Article (Scientific journals)
Corticospinal excitability as a biomarker of myofascial pain syndrome
Thibaut, Aurore; Zeng, D.; Caumo, W. et al.
2017In PAIN Reports, 2 (3)
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Keywords :
Cortical excitability; Disinhibition; Intracortical facilitation; Intracortical inhibition; Motor cortex; Myofascial pain syndrome; Pain
Abstract :
[en] Introduction: Myofascial pain syndrome (MPS) is a common chronic pain disorder that lacks effective diagnostic criteria. To better understand neurophysiological changes in chronic pain, several trials exploring corticospinal excitability in different populations of patients with chronic pain have been performed. Objectives: In this systematic review, we aimed to investigate the current literature on MPS and intracortical disinhibition, by means of increased intracortical facilitation and decreased intracortical inhibition (ICI). Methods: We performed a search on PubMed to identify clinical trials on MPS and transcranial magnetic stimulation measurements. We then applied the Harford Hill criteria to the identified studies to assess the possible causal relationship between intracortical disinhibition measurements and MPS. Finally, we compared our findings on MPS with other chronic pain conditions. Results: Four studies assessing corticospinal excitability in patients with MPS were found. Although the amount of trials available is limited, all the reported studies indicated an increased intracortical disinhibition in patients with MPS. Importantly, these measurements were also correlated with psychological factors, such as pain catastrophism, or anxiety. However, based on the Harford Hill criteria, we could not assert a strong causal relationship between these markers and MPS. Although intracortical disinhibition has been consistently found in patients having MPS, this lack of cortical inhibition was not only observed in this specific chronic pain syndrome but also in fibromyalgia and neuropathic pain conditions. Conclusion: Intracortical disinhibition seems to be a marker that has been consistently observed in MPS. Future prospective cohort studies could provide new insights in the development of neoplastic and maladaptive changes occurring in chronic pain syndromes and help the development of new therapeutic options. Copyright © 2017 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of The International Association for the Study of Pain.
Disciplines :
Neurology
Author, co-author :
Thibaut, Aurore ;  Université de Liège - ULiège > Consciousness-Coma Science Group
Zeng, D.;  Spaulding Neuromodulation Center, Spaulding Rehabilitation Hospital, Harvard Medical School, 79/96, 13th St, Charlestown, MA 02129, United States, Guangdong Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
Caumo, W.;  Laboratory of Pain and Neuromodulation, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
Liu, J.
Fregni, F.;  Spaulding Neuromodulation Center, Spaulding Rehabilitation Hospital, Harvard Medical School, 79/96, 13th St, Charlestown, MA 02129, United States
Language :
English
Title :
Corticospinal excitability as a biomarker of myofascial pain syndrome
Publication date :
2017
Journal title :
PAIN Reports
eISSN :
2471-2531
Publisher :
Lippincott Williams and Wilkins
Volume :
2
Issue :
3
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Fonds Léon FredericqWallonie-Bruxelles International1R01HD082302-01A1, RO1grant
Available on ORBi :
since 27 December 2020

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