Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 7: Time-delayed feedback and neural networks

DY 7.3: Vortrag

Montag, 25. Februar 2008, 17:00–17:15, A 053

Suppression of pulses in excitable media by delayed nonlocal coupling — •Felix M. Schneider, Markus A. Dahlem, and Eckehard Schöll — Institut f. Theor. Physik, Sekr. EW 7-1, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

We investigate a FitzHugh-Nagumo system with diffusion in 1D close to the excitation limit. This serves a model of spatio-temporal neural excitation patterns in the cortex emerging from pathological pathways, e.g. during migraine, seizure, or stroke. We apply a range of control algorithms based on time-delayed feedback transmitted spatially along nonlocal connectivity patterns. We show through simulations that for different control schemes activity can be restricted to the pathological part of the network. Some control schemes reflect the nature of interneuronal cortical connections, where on short distances connections from inhibitory interneurons dominate, while on an intermediate range excitatory, lateral connections prevail.