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. 2016 Nov 16;117(2):665–683. doi: 10.1152/jn.00726.2016

Fig. 2.

Fig. 2.

Response patterns of PMd and M1 “decision” cells in the tokens task (from Thura and Cisek 2016). A, left: average activity of 61 “decision-related” PMd cells aligned on the 1st token jump in all trials during the fast blocks or slow blocks. In each block, activity is truncated 280 ms before movement onset (squares) and both error and correct trials are included. Center: average activity of the “decision-related” PMd cells during easy trials in which monkeys correctly chose the cells' preferred target (PT) or opposite target (OT) in the slow blocks or the fast block. To be included, cells had to be recorded during at least 5 trials per condition. Right: same as center for the “decision” PMd cells recorded in at least 5 misleading trials. B: same as A for a population of 78 M1 cells. C: average neural responses of 61 PMd decision-related cells aligned on movement onset when monkeys chose either the cells' PT (solid curves) or OT (dotted curves) in the slow (blue) or fast (red) blocks. D: same as C for a population of M1 cells. E: evolution of the relationship between neural firing and sensory evidence. Each line illustrates the relationship between the SumLogLR (see materials and methods) with respect to the PT and the mean neural activity averaged across 30 PMd (left) and 47 M1 (right) cells calculated 200 ms later in a 200-ms epoch, color coded from the darkest (1st token jump) to the lightest, in both the slow and the fast blocks. Only epochs preceding our estimate of decision time are included. F: evolution of the averaged activity of the PMd (n = 30, left) and M1 (n = 47, right) populations calculated for the condition when SumLogLR = 0 (the evidence is equal for each target) as a function of time in either the slow (blue) or the fast (red) blocks. For odd-numbered jumps, the firing rate at zero evidence was calculated by interpolation (filled circles). For even-numbered jumps, vertical bars represent the confidence intervals around the means calculated through a bootstrap procedure (see materials and methods). Asterisks indicate significant difference: *P < 0.05, ***P < 0.001, ****P < 0.0001.