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• W2023743916 endingPage "2270" @default.
• W2023743916 startingPage "2260" @default.
• W2023743916 abstract "The aim of this work was to explore the electrical spatial profile of the dendritic arborization during membrane potential oscillations of a bistable motoneuron. Computational simulations provided the spatial counterparts of the temporal dynamics of bistability and allowed simultaneous depiction the electrical states of any sites in the arborization. We assumed that the dendritic membrane had homogeneously distributed specific electrical properties and was equipped with a cocktail of passive extrasynaptic and NMDA synaptic conductances. The electrical conditions for evoking bistability in a single isopotential compartment and in a whole dendritic arborization were computed and showed differences, revealing a crucial effect of dendritic geometry. Snapshots of the whole arborization during bistability revealed the spatial distribution of the density of the transmembrane current generated at the synapses and the effectiveness of the current transfer from any dendritic site to the soma. These functional maps changed dynamically according to the phase of the oscillatory cycle. In the low depolarization state, the current density was low in the proximal dendrites and higher in the distal parts of the arborization while the transfer effectiveness varied in a narrow range with small differences between proximal and distal dendritic segments. When the neuron switched to high depolarization state, the current density was high in the proximal dendrites and low in the distal branches while a large domain of the dendritic field became electrically disconnected beyond 200 micro m from the soma with a null transfer efficiency. These spatial reconfigurations affected dynamically the size and shape of the functional dendritic field and were strongly geometry-dependent." @default.
• W2023743916 created "2016-06-24" @default.
• W2023743916 creator A5029433260 @default.
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• W2023743916 date "2002-12-01" @default.
• W2023743916 modified "2023-10-03" @default.
• W2023743916 title "Spatial reconfiguration of charge transfer effectiveness in active bistable dendritic arborizations" @default.
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• W2023743916 doi "https://doi.org/10.1046/j.1460-9568.2002.02312.x" @default.
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