Locomotor activity of rats following SCI. The degree of motor incapability was assessed every 2 days during 28 days after SCI, following criteria established by Basso, Beattie, and Bresnahan.19 *P < 0.05 in Mann-Whitney U test, comparing SCI and sham-operated groups. Data are represented as mean ± SEM; n = 8–10/group. SCI, spinal cord injury; SEM, standard error of mean.