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. 2018 Sep 5;38(36):7787–7799. doi: 10.1523/JNEUROSCI.2667-17.2018

Figure 9.

Figure 9.

Mutual information between M1 activity and hand velocity. A, Normalized mutual information between M1 neuron activity and hand velocity for the example neuron shown in Figure 4 (m5–b022). Hand velocity was projected to the neuron's PD (PDVel). Positive and negative lag indicates firing activity has information about future and past hand velocity, respectively. Crosshair indicates peak and its time lag. B, Histogram of peak lag time for mutual information between M1 activity and PDVel (443 neurons). Horizontal bars beneath the x-axis indicate the approximate lag time ranges for sensory feedback (black), forward estimate (gray), and motor command (black) representations. C, Averaged PDVel across all trials included for this analysis (27,286 trials). Solid line and shade indicates mean ± SD, respectively. Gray rectangle indicates the analytical time window when lag time is zero. D, Averaged PDVel and different analytical time windows. Gray rectangles indicate time windows. Scale bar, 10 cm/s. E, Histogram of peak lag time for mutual information between M1 activity and PDVel. Same format as B.