Models that contain the Model Concept : Intrinsic plasticity
(Neuronal or synaptic activity, especially the reception of neuromodulators can change properties, such as activation, inactivation curves, time constants, and conductances/conductance densities of intrinsic voltage-gated currents. See <a href="http://www.scholarpedia.org/article/Intrinsic_plasticity">http://www.scholarpedia.org/article/Intrinsic_plasticity</a>)