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• W2408893604 abstract "The mediodorsal thalamus (MDT) is a higher-order corticocortical thalamic nucleus involved in cognition and memory. However, anatomically, the MDT is also the primary site of olfactory representation in the thalamus, receiving strong inputs from olfactory cortex and having reciprocal connections with orbitofrontal cortex (OFC). Nonetheless, its role in olfaction remains unclear. Here, we recorded single units in the MDT, as well as local field potentials in the MDT, piriform cortex (PCX), and OFC in rats performing a two-alternative odor discrimination task. We show that subsets of MDT units display odorant selectivity during sampling, as well as encoding of spatio-motor aspects of the task. Furthermore, the olfactory trans-thalamic network rapidly switches functional connectivity between MDT and cortical areas depending on current task demands, with, for example, MDT-PCX coupling enhanced during odor sampling and MDT-OFC coupling enhanced during the decision/goal approach compared with baseline and presampling. These results demonstrate MDT representation of diverse sensorimotor components of an olfactory task.The mediodorsal thalamus (MDT) is the major olfactory thalamic nucleus and links the olfactory archicortex with the prefrontal neocortex. The MDT is well known to be involved in higher-order cognitive and memory functions, but its role in olfaction is poorly understood. Here, using single-unit and local field potential analyses, we explored MDT function during an odor-guided decision task in rats. We describe MDT odor and multisensory coding and demonstrate behavior-dependent functional connectivity within the MDT/sensory cortex/prefrontal cortex network. Our results suggest a rich representation of olfactory and other information within MDT required to perform this odor-guided task. Our work opens a new model system for understanding MDT function and exploring the important role of MDT in cortical-cortical communication." @default.
• W2408893604 created "2016-06-24" @default.
• W2408893604 creator A5013559745 @default.
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• W2408893604 date "2016-06-01" @default.
• W2408893604 modified "2023-10-14" @default.
• W2408893604 title "Neural Representation of Odor-Guided Behavior in the Rat Olfactory Thalamus" @default.
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• W2408893604 doi "https://doi.org/10.1523/jneurosci.0533-16.2016" @default.
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