Figure 7.

Neuron in PA that encoded whether the red or blue stimulus had been farther from the reference. During the S2 period, this cell was selective for blue-farther trials only when S2 appeared upward from the reference point (B) but not downward (A). During the C&A period, the cell preferred the blue-farther trials regardless of whether the blue stimulus or S2 appeared up (B) and down (A) from the reference. (C) On error trials, the cell preferred trials with closer blue stimuli, which accorded with the monkey’s erroneous choice of the blue stimulus, even though the red stimulus had been farther from the reference.