p544fig15.09 As always, the habituative transmitter gate yi increases in response to accumulation and decreases due to gated inactivation, leading to the kinds of transmitter and output responses in the right hand column.<BR>||  Habituative transmitter gate (Grossberg 1968).  1. d[dt: yi] = c*(1-yi) - D*f(xi)*yi, C-term - accumulation, D-term gated inactivation.   2. Sigmoid signal  f(xi) = xi^n / (B^n + xi^n).  3. Gated output signal f(xi)*yi.