• Lisa Goudman, Ann De Smedt, Frédéric Louis, Virginie Stalmans, Bengt Linderoth, Philippe Rigoard, and Maarten Moens.
• Department of Neurosurgery, Universitair Ziekenhuis Brussel, Jette, Belgium; Center for Neurosciences (C4N), Vrije Universiteit Brussel, Jette, Belgium; Pain in Motion International Research Group (PAIN), ... more Department of Physiotherapy, Human Physiology and Anatomy, Vrije Universiteit Brussel, Jette, Belgium; STIMULUS Consortium (reSearch and TeachIng neuroModULation Uz bruSsel), Universitair Ziekenhuis Brussel, Jette, Belgium. less
• Neuromodulation. 2022 Jan 1; 25 (1): 128-136.

ObjectivesIn patients with chronic pain, a relative lower parasympathetic activity is suggested based on heart rate variability measurements. It is hypothesized that spinal cord stimulation (SCS) is able to influence the autonomic nervous system. The aim of this study is to further explore the influence of SCS on the autonomic nervous system by evaluating whether SCS is able to influence skin conductance, blood volume pulse, heart rate, and respiration rate.Materials And MethodsTwenty-eight patients with Failed Back Surgery Syndrome (FBSS), who are being treated with SCS, took part in this multicenter study. Skin conductance and cardiorespiratory parameters (blood volume pulse, heart rate, and respiration rate) were measured during on and off states of SCS. Paired statistics were performed on a 5-min recording segment for all parameters.ResultsSCS significantly decreased back and leg pain intensity scores in patients with FBSS. Skin conductance level and blood volume pulse were not altered between on and off states of SCS. Heart rate and respiration rate significantly decreased when SCS was activated.ConclusionsParameters that are regulated by the sympathetic nervous system were not significantly different between SCS on and off states, leading to the hypothesis that SCS is capable of restoring the dysregulation of the autonomic nervous system by primarily increasing the activity of the parasympathetic system in patients with FBSS.Copyright © 2021 International Neuromodulation Society. Published by Elsevier Inc. All rights reserved.

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