Figure 2. Somatic to dendritic steady-state voltage attenuation.

The ratio of the dendritic steady-state voltage response (long current pulse) to the somatic steady-state amplitude is plotted as a function of distance in control (○, n= 34) or with H current blocked (5 mm CsCl, •, n= 16; 50–100 μm ZD7288, ▪, n= 5). Data were fitted with a linear function. The 50% attenuation distance in control was 238 μm and in 5 mm CsCl was 409 μm (extrapolated).