Fig. 4

Effects of object placement in shuttle maze test and relationship between hypersensitivity and preference index after SNL surgery. Shuttle maze measurements were performed in normal and SNL rats 2 weeks after surgery for 3 consecutive days (day 1: no object, day 2: object on short route, day 3: object on long route). a Total counts and b preference index with or without the object on the short or long route. Preference index values are presented as the percentage of counts that animals chose the short route over the total counts. *p < 0.01 vs no object. c The relationship between withdrawal thresholds in the hind paw ipsilateral to nerve injury and preference index values with the object on the short route in normal and SNL rats 2 weeks after surgery