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Rohel A, Desmons M, Leonard G, Desgagnés A, da Silva R, Simoneau M, Mercier C, Massé-Alarie H. The influence of experimental low back pain on neural networks involved in the control of lumbar erector spinae muscles. J Neurophysiol 2022; 127:1593-1605. [PMID: 35608262 DOI: 10.1152/jn.00030.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Low back pain (LBP) often modifies spine motor control, but the neural origin of these motor control changes remains largely unexplored. This study aimed to determine the impact of experimental low back pain on the excitability of cortical, subcortical, and spinal networks involved in the control of back muscles. METHOD Thirty healthy subjects were recruited and allocated to Pain (capsaicin and heat) or Control (heat) groups. Corticospinal excitability (motor-evoked potential-MEP) and intracortical networks were assessed by single- and paired-pulse transcranial magnetic stimulation, respectively. Electrical vestibular stimulation was applied to assess vestibulospinal excitability (vestibular MEP-VMEP), and the stretch reflex for excitability of the spinal or supraspinal loop (R1 and R2, respectively). Evoked back motor responses were measured before, during and after pain induction. Nonparametric rank-based ANOVA determined if pain modulated motor neural networks. RESULTS A decrease of R1 amplitude was present after the pain disappearance (p=0.01) whereas an increase was observed in the control group (p=0.03) compared to the R1 amplitude measured at pre-pain and pre-heat period, respectively (Group x Time interaction - p<0.001). No difference in MEP and VMEP amplitude was present during and after pain (p>0.05). CONCLUSION During experimental LBP, no change in cortical, subcortical, or spinal networks was observed. After pain disappearance, the reduction of the R1 amplitude without modification of MEP and VMEP amplitude suggest a reduction in spinal excitability potentially combined with an increase in descending drives. The absence of effect during pain needs to be further explored.
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Affiliation(s)
- Antoine Rohel
- Cirris research centre, Centre intégré universitaire de santé et services sociaux (CIUSSS) de la Capitale-Nationale, Quebec City, Canada.,Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Mikaël Desmons
- Cirris research centre, Centre intégré universitaire de santé et services sociaux (CIUSSS) de la Capitale-Nationale, Quebec City, Canada.,Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Guillaume Leonard
- Research Center on Aging, CIUSSS de l'Estrie - CHUS, Sherbrooke, Canada
| | - Amélie Desgagnés
- Cirris research centre, Centre intégré universitaire de santé et services sociaux (CIUSSS) de la Capitale-Nationale, Quebec City, Canada.,Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Rubens da Silva
- BioNR Research Lab, Université du Québec à Chicoutimi, Chicoutimi, Quebec, Canada
| | - Martin Simoneau
- Cirris research centre, Centre intégré universitaire de santé et services sociaux (CIUSSS) de la Capitale-Nationale, Quebec City, Canada.,Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Catherine Mercier
- Cirris research centre, Centre intégré universitaire de santé et services sociaux (CIUSSS) de la Capitale-Nationale, Quebec City, Canada.,Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Hugo Massé-Alarie
- Cirris research centre, Centre intégré universitaire de santé et services sociaux (CIUSSS) de la Capitale-Nationale, Quebec City, Canada.,Faculty of Medicine, Université Laval, Quebec City, Canada
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Rohel A, Bouffard J, Patricio P, Mavromatis N, Billot M, Roy J, Bouyer L, Mercier C, Masse‐Alarie H. The effect of experimental pain on the excitability of the corticospinal tract in humans: A systematic review and meta‐analysis. Eur J Pain 2021; 25:1209-1226. [DOI: 10.1002/ejp.1746] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 01/19/2021] [Accepted: 02/01/2021] [Indexed: 12/14/2022]
Affiliation(s)
- Antoine Rohel
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
| | - Jason Bouffard
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
| | - Philippe Patricio
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
| | - Nicolas Mavromatis
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
| | - Maxime Billot
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
| | - Jean‐Sébastien Roy
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
- Department of Rehabilitation Faculty of Medicine Laval University Quebec City Quebec Canada
| | - Laurent Bouyer
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
- Department of Rehabilitation Faculty of Medicine Laval University Quebec City Quebec Canada
| | - Catherine Mercier
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
- Department of Rehabilitation Faculty of Medicine Laval University Quebec City Quebec Canada
| | - Hugo Masse‐Alarie
- Center for Interdisciplinary Research in Rehabilitation and Social Integration Quebec City Quebec Canada
- Department of Rehabilitation Faculty of Medicine Laval University Quebec City Quebec Canada
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