Regensburg 2007 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 32: Synchronization
DY 32.6: Vortrag
Freitag, 30. März 2007, 11:30–11:45, H3
Corticothalamic Projections control Synchronization in Ensembles of Bistable Thalamic Oscillators — •Jörg Mayer1, Heinz Georg Schuster1, Jens Christian Claussen1, and Mathias Mölle2 — 1Institut für Theoretische Physik und Astrophysik, Christian-Albrechts Universität, Olshausenstraße 40, 24098 Kiel — 2Department of Neuroendocrinology, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck
Thalamic circuits are able to generate state dependent oscillations of different frequencies and degrees of synchronization. Experimental findings suggest, that the simultaneous occurrence of spindle oscillations over widespread territories of the thalamus is due to the corticothalamic projections. Synchrony is lost in the decorticated thalamus. Here we introduce a generic model of a thalamic oscillator and study the influence of corticothalamic projections on the degree of synchrony in a network of such coupled oscillators. For this purpose we feed our model with slow wave stimuli. We uncover the underlying control mechanism, an compare our results with experimental observations. This leads to a control method which is applicable to a wide range of stochastically driven excitable units.