Summary
International Symposium on Nonlinear Theory and its Applications
2010
Session Number:B1L-C
Session:
Number:B1L-C5
Directional Spike Propagation by Anisotropic Inhibitory Connections Modulated through STDP in a Recurrent Network
Toshikazu Samura, Hatsuo Hayashi,
pp.241-244
Publication Date:2010/9/5
Online ISSN:2188-5079
Summary:
It has been supposed that theta oscillations are synchronized across the hippocampus. However, it was reported last year that the theta oscillations propagate along the septotemporal axis in the hippocampal CA1. Although this requires that the hippocampal functions are reconsidered based on the propagation of the theta oscillations, it has not been well understood how the directional propagation is produced in the hippocampus. One of the reasonable mechanisms is that directional spike propagation in the hippocampal CA3 is reflected in the CA1 because the CA3 has rich excitatory recurrent connections. In this paper, we investigated whether the directional propagation emerges in a recurrent network, and found that it was produced certainly when the distance of inhibitory connections was anisotropic and weights of excitatory connections from excitatory neurons to inhibitory interneurons were modified through STDP