Nature Rev. Neurosci. 4, 739–751 (2003)

In Figure 6b, the abscissa should read “Input frequency (Hz)”. The legend to figure 6b should read “The right panels show examples of interspike interval (ISI) histograms for stimulation at 4 ms and 12 ms interstimulus intervals, for the quiescent (bottom) and high-conductance (top) states.”