Fig. 10.

Plot showing the advantage of A1 neurons' ability to discriminate AM compared with ML. For increasing units this is calculated by subtracting ML mean ROCa from A1 ROCa (A1 − ML). Therefore higher values mean that A1 neurons can better discriminate AM than ML neurons. For decreasing units this is calculated by subtracting A1 mean ROCa from ML ROCa (ML − A1). This is required because for decreasing units lower ROCas correspond to better discrimination ability. This was done for both MUs (A) and SUs (B) in the 8 conditions noted in the key. The conditions were created by splitting 3 categories (increasing vs. decreasing, behaving vs. passive, and 1st vs. 2nd half) into the 8 combinations. Filled symbols represent points with significant differences between A1 and ML by a 2-sample t-test (P < 0.05); open symbols represent values not significantly different between A1 and ML.