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Dendritic Size and Topology Influence Burst Firing in Pyramidal Cells

  • Arjen van Ooyen
  • Ronald A. J. van Elburg
Chapter
Part of the Springer Series in Computational Neuroscience book series (NEUROSCI, volume 11)

Abstract

Neurons have highly branched dendrites that form characteristic tree-like structures. The morphology of these dendritic arborizations is not fixed and can undergo significant alterations in many pathological conditions. However, little is known about the impact of morphological changes on neuronal activity. Using computational models of pyramidal cells, we study the influence of dendritic tree size and branching structure on burst firing. Burst firing is the generation of two or more action potentials in close succession, a form of neuronal activity that is critically involved in neuronal signaling and synaptic plasticity. We show that there is only a range of dendritic tree sizes that supports burst firing, and that this range is modulated by the branching structure of the tree. Shortening as well as lengthening the dendritic tree, or even just modifying the pattern in which the branches in the tree are connected, can shift the cell’s firing pattern from bursting to tonic firing. The influence of dendritic morphology on burst firing is attributable to the effect that dendritic size and branching pattern have on the average spatial extent of the dendritic tree and the spatiotemporal dynamics of the dendritic membrane potential. Our results suggest that alterations in pyramidal cell morphology, such as those observed in Alzheimer’s disease, mental retardation, epilepsy, and chronic stress, can change neuronal burst firing and thus ultimately affect information processing and cognition.

Keywords

Pyramidal Cell Firing Pattern Dendritic Tree Interspike Interval Dendritic Morphology 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Computational Neuroscience Group, Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive ResearchVU UniversityAmsterdamThe Netherlands
  2. 2.Institute of Artificial Intelligence and Cognitive Engineering (ALICE)University of GroningenGroningenThe Netherlands

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