Table 1. Axonal propagation velocity.

	Intralaminar SGS		Intralaminar SGI
	Lateral	Medial	Lateral	Medial	Interlaminar
SGS stimulation
Velocity	110.6 ± 10.0	106.7 ± 6.1	110.7 ± 11.7	99.2 ± 13.0	111.4 ± 14.3
R2	0.95 ± 0.01	0.96 ± 0.01	0.90 ± 0.03	0.89 ± 0.02	0.91 ± 0.02
SGI stimulation
Velocity	240.7 ± 15.3	259.6 ± 31.6	72.2 ± 5.0	79.7 ± 8.2	141.1 ± 21.1
R2	0.86 ± 0.02	0.85 ± 0.04	0.93 ± 0.01	0.95 ± 0.01	0.87 ± 0.02

Average velocity of initial-spike propagation was calculated by fitting lines to the maximum latency data of each slice, plotted as distance traveled versus time. The reciprocal of the slope for the fitted line equals the conduction velocity in μm/ms ± SE. Intralaminar plots were divided into lateral and medial directions so that lines could befitted in each direction.