Keywords
Reward
Dopamine
Goal-Directed Behavior
Cognitive Neuroscience
How to Cite
Abstract
Motivation for goal-directed behaviors depends on the hierarchical orchestration between brain systems of valuation and executive control. This integrative review synthesized evidence that dopamine, acting on the mesocorticolimbic axis, primarily signals reward prediction error and mobilizes the effort necessary for action, underpinning the motivational "wanting" component. This signal is integrated by corticostriatal circuits, in which the functional connectivity between the ventral striatum and the dorsolateral prefrontal cortex is essential for transforming valuation into persistent action plans capable of overcoming costs and distractions. Dysregulation of this system generates opposing psychopathologies: hypofunction and frontostriatal disconnection are associated with apathy and anhedonia in depression, while hypersensitization of the reward system to specific stimuli sustains compulsive seeking in addiction. It is concluded that adaptive motivation requires dynamic balance and effective communication within this network, offering an integrated model for the development of targeted interventions.
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