3.2 ADDITIVE NEURONAL DYNAMICS Membrane Time Constants The membrane time constant C.scales the time variable of the activation dynamical system. The multiplicative constant model: Cixi=-AiXi (3一8) 2006.10.92006.10.9 The membrane time constant scales the time variable of the activation dynamical system. The multiplicative constant model: Ci i i i i C x = -A x • （3－8） 3.2 ADDITIVE NEURONAL DYNAMICS ◆ Membrane Time Constants