Effect of diffuse brain injury on the electrophysiologic properties of the axons in the corpus callosum. (A-F) Graphs representing duration (A, B), conduction velocity (C, D) and refractoriness (E, F) of the N1 (A, C, E) and N2 components (B, D, F). Filled (sham-injured) and open (brain-injured) bars represent mean values; error bars represent SDs. All p values are significant compared to their respective sham-injured animals. *, p < 0.05; **, p < 0.005; #, p < 0.01; ##, p < 0.001; ###, p < 0.0001.