Table 2.

Threshold differences of DR-evoked EPSPs

	GFP–islet cell pairs			GFP–vertical cell pairs
	GFP to islet (n= 3)	Islet to GFP (n= 15)	Reciprocal (n= 6)	Aδ (n= 7)	C (n= 9)	Islet–TrC cell pairs (n= 5)
Ratio	0.84 ± 0.1	0.80 ± 0.04***	0.77 ± 0.06**	3.01 ± 0.50**	0.80 ± 0.06**	0.86 ± 0.05*

Data were obtained from connected cell pairs in which both cells received monosynaptic dorsal root (DR) inputs. Graded DR stimulation was applied to estimate the thresholds of DR-evoked EPSPs. Pulse width was 0.5 ms for C fibres and 0.1 ms for Aδ fibres. Ratio was computed by threshold of GFP cell/threshold of non-GFP cell, or threshold of islet cell/threshold of transient central (TrC) cell. One sample t test was adopted for statistical analysis with the null hypothesis of mean = 1.

^*P < 0.05;

^**P < 0.01;

^***P < 0.001.