Figure 3.

Memory of Stimulus during Interstimulus Delay

(A) Example raster plot (top), time-dependent firing rate (middle), and stimulus information plot (bottom) of a vS1 unit encoding the memory of stimulus1 in parts of the delay period. Plots are in the same format as Figures 2A and 2B. Colored bars mark early delay (ED) (first 500 ms of interstimulus delay), mid-delay (MD) (middle 500 ms of interstimulus delay), and late delay (LD) (last 500 ms of interstimulus delay) epochs as well as the post-stimulus2 (500-ms window following stimulus2).

(B) Same as (A) but for an example PL memory unit.

(C) Scatter plot showing the cumulative stimulus information versus p value of the test of significance of information. Significance of information is examined by comparing the observed cumulative information during each epoch to shuffled distribution for individual units.

(D) Percentage of memory-encoding units in each cortical region during different epochs of the interstimulus delay period and post stimulus2.

See also Figure S2.