Figure 1.

Theta electrode-evoked EPSP amplitudes are largely independent of distance from the soma beyond 35 μm. A, Schematic diagram showing the experimental layout, including theta-stimulating pipette (S). B, Representative average traces from a single neuron at 3 different dendritic stimulating locations showing that the amplitude measured at the soma was not affected by distance from the soma. C, EPSP amplitudes plotted as function of the distance from the soma; n = 17. Gray lines connect measurements obtained from the same cell. D, The change in EPSP amplitude plotted relative to the change in distance from the soma for theta electrode recordings that sampled multiple locations on the same cell; n = 13 comparisons. Gray line is at 0 mV change. Points above this line indicate an increased amplitude with increased distance from the soma. Points below the line indicate a decrease.