Table 1.

Comparison of characteristics of WDR neurones in carrageenan versus saline-treated rats

	Saline-treated (n = 15)	Carrageenan-treated (n = 38)	% Change vs saline-treated
Depth (μm)	677 ± 31	747 ± 21	NA
Threshold (mA)
Aβ	0.14 ± 0.01	0.19 ± 0.01##	130
C	1.47 ± 0.08	1.81 ± 0.10*	124
Latency (ms)
Aβ	7.6 ± 0.79	7.3 ± 0.40	96
C	182.3 ± 8.76	191.0 ± 8.50	105
Electrically evoked responses (number of APs)
Aβa	121 ± 10	126 ± 8	104
Aβb	143 ± 10	145 ± 8	101
Aδb	91 ± 16	148 ± 17##	163
Cb	431 ± 49	497 ± 41	114
PDb	352 ± 49	381 ± 37	106
Inputb	271 ± 51	368 ± 60	136
WUb	505 ± 60	502 ± 46	100

Characteristics of spinal WDR neurones recorded at approximately 30 h following intraplantar injection of 2 % λ-carrageenan or saline

*p < 0.05 unpaired t test, ^## p < 0.01 Mann-Whitney U test

APs action potentials, NA not applicable

^aResponses electrically evoked by 3× Aβ-fibre threshold

^bResponses electrically evoked by 3× C-fibre threshold