Fig. 2.
(A) Changes in paw withdrawal latencies before and after daily injections of morphine to male (3, 5, or 10 mg/kg) and female (5 mg/kg) rats. Lidocaine EC50 data for block of A (B) and C (C) waves evoked in sciatic nerves obtained from the rats whose behavioral data are plotted in (A). Each point represents data from a single rat, and the bars are the mean EC50.