Fig 6. Mutual information between locomotion speed and firing rate.

(A) Normalised mutual information for four example units for different time lags; predictive units (maximum mutual information occurring at lag > 0) are indicated by dashed lines, and retrospective units (optimal delay < 0) by solid lines. For each type, two examples are shown: one that either increases or decreases with time and one with a peak either before or after zero lag. (B) Top: Histogram of the distribution of the peaks at which maximal mutual information is found for units responsive to movement and modulated by speed (bin size 50 ms). Bottom: maximal mutual information values of the units responsive to movement and modulated by speed with respect to the time lag. (C) Time lags at which maximal mutual information peaks for the different putative cerebellar cell classes.