Regensburg 2010 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 29: Spatially Extended Dynamical Systems
DY 29.1: Talk
Thursday, March 25, 2010, 14:00–14:15, H46
Modeling of the gamma- and theta waves propagation in the region CA3 of hippocampus. — •Anastasia I. Lavrova1 and Eugene B. Postnikov2 — 1Institut für Physik Humboldt - Universität zu Berlin, Deutschland — 2Staatliche Universität Kursk, Russland
It is known that hippocampus is a structure required for processes of learning and memory [1]. Gloveli et al. [2] reported that the dynamics of neuron network of CA3 region exhibits some types of oscillations, so called gamma (30-80 Hz) and theta(4-12Hz) rhythms. These oscillations are responsible for information transmission, storage, and spatial encoding [1,2]. Also, it have been shown that gamma and theta rhythms are generated by different types of cells in CA3 region of hippocampus. The minimal network scheme, describing connections between different types of cells and its detailed model have been studied in [1,2]. We construct the simple discrete model based on the scheme suggested in [2], which reproduces important physical characteristics of the oscillations of all cells types: the period, amplitude and phase shift. This model allows to analyze an influence of synaptic connections between cells on the mention characteristics. Moreover, we consider a space distribution of the minimal network elements and noise in the interaction between them. We study how the noise can influence on the strength of the cells interaction and gamma and theta waves propagation. 1. Gloveli T., Dugladze T.,Rotstein H.,Traub R., Monyer H., Heinemann U., Whittington M., Kopell N., PNAS, V.102 13295-300,(2005) 2. Tort A., Rotstein H., Dugladze T., Gloveli T., Kopell N., PNAS, V.104, 13490-95, (2007)