Biophysical modeling of thalamic reticular nucleus subpopulations and their differential contribution to spindle dynamics.
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Abstract | Burst firing in thalamic reticular neurons is key to sleep rhythms and is linked to neurodevelopmental disorders. Several models of reticular neurons are currently available; however, a biophysically detailed model reproducing experimental burst firing heterogeneity is lacking. We addressed this by combining patch-clamp electrophysiology of fluorescently tagged Spp1+ and Ecel1+ neurons with a previously established statistical framework to differentiate cell types. We developed a population of biophysically detailed thalamic reticular models capturing diverse firing properties, particularly varied rebound bursting. These models incorporate key ion channels, such as T-type Ca and small conductance potassium channels (SK), allowing systematic study of their impact on single-cell dynamics. By integrating these models into a thalamic microcircuit, we demonstrate that T-type Ca and SK channel conductances have opposing effects on spindle oscillations. We identify a simple relationship between these conductances and spindle peak firing frequency, and provide a foundation for relating cellular properties to network activity. |
Year of Publication | 2025
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Journal | iScience
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Volume | 28
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Issue | 9
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Pages | 113393
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Date Published | 09/2025
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ISSN | 2589-0042
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DOI | 10.1016/j.isci.2025.113393
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PubMed ID | 40995120
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