TABLE 1.

Characteristics of spatial sensitivity and temporal firing patterns in the Idle condition in all three cortical fields

		Firing pattern	Spatial tuning
A1	56 %	Onset with little or no long-latency response	Broad in Idle condition, sharpening during behavioral tasks
	33 %	Complex	Sharper than onset units
	11 %	Offset or suppression	Broad
DZ	54 %	Onset with little or no long-latency response	About half broad or lateral best areas, half sharp with best areas near frontal midline
	41 %	Complex	Onset portion broad or tuned to frontal midline. Long-latency portion tuned to frontal midline
	5 %	Offset or suppression	Broad
PAF	30 %	Onset with little or no long-latency response	Mostly broad
	16 %	Complex	Onset with irregular long latency responses. Relatively broad tuning
	31 %	Complex	Onset with consistent long latency responses. Relatively sharp tuning; widely distributed best areas
	24 %	Offset or suppression	2/3 spatially tuned with widely distributed best areas; 1/3 broadly tuned