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. 2010 Jul 21;99(2):427–436. doi: 10.1016/j.bpj.2010.04.056

Figure 3.

Figure 3

Electroctonic equivalent cables. (A) Responses of the somatofugal cable to CF inputs. Starting from either R or P, the CF (gCF = 1.2 μS uniformly distributed over smooth dendrites) triggers a burst of Ca spikes (s), followed by a plateau (p) or a valley (v) and convergence to R or P. Samples of RsR, RspR, RsP (A1), PspR and PsP (A2), and PsvP and PsR (A3) responses are shown with the corresponding Idc value (nA/cm2). (A4) Duration (d) of plateaus and valleys versus Idc. (B) Responses of somatopetal reduced cables to distal inputs. Membrane potential of the farthest dendritic point from the soma (black) stimulated by EPSC/IPSC trains, and the soma (red). Green: Membrane current at the stimulation site. Blue: Synaptic currents. Five (B1), eight (B2), and 10 (B3) EPSCs with gPF = 0.1 μS/cm2; Idc = −25 nA/cm2. Six IPSCs (B4) with gSC = 0.5 μS/cm2 and Idc = 45 nA/cm2. (C) Duration of plateaus (C1: six EPSCs; C3: gPF = 0.5 μS/cm2; Idc = −25 nA/cm2) and valleys (C2: 6 IPSC; Idc = 45 nA/cm2) as a function of synaptic parameters. S (absicca): Stimulated membrane surface.