Insular and prelimbic cortices control behavioral accuracy and precision in a temporal decision-making task in rats.

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ID: 278366
2024
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Abstract
The anterior insular cortex (AIC) comprises a region of sensory integration. It appears to detect salient events in order to guide goal-directed behavior, code tracking errors, and estimate the passage of time. Temporal processing in the AIC may be instantiated by the integration of representations of interoception. Projections between the AIC and the medial prefrontal cortex (mPFC) - found both in rats and humans - also suggest a possible role for these structures in the integration of autonomic responses during ongoing behavior. Few studies, however, have investigated the role of AIC and mPFC in decision-making and time estimation tasks. Moreover, their findings are not consistent, so the relationship between temporal decision-making and those areas remains unclear. The present study employed bilateral inactivations to explore the role of AIC and prelimbic cortex (PL) in rats during a temporal decision-making task. In this task, two levers are available simultaneously (but only one is active), one predicting reinforcement after a short, and the other after a long-fixed interval. Optimal performance requires a switch from the short to the long lever after the short-fixed interval elapsed and no reinforcement was delivered. Switch behavior from the short to the long lever was dependent on AIC and PL. During AIC inactivation, switch latencies became more variable, while during PL inactivation switch latencies became both more variable and less accurate. These findings point to a dissociation between AIC and PL in temporal decision-making, suggesting that the AIC is important for temporal precision, and PL is important for both temporal accuracy and precision.
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nepomoceno2024insularbehavioural Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Nepomoceno, Estela B;Rodrigues, Samanta;de Melo, Katia S;Ferreira, Tatiana L;Freestone, David;Caetano, Marcelo S;
Journal Behavioural brain research
Year 2024
DOI
10.1016/j.bbr.2024.114961
URL
Keywords
timing wistar decision-making under uncertainty muscimol switch task

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