Abstract
We discuss how to indicate the logicality and connectivity from living neuronal network in vitro. Rat hippocampal neurons are organized into complex networks in a culture dish with 64 planar microelectrodes. We have already proposed a model to analyse logic of signals of three electrodes in a culture dish with t-norm and t-conorm connectives. However, in this paper, we expand the electrode space which is analyzed, and discuss the logicality and connectivity of cultured neuronal network from the view of signal transfer with propagation, spread and convergence. First, we define the transfer pattern of pulse signal with formulation of propagation, spread and convergence. Next, the connectivity of electrodes is defined by contribution of fuzzy sets which represents signal strength. The useful of the model is evaluated by experiment data of cultured neuronal network.
