscious and automatic as a result of repeated pairings with reinforcement (A. Dickinson, 1985; H. H. Yin and B. J. Knowlton, 2006). They are elicited reflexively by stimuli in the environment and are not responsive to feedback. Not surprisingly then, habits play a major role in addiction where maladaptive behavior persists despite the fact that drugs lose their rewarding effects over time and produce many unwanted, aversive consequences (P. W. Kalivas and N. D. Volkow, 2005; T. W. Robbins et al., 2008). Although reward cues are known to influence goal-directed actions, the extent to which they motivate habitual responding has not been well characterized (P. C. Holland, 2004). This process is critical to our understanding of addiction, as environmental cues associated with drugs are major contributors to relapse (B. J. Everitt and T. W. Robbins, 2005; P. W. Kalivas and N. D. Volkow, 2005). The current experiments will examine this motivational process using operant conditioning techniques in mice. The purpose is to determine if habits are particularly responsive to reward cues compared to goal-directed actions. Animals will be trained to press levers in order to obtain food rewards. For some animals these rewards will be delivered on variable interval schedules (where reward is contingent on responding after a specific amount of time has passed) that have been shown to promote habitual responding. Other animals will be trained on ratio schedules (where reward delivery is contingent on the number of responses made), which have been shown to promote the acquisition of goal-directed actions (Dickinson, Nicholas, & Adams, 1983; Yin, Knowlton, & Balleine, 2004). The motivational effects of reward cues will be modeled with two procedures: Pavlovian-instrumental transfer (PIT) and reinstatement (Wiltgen, Law, Ostlund, Mayford, & Balleine, 2007). In the PIT procedure, environmental cues acquire significance as predictors of reward through Pavlovian conditioning and are then able to exert motivational control over instrumental actions (Colwill, 1988). Reinstatement is an assay of outcome-mediated initiation of instrumental behavior in which delivery of the reward itself primes and motivates behavior after a period of extinction (Delamater, 1997; Ostlund & Balline, 2007). Our prediction is that habitual responding will be more susceptible to the effects of reward cues (i.e. increased rate of responding) than goal-directed actions.
PUBLIC HEALTH RELEVANCE: This project will determine how automatic, unconscious behaviors called habits are motivated by reward cues in the environment. Habits are normally adaptive because they allow reliably reinforced behaviors to become efficient and automatic. However, they can also be maladaptive when they produce behaviors like those that maintain drug addiction. Therefore, understanding the mechanisms by which reward cues motivate habitual responding will lead to a better understanding of drug relapse and its underlying neural mechanisms.
描述(由申请人提供):这个项目的目标是检查奖励线索对习惯性反应的激励作用。习惯是一种无意识的、自动的行为,是反复与强化配对的结果。Dickinson,1985; H. H. Yin和B。诺尔顿,2006年)。它们是由环境中的刺激条件反射性地引起的,对反馈没有反应。毫不奇怪,习惯在成瘾中起着重要作用,尽管药物随着时间的推移失去了奖励作用,并产生了许多不想要的,令人厌恶的后果,但适应不良的行为仍然存在。Kalivas和N. D. J.C.,2005; T. W. Robbins等人,2008年)。虽然奖励线索是众所周知的影响目标导向的行动,在多大程度上,他们激励习惯性反应还没有得到很好的特点(P。Holland,2004)。这一过程对我们理解成瘾至关重要,因为与药物相关的环境线索是复发的主要因素(B)。J. Everitt和T. W. Robbins,2005; P. W. Kalivas和N. D. 2005年)。目前的实验将在小鼠中使用操作性条件反射技术来检查这种动机过程。目的是确定与目标导向的行动相比,习惯是否对奖励线索特别敏感。动物将被训练按下杠杆以获得食物奖励。对于某些动物,这些奖励将以可变的间隔时间表(奖励取决于特定时间后的反应)提供,这已被证明可以促进习惯性反应。其他动物将接受比例训练(奖励的发放取决于做出的反应数量),这已被证明可以促进目标导向行动的获得(Dickinson,Nicholas,&亚当斯,1983; Yin,诺尔顿,& Balleine,2004)。奖励线索的激励效应将通过两个程序来建模:巴甫洛夫工具转移(PIT)和恢复(Wiltgen,Law,Ostlund,Mayford和Balleine,2007)。在PIT过程中,环境线索通过巴甫洛夫条件反射获得重要性作为奖励的预测因素,然后能够对工具性行为施加动机控制(Colwill,1988)。恢复是一种结果介导的工具性行为启动的分析,其中奖励本身的交付在一段时间的灭绝后启动和激励行为(Delamater,1997; Ostlund & Baline,2007)。我们的预测是,习惯性反应比目标导向的行动更容易受到奖励线索的影响(即反应速度的增加)。
公共卫生相关性:这个项目将确定如何自动,无意识的行为称为习惯是由奖励线索在环境中的动机。习惯通常是适应性的,因为它们允许可靠的强化行为变得有效和自动。然而,当他们产生类似维持毒瘾的行为时,他们也可能适应不良。因此,了解奖励线索激发习惯性反应的机制将有助于更好地理解药物复吸及其潜在的神经机制。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The effect of ratio and interval training on Pavlovian-instrumental transfer in mice.
比率和间歇训练对小鼠巴甫洛夫仪器转移的影响。
- DOI:10.1371/journal.pone.0048227
- 发表时间:2012
- 期刊:
- 影响因子:3.7
- 作者:Wiltgen,BrianJ;Sinclair,Courtney;Lane,Chadrick;Barrows,Frank;Molina,Martín;Chabanon-Hicks,Chloe
- 通讯作者:Chabanon-Hicks,Chloe
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Brian J Wiltgen其他文献
Brian J Wiltgen的其他文献
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