Table 1.

Summary of statistics for physiological characteristics shown in Figure 6A

	Response duration (ms)	Peak response latency (ms)	RF diameter (μm)	Peak firing rate (spikes/s)	Nonlinearity index	Biphasic index
ON (N = 238)
Mean	256	208	148	36	4.5	0.61
Median	231	206	141	28	2.6	0.54
SD	126	34	41	27	5.6	0.41
Range	90–505	148–291	100–229	3–89	−0.2–15.5	0.32–0.91
OFF (N = 121)
Mean	210	190	137	39	5.9	0.76
Median	185	157	134	35	4.5	0.73
SD	120	35	27	22	6.6	0.32
Range	85–472	143–235	101–196	11–84	−0.7–18.6	0.40–1.10
	***	***	**		*	***

For each parameter, the table contains the mean, median, SD, and 90th percentile range (5 to 95%) for ON (top) and OFF (middle) cells. For most parameters, there is extensive overlap in the distribution of values among individual ON and OFF cells, but the population mean values differ significantly for all parameters except peak firing rate (bottom).

*p < 0.05;

**p < 0.01;

***p < 0.001 (unpaired t test, two tailed).