Table 1.

Detailed information for the strength and relative latency of FS and SS in different layers^a

	FS index		SS index		Relative latency of FS		Relative latency of SS
	Mean ± SEM	No. of sites	Mean ± SEM	No. of sites	Mean ± SEM (ms)	No. of sites	Mean ± SEM (ms)	No. of sites
L2/3	0.23±0.02	115	0.28±0.01	115	20.51±1.66	82	44.70±1.48	112
L4B	0.46±0.04	29	0.17±0.02	29	18.07±3.00	27	46.32±3.62	25
L4Cα	0.72±0.02	68	0.07±0.01	68	11.35±0.44	68	60.32±6.05	31
L4Cβ	0.47±0.02	57	0.10±0.01	57	21.31±1.30	55	61.03±5.10	31
L5	0.39±0.03	63	0.23±0.02	63	18.25±1.64	55	46.81±2.18	54
L6	0.59±0.03	52	0.12±0.01	52	14.94±1.25	51	58.82±5.73	34

^aThe FS and SS index was defined as the maximum value of mean strength. The latency was defined as the time at which each component first reached 2 × SDs of baseline fluctuations (−20 ms to 10 ms of raw dynamic response). Relative latency was defined as the latency difference between FS and excitation (latency of FS minus latency of excitation) and SS and excitation (latency of SS minus latency of excitation).