Fig. 5. Average probability for a hyperalgesia-type response (see text) from needle stimulation. The number of rats is 28 in the control group, 29 in the spinal nerve ligation (SNL) group, and 27 in the sham group. BL = baseline. *= Significant difference between ipsilateral (right) and contralateral (left); R = significant difference from baseline at that time point for right paw. Differences were evaluated by analysis of variance with  post hoc Bonferroni test.  Error bars show 95% confidence intervals.