The influence of random branch lengths of dendrites on the passive electrical structure of the neurons: model study
Keywords:
electrical structure, stochastic model, dendritic arborization, computer modeling, NEURONAbstract
The influence of random branch length of dendrites on the electrotonic (passive electrical) structure is shown by the computer models of the passive stochastic arborization. The electrotonic structure of models was computed as the arborization of somatopetal current transfer effectiveness profiles. The dendrites are considered as passive cables with zero leakage at the tip ("sealed-end" boundary condition). The models with the uniform in the interval and normal distribution of branch lengths showed that the distribution of the current transfer effectiveness becomes displaced to the side of smaller values. The criterion of resolving the dendritic branches by the effectiveness of somatopetal current transfer was described. The model of asymmetrical stochastic arborization showed both: the possibility to use this criterion to resolve the groups of branches and the characteristic changes of resolution conditions caused by changes of membrane resistivity.
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