Table 2.

Comparison of peak response of superficial dorsal horn neurons to warm stimuli

	Sensitive		Insensitive		Sensitive		Insensitive
	Histamine		Histamine		5-HT		5-HT
	Sensitive	Insensitive	Sensitive	Insensitive	Sensitive	Insensitive	Sensitive	Insensitive
N	4	2	11	12	7	5	5	31
Pre	7.5 ± 2.3	2.5 ± 0.5	1.1 ± 0.4	0.7 ± 0.6	7.6 ± 1.7	14.6 ± 4.2	2.0 ± 0.6	1.3 ± 0.4
Post 15 min	4.0 ± 1.6	7.5 ± 6.5	2.2 ± 0.6	0.9 ± 0.5	20.3 ± 5.9*	18.0 ± 13.4	20.0 ± 7.7*	0.5 ± 0.2

Data represent average ± SE peak responses to warm stimuli (impulses).

^*Significantly different from preinjection data (P < 0.05, paired t-test).