Minimal plasticity model with -dependent time constant.

(A) Simulated back-propagating action potentials (, bottom) are composed of a peak (, top) and a tail (, middle). The two vertical dashes above the figure indicate the timing of post-synaptic spikes. (B) The -like variable is the scaled product of NMDAR activation and the BAP (see Methods). Grey and black vertical dashes indicate the timing of pre- and post-synaptic spikes respectively. (C) -dependent time constant , capturing the saturation of the mechanisms of extrusion at high levels.