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- W2895540533 endingPage "79" @default.
- W2895540533 startingPage "70" @default.
- W2895540533 abstract "The direct and indirect pathway striatal medium spiny neurons (dMSNs and iMSNs) have long been linked to action selection, but the precise roles of these neurons in this process remain unclear. Here, we review different models of striatal pathway function, focusing on the classic “go/no-go” model which posits that dMSNs facilitate movement while iMSNs inhibit movement, and the “complementary” model, which argues that dMSNs facilitate the selection of specific actions while iMSNs inhibit potentially conflicting actions. We discuss the merits and shortcomings of these models and propose a “competitive” model to explain the contribution of these two pathways to behavior. The “competitive” model argues that rather than inhibiting conflicting actions, iMSNs are tuned to the same actions that dMSNs facilitate, and the two populations “compete” to determine the animal’s behavioral response. This model provides a theoretical explanation for how these pathways work together to select actions. In addition, it provides a link between action selection and behavioral reinforcement, via modulating synaptic strength at inputs onto dMSNs and iMSNs. Finally, this model makes predictions about how imbalances in the activity of these pathways may underlie behavioral traits associated with psychiatric disorders. Understanding the roles of these striatal pathways in action selection may help to clarify the neuronal mechanisms of decision-making under normal and pathological conditions." @default.
- W2895540533 created "2018-10-12" @default.
- W2895540533 creator A5003406526 @default.
- W2895540533 creator A5061918050 @default.
- W2895540533 creator A5066225119 @default.
- W2895540533 creator A5075387929 @default.
- W2895540533 date "2019-06-01" @default.
- W2895540533 modified "2023-10-17" @default.
- W2895540533 title "A competitive model for striatal action selection" @default.
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