The effects of walking training onset on motor evoked potentials after acute spinal cord injury. (20th November 2020)

• Record Type: Journal Article
• Authors: Zhao, Bolun; Zhou, Xiaohua; Liu, Changhong; Wu, Suqian; An, Libin
• Is Part Of: Neuroscience letters. Volume 739(2020)
• Publication Date: 2020-11-20
• Subjects: Walking training -- Body weight supported treadmill training -- Spinal cord injury -- Motor function -- Transcranial electrical motor evoked potentials; Neurology -- Periodicals; Neurology -- Periodicals; Research -- Periodicals; Neurologie -- Périodiques; Neuroanatomie -- Périodiques; Neuropharmacologie -- Périodiques; Neurophysiologie -- Périodiques; Neurology; Periodicals; Electronic journals; 617.48
• DOI: 10.1016/j.neulet.2020.135338
• Languages: English
• ISSNs: 0304-3940

Abstract

Highlights: The tceMEPs can be used to predict the rehabilitation effect of SCI. The latency and amplitude of tceMEPs have strong correlation with the results of motor function evaluation. The latency and amplitude of tceMEPs can predict the motor function changing ahead of BBB score. Abstract: Aim: The purposes of this study were to explore the optimal time for starting walking training in the first month after spinal cord injury (SCI) in rats and to discuss the relationship between changes in motor function and transcranial electrical motor evoked potentials (tceMEPs). Methods: Four groups of rats with SCI (BSWTT-3, 7, 14, 12) performed body-weight-supported treadmill training (BWSTT) for three weeks beginning at 3, 7, 14, and 21 days after SCI, respectively. The Basso, Beattie, and Bresnahan (BBB) score and tceMEPs were assessed weekly. Weekly repeated measures and multiple comparisons between groups were performed to identify differences in motor function and tceMEPs. Correlation analysis was performed to clarify the relationship between BBB scores and tceMEPs over time. Results: Although there was no significant difference between the BWSTT-14 group and the other three BWSTT groups at the end of the experiment in terms of BBB scores and the latency of tceMEPs, the BWSTT-14 group obtained the best trends in improvement of BBB scores and the latencies and amplitudes of tceMEPs over time. The BBB scores of rats with SCI were strongly negatively correlated with tceMEPs latency. The BBB scores of rats with SCI, except for the rats in the BWSTT-3 group, were strongly positively correlated with the tceMEPs amplitude. Conclusions: The preliminary conclusion was that based on a rat model, 14 days after SCI was the optimal time for starting BWSTT. tceMEPs were an objective indicator of spinal cord nerve function, which was strongly correlated with motor function recovery. However, one limitation of this study was that the rats in the Sham group did not undergo BWSTT, which made the training itself a confounding factor for the results.