Table 1.

Electrophysiological properties of cold-sensitive and cold-insensitive adult rat cultured nodose neurons

	Cold sensitive (n = 7)	Cold insensitive (n = 8)	p value
Input resistance	340 ± 121 MΩ	317 ± 79 M	NS
Resting membrane potential	−56 ± 3 mV	−56 ± 3 mV	NS
Firing threshold	−42 ± 1 mV	−43 ± 1 mV	NS
Rheobase	52 ± 14 pA	58 ± 13 pA	NS
Action potential amplitude	98 ± 5 mV	101 ± 4 mV	NS
Action potential duration	1.00 ± 0.09 ms	1.19 ± 0.04 ms	NS

Neurons were recorded in the perforated-patch current-clamp configuration. Input resistance was measured from the slope of peak voltage response to a series of negative current steps. Spike duration was measured at half amplitude.