Multiple value signals in dopaminergic midbrain and their role in avoidance contexts.
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TLDR
It is shown that neural responses in ventral striatum and ventral tegmental area/substantial nigra (VTA/SN) covaried with net expected value, which is larger for both big rewards and big punishments.About:
This article is published in NeuroImage.The article was published on 2016-07-15 and is currently open access. It has received 12 citations till now. The article focuses on the topics: Ventral tegmental area & Ventral striatum.read more
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Journal ArticleDOI
Valuation of Knowledge and Ignorance in Mesolimbic Reward Circuitry
TL;DR: It is shown that valence is central to the process by which the human brain evaluates the opportunity to gain information and why knowledge may not always be preferred, explaining why knowledge is not always preferred.
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Anatomical and functional organization of the human substantia nigra and its connections.
TL;DR: There is anatomical and functional heterogeneity of human SN, which underpins value versus salience coding, and impulsive choice versus impulsive action, according to limbic, cognitive, motor arrangement.
Journal ArticleDOI
Avoidance Problems Reconsidered.
TL;DR: These studies strongly suggest that avoidance has an instrumental component and is mediated by brain circuits that resemble appetitive instrumental actions more than Pavlovian fear reactions, which has important implications for understanding human resilience and disorders of control.
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Dopamine modulates individual differences in avoidance behavior: A pharmacological, immunohistochemical, neurochemical and volumetric investigation.
Geiza Fernanda Antunes,Flavia Venetucci Gouveia,Fabiana Strambio Rezende,Midiã Dias de Jesus Seno,Milene Cristina de Carvalho,Caroline C. Oliveira,Lennon Cardoso Tosati dos Santos,Marina Correia de Castro,Mayra A. Kuroki,Manoel Jacobsen Teixeira,José Pinhata Otoch,Marcus Lira Brandão,Erich Talamoni Fonoff,Raquel Chacon Ruiz Martinez +13 more
TL;DR: The results showed that it could be possible to convert animals from good to poor performers, and vice versa, by intra-amygdala injections of D1 receptor antagonists in good performers or D2 receptor agonists in poor performers.
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Learning Contextual Reward Expectations for Value Adaptation.
TL;DR: A recent observation that participants performing a gambling task adjust their preferences as a function of context is exploited to show that, in the absence of contextual cues providing reward information, an average reward expectation was learned from recent past experience.
References
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What is the role of dopamine in reward: hedonic impact, reward learning, or incentive salience?
TL;DR: It is suggested that dopamine may be more important to incentive salience attributions to the neural representations of reward-related stimuli and is a distinct component of motivation and reward.
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Anticipation of increasing monetary reward selectively recruits nucleus accumbens.
TL;DR: Findings suggest that whereas other striatal areas may code for expected incentive magnitude, a region in the NAcc codes for expected positive incentive value, which is correlated with individual differences in self-reported happiness elicited by the reward cues.
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Dissociable roles of ventral and dorsal striatum in instrumental conditioning
John P. O'Doherty,Peter Dayan,Johannes Schultz,Ralf Deichmann,Karl J. Friston,Raymond J. Dolan +5 more
TL;DR: This work scanned human participants with functional magnetic resonance imaging while they engaged in instrumental conditioning to suggest partly dissociable contributions of the ventral and dorsal striatum to the critic and the actor.
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Valid conjunction inference with the minimum statistic.
TL;DR: A survey of recent practice in neuroimaging reveals that the MS/GN test is very often misinterpreted as evidence of a logical AND, and it is suggested that the revised test proposed here is the appropriate means for conjunction inference in Neuroimaging.
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Dopamine in Motivational Control: Rewarding, Aversive, and Alerting
TL;DR: It is proposed that dopamine neurons come in multiple types that are connected with distinct brain networks and have distinct roles in motivational control, and it is hypothesized that these dopaminergic pathways for value, salience, and alerting cooperate to support adaptive behavior.