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Spatio-temporal filter theory is applied, on the basis of the describing function method, to anidealized nonlinear neuronal circuit of recurrently inhibited layer structure offering a model of synchronous neuronal activities in the brain.<BR>The filter theory suggests that the system dynamics is fundamentally determined by the Fourier transform of the spatio-temporal connection in the system and that the increase in connection weight and feedback delay may cause synchronous oscillation.<BR>The describing function for two sinusoids plus bias input reveals the competition among spatio-temporal dynamic modes such as synchronous oscillation, spatial waves, etc<BR>Computer simulation as well as the describing function analysis shows that abrupt mode transition occurs between a spatial wave and synchronous oscillation with either internal parameter changes or appropriate external inputs.<BR>These competitive relations among dynamic modes suggest possible connection with sudden mode transitions in EEG or in epilepsy.
- 一般社団法人 日本生体医工学会の論文
一般社団法人 日本生体医工学会 | 論文
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