NEURONAL DYNAMICS I:ACTIVATIONS AND SIGNALS SIGNAL MONOTONICITY Signal and activation velocities the signal velocity:S =dS/dt 5= dS dx dx dt -Sx Signal velocities depend explicitly on action velocities 99 SIGNAL MONOTONICITY Signal and activation velocities the signal velocity: =dS/dt Signal velocities depend explicitly on action velocities S  S x dt dx dx dS S   = = ' NEURONAL DYNAMICS Ⅰ: ACTIVATIONS AND SIGNALS