Fig. 12.

Responses of two postsynaptic neurons recorded simultaneously in response to stimulation of B4/5. A, B, IPSCs from a 10 sec segment of a random stimulus train. The amplitude of the currents in both neurons is normalized by the first event to facilitate comparison. Both neurons show similar features, notably an initial rapid depression and a sustained slow depression, as well as short-term facilitation after short interspike intervals. The rapid onset of depression in the lower neuron, however, is more pronounced. C–I, Plots of the parameter values from one neuron versus the other. The neuron with the smaller average IPSC in each pair is assigned plotted along the ordinate, and other neuron in the pair is plotted along the abscissa. A full two-additive factors model was fit to each neuron in the pair, and the values for each of the seven parameters are plotted. Multiple stimuli for each pair are plotted with the symbols ×, ◊, and ○, indicating the neuron pair. Values that fall along the identity line indicate that both neurons in the pair have identical values for that parameter.