Fig. 3
Population changes in noise correlation as a function of RF overlap and target location. a Population-level changes in noise correlations for overlapping and partially overlapping pairs of neurons. For pairs of neurons with overlapping RFs, remembering a stimulus at the Peak location increased the noise correlation relative to a location in the opposite hemifield (blue; n = 43, p = 0.023). For pairs of neurons with partially overlapping RFs, remembering an In-flank location decreased the noise correlation relative to a location in the opposite hemifield (red; n = 103, p = 0.0006). b Heatmap shows the change in noise correlation (IN–OUT condition) for pairs of neurons sorted based on their RF overlap (y-axis) and the memory location relative to their maximal responses. This is a continuous plot of the data grouped into overlapping and partially overlapping populations in (a). Memory location is plotted relative to the normalized response level of the neurons at that location. Data on both axes were binned in units of 0.3. The main effects are visible here: for overlapping neurons (shared RF ratio>0.5), target locations near the peak of both RFs (high x-axis value, corresponding to Peak designation in Fig. 2b) show increased correlation. For partially overlapping neurons (0.1<shared RF ratio< 0.4), target locations with intermediate responses from both neurons (middle x-axis values, corresponding to In-flank designation in Fig. 2e) show decorrelation. c Population-level changes in noise correlations for overlapping and partially overlapping pairs of neurons. Same as (a), but comparing memory IN to a memory location outside both neurons’ RFs but in the same visual hemifield. For pairs of neurons with overlapping RFs, remembering a stimulus at the Peak location increased the noise correlation relative to a location outside both RFs (blue; n = 43, p = 0.039). For pairs of neurons with partially overlapping RFs, remembering an In-flank location decreased the noise correlation relative to a location outside both RFs (red; n = 103, p = 0.017)
