Table 1. Characteristics of Studied Neurons

Data are presented as mean ± SD.

* Number of units with convergent excitatory cutaneous receptive of the Class 2 (excited by both noxious and nonnoxious stimuli) or Class 3 (excited only by noxious stimuli) types.

† Measured before any drug administration.

‡ Difference between the total number of action potentials during the colorectal distension period (20 s, 80 mmHg) and the calculated spontaneous activity for the same period measured as counts (cts).