H reflex modulation by transcranial magnetic stimulation in spinal cord injury subjects after gait training with electromechanical systems

Spinal Cord
J Benito PenalvaJosep Valls-Sole

Abstract

Prospective longitudinal study. The aim of this study was to examine the effects of transcranial magnetic stimulation (TMS) on the soleus H reflex in patients with spinal cord injury (SCI) before and after locomotion training. Neurorehabilitation hospital in Barcelona, Spain. H reflex was elicited in 29 incomplete patients with SCI at 20, 50 and 80 ms after single vertex TMS, and compared with 13 healthy subjects. Patients were subdivided in two groups according to time since injury (<3 months, 3-12 months), and all received training with electromechanical systems. The H reflex modulation pattern to TMS was reassessed and the results were analyzed as a function of change in the patient clinical score. Healthy subjects showed a significant H reflex facilitation at 20 ms (186.1%) and at 80 ms (190.6%) compared with the control H reflex. In patients, the H reflex facilitation at 20 ms was significantly reduced before training (142.5%, P=0.039) compared with healthy subjects. After training, patients with <3 months exhibited an increase in H reflex facilitation at 20 ms (170.7%, P=0.04), a greater gait velocity (P=0.014) and a positive correlation with the walking index for spinal cord injury (WISCI II) scale (P=0.050), compared wi...Continue Reading

References

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Citations

Jun 10, 2011·Experimental Brain Research·João CostaJosep Valls-Solé
May 31, 2012·Experimental Brain Research·Jessica Guzmán-LópezJosep Valls-Solé
Apr 20, 2013·Physical Medicine and Rehabilitation Clinics of North America·Elizabeth C HardinRonald J Triolo
Apr 29, 2014·Muscle & Nerve·Christopher C MatthewsGeorge F Wittenberg
Sep 19, 2012·Journal of Neurosurgery. Spine·Maxwell BoakyeAndrea C Skelly
Mar 17, 2015·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Noam Y HarelAnn M Spungen
Mar 7, 2014·Journal of Neurophysiology·Maria Knikou, Chaithanya K Mummidisetty

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