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. Author manuscript; available in PMC: 2016 Sep 24.
Published in final edited form as: Brain Res. 2014 Nov 10;1621:345–354. doi: 10.1016/j.brainres.2014.10.069

Figure 2.

Figure 2

Examples of neural firing correlated over long periods of time. Each panel gives the spikes fired over a recording session. Each row gives a different trial of a continuous recognition task, aligned to the presentation of the stimulus (vertical line). At the bottom a PSTH is shown. On the right of each panel, the cell’s firing rate for each trial is shown. Note the robust autocorrelation—the firing of each cell changes gradually over many many trials. The entire experiment takes about 300 s. a. This cell shows autocorrelated firing over a few trials. Each trial is approximately 4 s, so this constitutes a change over about a dozen seconds. b. This cell shows autocorrelation over about 10 trials, corresponding to several dozen seconds. c. This cell shows autocorrelation over a few dozen trials, corresponding to a few minutes. After Howard, et al. (2012).