Fig. 3: Neuronal activity related to color.
From: Neuronal correlates of endogenous selective attention in the endbrain of crows
A Dot-raster plots and spike-density functions of an example neuron. Left: The example neuron shows difference in spike density between color 1 and color 2 (at top location) when cue is at top location (trials ncolor1 = 21, ncolor2 = 37). Right: Same neuron, activity for colors 1 and 2 at top location, when cue was not displayed at top location (trials ncolor1 = 63, ncolor2 = 67). Purple shading indicates a significant difference in firing rate. Upper part: dot-raster plot of neuronal spiking, each dot represents an individual spike, sorted and color coded based on color identity at the top location in the session. B Same as in (A) for a neuron showing a difference during the delay at the middle location (trials with cue ncolor1 = 52, ncolor2 = 44; trials when cue was not displayed at middle, ncolor1 = 100, ncolor2 = 96). C Color information in neuronal population (quantified as PEV, n = 356). The population of neurons encoded information about color at top, middle, and bottom locations (from top to bottom) when cue was at the respective location (solid lines). In contrast, when cue was not at the respective location (i.e., cue was instead at a different location, “cue-other”), the neuronal activity had no information about color (dashed lines). Lines indicate the mean PEV, and shaded areas around the mean are the standard error of the mean. The gray shaded area is the 95% interval [2.5 97.5] of PEV values attained after randomly shuffling the labels of color. Time periods when there is no overlap between a colored area and the gray area can be considered significantly different at p < 0.025 (based on permutation testing).
