Figure 4

Distance traveled. The mean total distance traveled by rats for their time in the activity chamber. Note the marked decline in distance traveled occurring in response to TBI. The improvement produced by the 2-hour delay administration of PEG was statistically significant at 1 day, 4 days, and 1 week post-injury (P ≤ 0.05). The 4-hour delay improvement reached significance at 4 days but showed only a trend towards significance by 1 week postinjury. The 6 hour delayed administration of PEG eliminated any trend towards recovery. Note that in this caseand for all subsequent figures, the precipitous loss in performance produced by TBI was statistically significant. Brackets and asterisks are not used to denote this fact in order to simplify reading of the graph.