Figure 3.

Task-related modulation of firing rate during the simple reaction time task. A, The mean firing rate was visibly modulated around most task events. Neural activity is depicted as the mean normalized firing rate of all neurons. Gray bands depict the SEM. Activity was highest during times of locomotion, but visibly modulated even around stimulus onset. B, The percentage of neurons modulated around each task event was determined by comparing firing rates before and after the event (±200 ms windows, signrank test, p < 0.05). Just over half of all neurons had a modulation of firing rate at nosepoke exit, more than at any other single event in the task.