Figure 1.

Tail flick latency (TFL) of mice receiving water or sucrose solution (32%) for 12 days. Antinociception was recorded on the 12th day of treatment and expressed in seconds. Ten recordings were obtained for each animal at 0, 5, 15, 25, 35, 45, 55, 65, 75, and 90 min. Each point is the mean ± standard error (SE) of 10 animals. The difference between water and sucrose-treated groups is significant at ***P< 0.001