Overlap of direction units and CPUs with ramp-up and ramp-down populations.

This table shows the number (percentage) of units classified as CPU and directional units that also showed ramp-up or ramp-down behavior preceding the signal. The first row reports the number of units across the entire population that have ramp up or ramp down behavior, defined as a significant (p<0.05) increase (“ramp-up”) or decrease (“ramp-down”) in firing rate in the 250ms preceding the signal, as compared with a 250ms baseline period 2 seconds prior to the signal. The second and third rows report the percent of CPU and directional units that show this behavior. Standard errors (SE) reflect variability over trial sub-sampling (see Methods); the first row shows no SEs because no trial sub-sampling was employed to identify the upwards and downwards pre-signal firing rate modulations.
Overlap of direction units and CPUs with ramp-up and ramp-down populations.