Movement-direction- and perception-related activity.

For each data set, the CPU (Candidate Perceptual Unit) column shows the number (and percentage) of units in each area whose firing in a one-second post-stimulus window significantly differentiated hit from CR trials. The Direction column shows how many (what percentage) of the CPUs also significantly discriminated FA from miss trials, as well as signaling direction consistently across trials types, using matched numbers of trials in choice probability calculations for both trial-type pairs. The responses of these “directional” units were consistent with purely movement-related activity. Means and SEs were calculated using the variability across 19 sessions and 20 matched trial subsamples (see Methods). CPUs whose responses were not consistent with signaling movement direction were considered to be Putative Perceptual Units; these are tallied in the PPU column.
Movement-direction- and perception-related activity.