Fig. 6. Amplitude and latency of recovered somatosensory evoked potentials (SSEPs) in PEG-treated animals. The peak normalized amplitude of the early-arriving SSEP is plotted for all time points together with the mean latency (100 % represents the pre-injury value). Note that the mean magnitude of the SSEP is approximately 50 % of its pre-injury level, while the latency declines incrementally. The latency at 1 month was statistically significantly reduced compared with day 1 measurements. Values are means + S.E.M. Measurements from 13 animals are shown for all points except at 2 weeks, where nine animals were used for recordings.