Figure 3.

P1-N1 and N1-P2 amplitudes recorded by somatosensory evoked potentials on days 2 and 7 after SCI (n = 5) or SCI + ES (n = 10).

For recording somatosensory evoked potentials, the stimulating electrode was positioned at the tibial nerve of a hind paw of the rat. The active recording electrodes were placed at 3 mm posterior to bregma and at 2 mm lateral to the sagittal suture, while the reference electrodes were positioned at 6 mm below bregma and lateral to the sagittal suture. All values are represented as the mean ± SE. There were significant differences in the P1-N1 amplitude on days 2 and 7 and in the N1-P2 amplitude on day 7 between SCI and SCI + ES groups (*P < 0.05). Two-sample Student's t-test was used. ES: Electrical stimulation; Lt: left; Rt: right; SCI: spinal cord injury.