Before revision:  Assuming that the activation sensors are independent and that activation has a faster relaxation than inactivation , the fast inactivation rate function is, in general, dependent on the activation variable m(t) but may be approximated by a voltage-dependent function, and the rate function for entry into the slow inactivated state is dependent on the fast inactivation variable . The kinetic equations may be further reduced to rate equations for activation, and coupled fast and slow inactivation that describe spike frequency adaptation and a repetitive bursting oscillation in the neural membrane, and a cardiac action potential with a plateau oscillation .
After revision:  Assuming that the activation sensors are independent and that activation has a faster relaxation than inactivation , the fast inactivation rate function is, in general, dependent on the activation variable m(t) but may be approximated by a voltage-dependent function, and the rate function for entry into the slow inactivated state is dependent on the fast inactivation variable .