Table 1.

PSP parameters

	Marked (close stimulation)		Control (close stimulation)		Marked (distant stimulation)
	CB stimulation	NCB stimulation	CM stimulation	NCM stimulation	CB stimulation	NCB stimulation
Latency (msec)	2.67  ± 0.13	2.63  ± 0.56	2.4  ± 0.11	2.4  ± 0.15	4.26  ± 0.171-e	4.32  ± 0.191-e
Pkmax(mV)	21.46  ± 2.711-a	26.62  ± 2.51	24.12  ± 1.94	24.56  ± 1.81	14.66  ± 1.69d, h	16.95  ± 1.511-e
I–O τ (μA)	83.7  ± 5.31-c	74.7  ± 5.7	87.0  ± 6.3	88.9  ± 5.1	150.2  ± 8.01-e	136.7  ± 9.71-e
t1/2 low(msec)	18.18  ± 2.33	15.42  ± 1.61	15.01  ± 1.22	14.85  ± 1.18	39.34  ± 6.251-e	33.91  ± 3.361-e
t1/2 high(msec)	14.26  ± 2.61-1002	9.29  ± 1.53	7.71  ± 0.85	7.68  ± .8	22.59  ± 3.231-h	25.59  ± 3.961-e
h/l ratio	0.75  ± 0.091-c	0.59  ± 0.07	0.52  ± 0.04	0.55  ± 0.06	0.63  ± 0.1	0.73  ± 0.09
Threshold (μA)	20.3  ± 3.51-1004	14.5  ± 3.0	25.7  ± 4.0	25.9  ± 3.7	40.46  ± 8.41-i	30.46  ± 2.31-i

Close and distant refer to the distance between stimulation and recording site: close was <300 μm and distant was >450 μm.

Parameters from CB and NCB or CM and NCM stimulation were compared using paired Student’s t tests for each category.

Parameters were compared across categories using a factorial ANOVA, followed by post hoc comparisons (Fisher’s protected least-squares difference) between each of the individual categories.

^F1-a Significantly different from corresponding NCB stimulation, p < 0.0001.

F1-1002:  Significantly different from corresponding NCB stimulation, p < 0.005.

^F1-c Significantly different from corresponding NCB stimulation, p < 0.01.

F1-1004:  Significantly different from corresponding NCB stimulation, p < 0.05.

^F1-e Significantly different from marked close or control, p < 0.0001.

F1-1006:  Significantly different from marked close or control, p < 0.005.

F1-1007:  Significantly different from marked close or control, p < 0.01.

^F1-h Significantly different from marked close or control, p < 0.05.

^F1-i Significantly different from marked close,p < 0.005.