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Thermal hyperalgesia induced by tail injection of carrageenan. Results are expressed as effect of carrageenan on tail withdrawal latencies at 42 °C (top), 46 °C (middle) and 50 °C (bottom) observed at different time points. Symbols represent different doses of carrageenan. Each value represents mean ± S.E.M (n=4). * significant difference from the vehicle between 30- and 300-min time points (p<0.05).
