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Arribas-Romano A, Fernández-Carnero J, Beltran-Alacreu H, Alguacil-Diego IM, Cuenca-Zaldívar JN, Rodríguez-Lagos L, Runge N, Mercado F. Conditioned Pain Modulation and Temporal Summation of Pain in Patients With Traumatic and Non-Specific Neck Pain: A Systematic Review and Meta-Analysis. J Pain 2024; 25:312-330. [PMID: 37734462 DOI: 10.1016/j.jpain.2023.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 08/25/2023] [Accepted: 09/02/2023] [Indexed: 09/23/2023]
Abstract
In patients with neck pain, it is unclear whether pain inhibition and facilitation endogenous pain mechanisms are altered. This systematic review and meta-analysis aimed to improve their understanding by assessing conditioned pain modulation (CPM) and temporal summation of pain (TSP) in patients with neck pain associated with whiplash-associated disorders (WAD) or of a nonspecific neck pain (NSNP) nature compared to pain-free controls. Very low certainty evidence suggests: impaired CPM when assessed remotely in chronic WAD patients (n = 7, 230 patients and 204 controls, standardized mean differences (SMD) = -.47 [-.89 to -.04]; P = .04) but not locally (n = 6, 155 patients and 150 controls; SMD = -.34 [-.68 to .01]; P = .05), impaired CPM in chronic NSNP patients when assessed locally (n = 5, 223 patients and 162 controls; SMD = -.55 [-1.04 to -.06]; P = .04) but not remotely (n = 3, 72 patients and 66 controls; SMD = -.33 [-.92 to .25]; P = .13), TSP not facilitated in either chronic WAD (local TSP: n = 4, 90 patients and 87 controls; SMD = .68 [-.62 to 1.99]) (remote TSP: n = 8, 254 patients and 214 controls; SMD = .18 [-.12 to .48]) or chronic NSNP (local TSP: n = 2, 139 patients and 92 controls; SMD = .21 [-1.00 to 1.41]), (remote TSP: n = 3; 91 patients and 352 controls; SMD = .60 [-1.33 to 2.52]). The evidence is very uncertain whether CPM is impaired and TSP facilitated in patients with WAD and NSNP. PERSPECTIVE: This review and meta-analysis present the current evidence on CPM and TSP in patients with WAD and NSNP. Standardization of measurement methodology is needed to draw clear conclusions. Subsequently, future studies should investigate the clinical relevance of these measurements as prognostic variables or predictors of treatment success.
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Affiliation(s)
- Alberto Arribas-Romano
- Escuela Internacional de Doctorado, Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Universidad Rey Juan Carlos, Alcorcón, Spain; Cognitive Neuroscience, Pain, and Rehabilitation Research Group (NECODOR), Faculty of Health Sciences, Rey Juan Carlos University, Madrid, Spain; Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Rey Juan Carlos University, Madrid, Spain
| | - Josué Fernández-Carnero
- Cognitive Neuroscience, Pain, and Rehabilitation Research Group (NECODOR), Faculty of Health Sciences, Rey Juan Carlos University, Madrid, Spain; Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Rey Juan Carlos University, Madrid, Spain; Motion in Brains Research Group, Institute of Neuroscience and Sciences of the Movement (INCIMOV), Centro Superior de Estudios Universitarios La Salle, Madrid, Spain; La Paz Hospital Institute for Health Research, IdiPAZ, Madrid, Spain; Musculoskeletal Pain and Motor Control Research Group, Faculty of Sport Sciences, Universidad Europea de Madrid, Madrid, Spain
| | - Hector Beltran-Alacreu
- Toledo Physiotherapy Research Group (GIFTO), Faculty of Physiotherapy and Nursing of Toledo, Universidad de Castilla-La Mancha, Toledo, Spain; CranioSPain Research Group, Centro Superior de Estudios Universitarios La Salle, Madrid, Spain
| | - Isabel M Alguacil-Diego
- Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Rey Juan Carlos University, Madrid, Spain; Motion Analysis, Ergonomics, Biomechanics and Motor Control Laboratory (LAMBECOM), Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Faculty of Health Sciences, Rey Juan Carlos University, Madrid, Spain
| | - Juan Nicolás Cuenca-Zaldívar
- Research Group in Nursing and Health Care, Puerta de Hierro Health Research Institute, Segovia de Arana (IDIPHISA), Madrid, Spain; Primary Health Center "El Abajon", Las Rozas de Madrid, Spain; Grupo de Investigación en Fisioterapia y Dolor, Departamento de Fisioterapia, Facultad de Enfermería y Fisioterapia, Universidad de Alcalá, Alcalá de Henares, Spain
| | - Leonardo Rodríguez-Lagos
- Escuela Internacional de Doctorado, Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Universidad Rey Juan Carlos, Alcorcón, Spain; Cognitive Neuroscience, Pain, and Rehabilitation Research Group (NECODOR), Faculty of Health Sciences, Rey Juan Carlos University, Madrid, Spain
| | - Nils Runge
- Pain in Motion Research Group (PAIN), Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Belgium; Musculoskeletal Rehabilitation Research Group, Department of Rehabilitation Sciences, Faculty of Movement and Rehabilitation Sciences, KU Leuven, Belgium
| | - Francisco Mercado
- Cognitive Neuroscience, Pain, and Rehabilitation Research Group (NECODOR), Faculty of Health Sciences, Rey Juan Carlos University, Madrid, Spain; Department of Psychology, Faculty of Health Sciences, Universidad Rey Juan Carlos, Madrid, Spain
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Bellosta-López P, Doménech-García V, Ortiz-Lucas M, Lluch-Girbés E, Herrero P, Sterling M, Christensen SWM. Longitudinal Changes and Associations Between Quantitative Sensory Testing and Psychological Factors in Whiplash-Associated Disorders: A Systematic Review and Meta-Analyses-Based Data Synthesis. J Pain 2024; 25:12-30. [PMID: 37517451 DOI: 10.1016/j.jpain.2023.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 07/17/2023] [Accepted: 07/19/2023] [Indexed: 08/01/2023]
Abstract
Whiplash-associated disorders (WAD) represent a multifactorial condition often accompanied by altered nociceptive processing and psychological factors. This systematic review on acute and chronic WAD aimed to investigate the relationship between quantitative sensory testing (QST) and psychological factors and quantify whether their trajectories over time follow a similar pattern to disability levels. Eight databases were searched until October 2022. When 2 prospective studies examined the same QST or psychological variable, data synthesis was performed with random-effects meta-analysis by pooling within-group standardized mean differences from baseline to 3-, 6-, and 12-month follow-ups. From 5,754 studies, 49 comprising 3,825 WAD participants were eligible for the review and 14 for the data synthesis. Altered nociceptive processing in acute and chronic WAD, alongside worse scores on psychological factors, were identified. However, correlations between QST and psychological factors were heterogeneous and inconsistent. Furthermore, disability levels, some QST measures, and psychological factors followed general positive improvement over time, although there were differences in magnitude and temporal changes. These results may indicate that altered psychological factors and increased local pain sensitivity could play an important role in both acute and chronic WAD, although this does not exclude the potential influence of factors not explored in this review. PERSPECTIVE: Acute WAD show improvements in levels of disability and psychological factors before significant improvements in nociceptive processing are evident. Facilitated nociceptive processing might not be as important as psychological factors in chronic WAD-related disability, which indicates that chronic and acute WAD should not be considered the same entity although there are similarities. Nonetheless, pressure pain thresholds in the neck might be the most appropriate measure to monitor WAD progression.
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Affiliation(s)
- Pablo Bellosta-López
- Universidad San Jorge, Campus Universitario, Autov. A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - Víctor Doménech-García
- Universidad San Jorge, Campus Universitario, Autov. A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - María Ortiz-Lucas
- Universidad San Jorge, Campus Universitario, Autov. A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - Enrique Lluch-Girbés
- Physiotherapy in Motion, Multi-Specialty Research Group (PTinMOTION), Department of Physical Therapy, University of Valencia, Valencia, Spain
| | - Pablo Herrero
- iHealthy Research Group. IIS Aragon/University of Zaragoza. Department of Physiatry and Nursing. Faculty of Health Sciences, Zaragoza, Spain
| | - Michele Sterling
- Recover Injury Research Centre, The University of Queensland, Herston, Australia; Centre of Research Excellence, Better Health Outcomes for Compensable Injury, The University of Queensland, Herston, Australia
| | - Steffan W M Christensen
- Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark; Department of Physiotherapy, University College of Northern Denmark, Aalborg, Denmark
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Liebert A, Capon W, Pang V, Vila D, Bicknell B, McLachlan C, Kiat H. Photophysical Mechanisms of Photobiomodulation Therapy as Precision Medicine. Biomedicines 2023; 11:biomedicines11020237. [PMID: 36830774 PMCID: PMC9953702 DOI: 10.3390/biomedicines11020237] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 01/19/2023] Open
Abstract
Despite a significant focus on the photochemical and photoelectrical mechanisms underlying photobiomodulation (PBM), its complex functions are yet to be fully elucidated. To date, there has been limited attention to the photophysical aspects of PBM. One effect of photobiomodulation relates to the non-visual phototransduction pathway, which involves mechanotransduction and modulation to cytoskeletal structures, biophotonic signaling, and micro-oscillatory cellular interactions. Herein, we propose a number of mechanisms of PBM that do not depend on cytochrome c oxidase. These include the photophysical aspects of PBM and the interactions with biophotons and mechanotransductive processes. These hypotheses are contingent on the effect of light on ion channels and the cytoskeleton, the production of biophotons, and the properties of light and biological molecules. Specifically, the processes we review are supported by the resonant recognition model (RRM). This previous research demonstrated that protein micro-oscillations act as a signature of their function that can be activated by resonant wavelengths of light. We extend this work by exploring the local oscillatory interactions of proteins and light because they may affect global body circuits and could explain the observed effect of PBM on neuro-cortical electroencephalogram (EEG) oscillations. In particular, since dysrhythmic gamma oscillations are associated with neurodegenerative diseases and pain syndromes, including migraine with aura and fibromyalgia, we suggest that transcranial PBM should target diseases where patients are affected by impaired neural oscillations and aberrant brain wave patterns. This review also highlights examples of disorders potentially treatable with precise wavelengths of light by mimicking protein activity in other tissues, such as the liver, with, for example, Crigler-Najjar syndrome and conditions involving the dysregulation of the cytoskeleton. PBM as a novel therapeutic modality may thus behave as "precision medicine" for the treatment of various neurological diseases and other morbidities. The perspectives presented herein offer a new understanding of the photophysical effects of PBM, which is important when considering the relevance of PBM therapy (PBMt) in clinical applications, including the treatment of diseases and the optimization of health outcomes and performance.
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Affiliation(s)
- Ann Liebert
- Faculty of Medicine and Health, University of Sydney, Sydney 2006, Australia
- Adventist Hospital Group, Wahroonga 2076, Australia
- NICM Health Research Institute, Western Sydney University, Westmead 2145, Australia
- Correspondence:
| | - William Capon
- Faculty of Medicine and Health, University of Sydney, Sydney 2006, Australia
| | - Vincent Pang
- NICM Health Research Institute, Western Sydney University, Westmead 2145, Australia
| | - Damien Vila
- Faculty of Medicine of Montpellier-Nîmes, University of Montpellier, 34090 Montpellier, France
| | - Brian Bicknell
- NICM Health Research Institute, Western Sydney University, Westmead 2145, Australia
| | - Craig McLachlan
- Faculty of Health, Torrens University, Adelaide 5000, Australia
| | - Hosen Kiat
- NICM Health Research Institute, Western Sydney University, Westmead 2145, Australia
- Faculty of Health, Torrens University, Adelaide 5000, Australia
- Cardiac Health Institute, Sydney 2121, Australia
- ANU College of Health and Medicine, Australian National University, Canberra 2600, Australia
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Macquarie Park 2109, Australia
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Lütolf R, Rosner J, Curt A, Hubli M. Indicators of central sensitization in chronic neuropathic pain after spinal cord injury. Eur J Pain 2022; 26:2162-2175. [PMID: 36008094 PMCID: PMC9826442 DOI: 10.1002/ejp.2028] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 08/01/2022] [Accepted: 08/20/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND Central sensitization is considered a key mechanism underlying neuropathic pain (NP) after spinal cord injury (SCI). METHODS Two novel proxies for central sensitization were investigated in thoracic SCI subjects with (SCI-NP) and without NP (SCI-nonNP) compared to healthy controls (HC). Specifically, temporal summation of pain (TSP) was investigated by examining pain ratings during a 2-min tonic heat application to the volar forearm. Additionally, palmar heat-induced sympathetic skin responses (SSR) were recorded in order to reveal changes in pain-autonomic interaction above the lesion level. Pain extent was assessed as the percentage of the body area and the number of body regions being affected by NP. RESULTS Enhanced TSP was observed in SCI-NP (+66%) compared to SCI-nonNP (-75%, p = 0.009) and HC (-59%, p = 0.021). In contrast, no group differences were found (p = 0.685) for SSR habituation. However, pain extent in SCI-NP was positively correlated with deficient SSR habituation (body area: r = 0.561, p = 0.024; body regions: r = 0.564, p = 0.023). CONCLUSIONS These results support the value of TSP and heat-induced SSRs as proxies for central sensitization in widespread neuropathic pain syndromes after SCI. Measures of pain-autonomic interaction emerged as a promising tool for the objective investigation of sensitized neuronal states in chronic pain conditions. SIGNIFICANCE We present two surrogate readouts for central sensitization in neuropathic pain following SCI. On the one hand, temporal summation of tonic heat pain is enhanced in subjects with neuropathic pain. On the other hand, pain-autonomic interaction reveals potential advanced measures in chronic pain, as subjects with a high extent of neuropathic pain showed diminished habituation of pain-induced sympathetic measures. A possible implication for clinical practice is constituted by an improved assessment of neuronal hyperexcitability potentially enabling mechanism-based treatment.
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Affiliation(s)
- Robin Lütolf
- Spinal Cord Injury CenterBalgrist University Hospital, University of ZurichZurichSwitzerland
| | - Jan Rosner
- Spinal Cord Injury CenterBalgrist University Hospital, University of ZurichZurichSwitzerland,Department of NeurologyUniversity Hospital Bern, Inselspital, University of BernBernSwitzerland
| | - Armin Curt
- Spinal Cord Injury CenterBalgrist University Hospital, University of ZurichZurichSwitzerland
| | - Michèle Hubli
- Spinal Cord Injury CenterBalgrist University Hospital, University of ZurichZurichSwitzerland
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Carrasco-Uribarren A, Pardos-Aguilella P, Pérez-Guillén S, López-de-Celis C, Rodríguez-Sanz J, Cabanillas-Barea S. Combination of Two Manipulative Techniques for the Treatment of Cervicogenic Dizziness: A Randomized Controlled Trial. Life (Basel) 2022; 12. [PMID: 35888111 DOI: 10.3390/life12071023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 06/30/2022] [Accepted: 07/07/2022] [Indexed: 12/23/2022] Open
Abstract
Cervicogenic dizziness is clinically associated with upper cervical spine dysfunctions. It seems that manual therapy decreases the intensity of dizziness in these subjects, but what happens to pain measured by pressure pain threshold (PPT) has not been studied. Purpose: analyze the short-term effects of combination two manipulation techniques protocol in worst dizziness intensity (wVAS), dizziness and cervical disability, upper cervical spine mobility and mechanosensivity of cervical tissue. Methods: Assessor-blinded randomized controlled trial was developed. A total of 40 patients with cervicogenic dizziness were randomly divided into two groups. The experimental group received three treatments consisting of a functional massage and a manipulation technique, and compared with a control group. The wVAS, dizziness handicap inventory (DHI), neck disability index (NDI), UCS mobility, and PPTs were measured. Measurements were made at the baseline, first follow-up 48 h after intervention and second follow-up 1 month after the intervention. Results: at second follow-up wVAS (p < 0.001), NDI (p < 0.001), DHI (p < 0.001), and upper right trapezius (p < 0.022) and right suboccipital (p < 0.043) PPTs showed a difference between groups in favor of the experimental group. Conclusions: apparently, the proposed intervention protocol decreases the intensity of dizziness and the mechanosensitivity of the cervical tissue and improves the feeling of disability due to neck pain and dizziness.
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Ortego G, Lluch E, Herrero P, Boudreau SA, Doménech-García V. Profiling and Association over Time between Disability and Pain Features in Patients with Chronic Nonspecific Neck Pain: A Longitudinal Study. J Clin Med 2022; 11:jcm11051346. [PMID: 35268437 PMCID: PMC8911229 DOI: 10.3390/jcm11051346] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/17/2022] [Accepted: 02/25/2022] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES To longitudinally investigate the relationships between neck/arm disability and pain profile measures in individuals with chronic nonspecific neck pain (NSNP) at baseline, one month, and six months after a standardized physiotherapy intervention. A secondary aim was to compare pain sensitivity of individuals with chronic NSNP at baseline to healthy controls. METHODS A total of sixty-eight individuals with chronic NSNP and healthy controls were recruited. Neck disability index (NDI), the 11-item disabilities of the arm, shoulder, and hand questionnaire (QuickDASH), temporal summation (TS), pressure pain thresholds (PPTs), pain intensity and pain extent were assessed in individuals with chronic NSNP. For the cross-sectional assessment, TS and PPTs were compared to healthy controls. RESULTS After following a standardized physiotherapy intervention, local and distal PPTs to the neck region decreased at one and six month follow-ups, respectively. Pain extent decreased at one and six months. Furthermore, a positive correlation between neck/arm disability and pain intensity was found at baseline, whereas moderate positive correlations (e.g., between NDI and pain extent) at baseline, one and six month follow-ups and negative correlations at six months (e.g., between arm disability and PPTs) were found. DISCUSSION Overall, these findings indicate that pain sensitivity can worsen following treatment despite reduced pain extent and unchanged neck disability and pain intensity scores over a six-month period in individuals with chronic NSNP.
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Affiliation(s)
- Gorka Ortego
- Faculty of Health Sciences, Universidad San Jorge, Campus Universitario, Autov. A23 km 299, 50830 Villanueva de Gállego, Zaragoza, Spain; (G.O.); (V.D.-G.)
| | - Enrique Lluch
- Department of Physiotherapy, University of Valencia, 46010 Valencia, Spain;
- Physiotherapy in Motion, Multi-Speciality Research Group (PTinMOTION), Department of Physiotherapy, University of Valencia, 46010 Valencia, Spain
- Brussels “Pain in Motion” International Research Group, Departments of Human Physiology and Rehabilitation Sciences, Vrije Universiteit Brussels, 1050 Ixelles, Belgium
| | - Pablo Herrero
- Department of Physiatry and Nursing, Faculty of Health Sciences, IIS Aragon, University of Zaragoza, 50009 Zaragoza, Spain
- Correspondence: ; Tel.: +34-646168248
| | - Shellie Ann Boudreau
- Center for Neuroplasticity and Pain (CNAP), SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, 9220 Aalborg, Denmark;
| | - Victor Doménech-García
- Faculty of Health Sciences, Universidad San Jorge, Campus Universitario, Autov. A23 km 299, 50830 Villanueva de Gállego, Zaragoza, Spain; (G.O.); (V.D.-G.)
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Alalawi A, Evans DW, Liew B, Peolsson A, Heneghan N, Rushton A, Peterson G, Barbero M, Falla D. Does Pain Extent Predict Ongoing Pain and Disability in Patients with Chronic Whiplash-Associated Disorders? J Clin Med 2022; 11:jcm11030555. [PMID: 35160006 PMCID: PMC8837121 DOI: 10.3390/jcm11030555] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 12/13/2022] Open
Abstract
This study investigates whether baseline pain extent, extracted from an electronic pain drawing, is an independent predictive factor of pain and disability measured 1 year and 2 years later in people with chronic WAD. Participants completed questionnaires assessing neck pain intensity, disability via the Neck Disability Index (NDI), psychological features, and work ability. Participants also completed electronic pain drawings from which their pain extent was extracted. A two-step modelling approach was undertaken to identify the crude and adjusted association between pain extent and NDI measured at 1-year and 2-year follow-ups. A total of 205 participants were included in the analysis. The univariate analysis showed that pain extent was significantly associated with the NDI score at the 1-year (p = 0.006, 95% CI: 0.159-0.909) and 2-year (p = 0.029, 0.057-0.914) follow-ups. These associations were not maintained when we introduced perceived disability, psychological health, and work ability into the model after 1 year (p = 0.56, 95%CI: -0.28-0.499) and 2 years (p = 0.401, -0.226-0.544). Pain extent, as an independent factor, was significantly associated with perceived pain and disability in patients with chronic WAD for up to 2 years. This association was masked by neck disability, psychological health, and work ability.
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Affiliation(s)
- Ahmed Alalawi
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham B15 1JN, UK; (A.A.); (D.W.E.); (N.H.); (A.R.)
- Physical Therapy Department, College of Applied Medical Sciences, Umm Al-Qura University, Makkah 24382, Saudi Arabia
| | - David W. Evans
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham B15 1JN, UK; (A.A.); (D.W.E.); (N.H.); (A.R.)
| | - Bernard Liew
- School of Sport, Rehabilitation and Exercise Sciences, Faculty of Physiotherapy, University of Essex, Colchester CO4 3WA, UK;
| | - Anneli Peolsson
- Department of Medical and Health Sciences, Linköping University, SE-581 83 Linköping, Sweden; (A.P.); (G.P.)
- Occupational and Environmental Medicine Center, Department of Health, Medicine and Caring Sciences, Unit of Clinical Medicine, Linköping University, SE-581 83 Linköping, Sweden
| | - Nicola Heneghan
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham B15 1JN, UK; (A.A.); (D.W.E.); (N.H.); (A.R.)
| | - Alison Rushton
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham B15 1JN, UK; (A.A.); (D.W.E.); (N.H.); (A.R.)
| | - Gunnel Peterson
- Department of Medical and Health Sciences, Linköping University, SE-581 83 Linköping, Sweden; (A.P.); (G.P.)
- Centre for Clinical Research Sörmland, Uppsala University, SE-751 05 Uppsala, Sweden
| | - Marco Barbero
- Rehabilitation Research Laboratory, Department of Business Economics, Health and Social Care, University of Applied Sciences and Arts of Southern Switzerland, 6928 Manno, Switzerland;
| | - Deborah Falla
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham B15 1JN, UK; (A.A.); (D.W.E.); (N.H.); (A.R.)
- Correspondence: ; Tel.: +44-(0)121-415-4220
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Christensen SWM, Bellosta-López P, Doménech-García V, Herrero P, Palsson TS. Changes in Pain Sensitivity and Conditioned Pain Modulation During Recovery From Whiplash-associated Disorders. Clin J Pain 2021; 37:730-739. [PMID: 34334693 DOI: 10.1097/ajp.0000000000000970] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 07/19/2021] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The objective of this study was to investigate the pain-sensory profile of patients with whiplash-associated disorders (WADs) prior and post 2 weeks of standardized rehabilitation and after a 6-month follow-up. MATERIALS AND METHODS Twenty-two WAD participants (grade II; 14 women) and 22 sex-matched and age-matched healthy pain-free controls were enrolled. Pressure pain thresholds (PPTs) were assessed at local and distal muscles. Conditioned pain modulation (CPM) of PPTs was assessed using cuff pressure around the upper arm. Referred area of pain following supra-threshold pressure stimulation of the infraspinatus muscle was recorded on a body chart. Psychometric variables (pain intensity, area of perceived pain, pain catastrophizing, kinesiophobia, sleep problems, and depression level) were assessed. WAD group additionally completed the Neck Disability Index. RESULTS The WAD group demonstrated lower local PPTs compared with controls at all time points (P<0.05) and lower distal PPTs at baseline and at 2 weeks when compared with 6 months (within-group) (P<0.05). The WAD group had a reduced CPM response and larger induced referred pain areas compared with controls (P<0.05), while no within-group changes were observed at any time point. The WAD group reported higher pain intensity and perceived area of pain compared with controls at all time points (P<0.05) and a mean Neck Disability Index score of 41% at baseline, 16% at 2 weeks, and 4% at 6 months. Furthermore, the WAD group reported improvements in all other psychometric variables (P<0.05), although only pain catastrophizing levels were comparable to controls at 2 weeks. DISCUSSION PPTs but not CPM improved in the WAD group and were comparable to controls following 2 weeks following standardized rehabilitation, indicating that normalization of CPM may not be required to recover from WAD.
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Affiliation(s)
- Steffan W M Christensen
- Department of Health Science and Technology, Faculty of Medicine, Aalborg University
- Department of Physiotherapy, University College of Northern Denmark, Aalborg, Denmark
| | | | | | - Pablo Herrero
- Health Sciences Faculty, San Jorge University, Villanueva de Gállego
- Department of Physiatry and Nursing, Health Sciences Faculty, University of Zaragoza, Zaragoza, Spain
| | - Thorvaldur S Palsson
- Department of Health Science and Technology, Faculty of Medicine, Aalborg University
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Previtali D, Bordoni V, Filardo G, Marchettini P, Guerra E, Candrian C. High Rate of Pain Sensitization in Musculoskeletal Shoulder Diseases: A Systematic Review and Meta-analysis. Clin J Pain 2021; 37:237-48. [PMID: 33399396 DOI: 10.1097/AJP.0000000000000914] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 12/01/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Pain sensitization, defined as an increased responsiveness of nociceptive neurons to normal input, is detected in several musculoskeletal diseases, but there are no systematic reviews or meta-analyses about pain sensitization in shoulder pain. OBJECTIVES The aim of the study was to document pain sensitization rate and its impact in patients with shoulder pain. MATERIALS AND METHODS PubMed, Cochrane Library, and Web of Science were searched on January 8, 2020. Level I-IV studies, evaluating pain sensitization in musculoskeletal shoulder disorders through validated methods (questionnaires/algometry) were included. The primary outcome was pain sensitization rate. Secondary outcomes were the pain sensitivity level measured as pressure pain threshold, temporal summation, conditioned pain modulation, and suprathreshold heat pain response. Associated demographic and psychosocial factors were evaluated. RESULTS The rate of abnormal pressure pain threshold in patients with shoulder pain varied from 29% to 77%. Questionnaires detected pain sensitization in 11% to 24% of patients. This meta-analysis showed no difference in pressure pain threshold and central pain modulation but documented a significant difference in terms of suprathreshold heat pain response, indicating a hypersensitivity state in patients with shoulder pain versus asymptomatic controls. The only factor that was constantly found to correlate with higher sensitivity was a lower postoperative outcome. DISCUSSION Pain sensitization has a high rate among patients with musculoskeletal shoulder pain, regardless of the specific etiology, and this may lead to worse clinical outcome after treatment of the primary disease. The best way to assess pain sensitization still needs to be identified as the assessment methods results in used high variability in the documented pain sensitization rate.
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Allison C, Korey L, John Z S. A novel computational technique for the quantification of temporal summation in healthy individuals. Musculoskelet Sci Pract 2021; 54:102400. [PMID: 34022750 DOI: 10.1016/j.msksp.2021.102400] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/12/2021] [Accepted: 05/10/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND The pathophysiology of chronic musculoskeletal pain is linked to the neurophysiologic condition known as central sensitization. Developing reliable, sensitive and clinically feasible techniques for quantifying central sensitization is a timely priority for advancing the field of chronic pain diagnosis and management. OBJECTIVE To compare the sensitivity of the Windup Ratio, a commonly employed Quantitative Sensory Testing (QST) technique, to a novel approach, the Sumsquare method, for detecting changes in experimentally induced central sensitization. DESIGN Individual, randomized, controlled experimental study. METHODS A total of 37 subjects assigned to experimental (N = 18) and control (N = 19) groups. Central sensitization was experimentally induced in the C5-C6 spinal segments using topical capsaicin (0.075%); controls received a non-sensitizing placebo (Lubriderm). Windup (temporal summation) was assessed using weighted pinpricks (MRC Systems, Heidelberg, Germany) applied within regions of secondary hyperalgesia surrounding the topical capsaicin. A train of 10 stimuli was applied at baseline, 10, 20 and 30 min post-topical application and participants provided numeric pain ratings after each pinprick application. Sumsquare and Windup Ratio outcomes were calculated using the pain rating data. RESULTS Sumsquare outcome was significantly increased at all time points (10, 20, 30 min) post-sensitization (p < 0.05); in contrast, no differences in Windup Ratio from baseline were observed at any time point post-sensitization (p > 0.05). CONCLUSIONS Sumsquare outcome offers greater sensitivity than Windup Ratio for detecting changes in experimentally induced central sensitization. These findings introduce a novel method for assessing changes in central sensitization in patients presenting with chronic musculoskeletal pain hypersensitivity.
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Affiliation(s)
- Clouse Allison
- Human Health and Nutritional Science, University of Guelph, Guelph, Canada
| | - Loi Korey
- Human Health and Nutritional Science, University of Guelph, Guelph, Canada
| | - Srbely John Z
- Human Health and Nutritional Science, University of Guelph, Guelph, Canada.
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11
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Petersen MW, Skovbjerg S, Jensen JS, Wisbech Carstensen TB, Dantoft TM, Fink P, Benros ME, Mortensen EL, Jørgensen T, Gormsen LK. Conditioned pain modulation and pain sensitivity in functional somatic disorders: The DanFunD study. Eur J Pain 2021; 26:154-166. [PMID: 34309927 PMCID: PMC9292427 DOI: 10.1002/ejp.1847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 07/20/2021] [Indexed: 11/09/2022]
Abstract
Background Disrupted pain regulation has been proposed as a component in functional somatic disorders (FSD). The objective of this study was to examine a general population sample, encompassing three delimitations of FSD while assessing pain sensitivity and conditioning pain modulation (CPM). Methods Pressure pain thresholds (PPTs) at the tibialis and trapezius muscles were recorded at baseline. During cold pressor stimulation of the hand, the tibialis PPTs were re‐assessed and the difference from baseline measures defined the CPM effect. Participants (n = 2,198, 53% females) were randomly selected from the adult Danish population. FSD was established by self‐reported symptom questionnaires. Results With a few exceptions, only weak associations were seen between PPTs and CPM in cases with FSD (p > .1). A high PPT was associated with lower odds of having multi‐organ bodily distress syndrome (ORPPT trapezius: 0.66, 95% CI: 0.49–0.88, p = .005), with the symptom profile characterized by all symptoms (ORPPT trapezius: 0.72, 95% CI: 0.58–0.90, p = .003 and ORPPT tibialis: 0.75, 95% CI: 0.62–0.91, p = .004), and with multiple chemical sensitivity (ORPPT trapezius: 0.81, 95% CI: 0.67–0.97, p = .022). High CPM was associated with high odds of having irritable bowel (ORCPM relative: 1.22, 95% CI: 1.04–1.43, p = .013 and ORCPM absolute = 2.66, 95% CI: 1.07–6.45, p = .033). Conclusion However, only PPT measured over the trapezius muscle were still significant after correction for multiple testing for the symptom profile characterized by all symptoms. Findings from this study do not support altered pain regulation in questionnaire‐based FSD which is in contrast with the existing presumption. Further epidemiological studies in this field are needed. Significance Disrupted pain regulation as measured by abnormal pain thresholds has been hypothesized as a central mechanism in Functional Somatic Disorders (FSD). The hypothesis has been raised in clinical setting where patients presented subjective and objective features of hypersensitivity. The present population‐based study does not support this notion. This points to the importance of further studies into the underlying pathophysiology mechanisms of FSD.
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Affiliation(s)
- Marie Weinreich Petersen
- Research Clinic for Functional Disorders and Psychosomatics, Aarhus University Hospital, Aarhus, Denmark
| | - Sine Skovbjerg
- Center for Clinical Research and Prevention, Bispebjerg & Frederiksberg Hospital, Capital Region and University of Copenhagen, Copenhagen, Denmark.,Department of Clinical Medicine, The Danish Center for Mindfulness, Aarhus University, Aarhus, Denmark
| | - Jens Søndergaard Jensen
- Research Clinic for Functional Disorders and Psychosomatics, Aarhus University Hospital, Aarhus, Denmark
| | - Tina Birgitte Wisbech Carstensen
- Research Clinic for Functional Disorders and Psychosomatics, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, University of Aarhus, Aarhus, Denmark
| | - Thomas Meinertz Dantoft
- Center for Clinical Research and Prevention, Bispebjerg & Frederiksberg Hospital, Capital Region and University of Copenhagen, Copenhagen, Denmark
| | - Per Fink
- Research Clinic for Functional Disorders and Psychosomatics, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, University of Aarhus, Aarhus, Denmark
| | | | - Erik Lykke Mortensen
- Department of Public health, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Torben Jørgensen
- Center for Clinical Research and Prevention, Bispebjerg & Frederiksberg Hospital, Capital Region and University of Copenhagen, Copenhagen, Denmark.,Department of Public health, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark.,Faculty of Medicine, Aalborg University, Aalborg, Denmark
| | - Lise Kirstine Gormsen
- Research Clinic for Functional Disorders and Psychosomatics, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, University of Aarhus, Aarhus, Denmark
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12
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Zorina-Lichtenwalter K, Maixner W, Diatchenko L. Detangling red hair from pain: phenotype-specific contributions from different genetic variants in melanocortin-1 receptor. Pain 2020; 161:938-48. [PMID: 31834199 DOI: 10.1097/j.pain.0000000000001780] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Genetic variation in melanocortin-1 receptor (MC1R) has a known role in red hair. Studies on responses to noxious stimuli in red-haired individuals have also been conducted, with mixed findings. To investigate a possible divergence between variants responsible for red hair and pain sensitivity, we performed a genewide association analysis in the Orofacial Pain: Prospective Evaluation and Risk Assessment cohort. All genotyped (17) MC1R variants were tested for association with heat pain temporal summation and sensitivity. Our analyses showed an association for pain sensitivity with the 5'-UTR, tagged by rs3212361, and 1 missense variant, rs885479 (R163Q), previously shown to be weakly associated with red hair. For both variants, the minor allele was protective. These results were validated in the 500,000-person UK Biobank cohort, where the minor alleles of rs3212361 and rs885479 were associated with a reduced count of persistent pain conditions as well as individual pain conditions. Haplotype association analysis revealed a possible joint effect from the 2 individual variants. The 5'-UTR variant rs3212361 was further identified as an expression quantitative trait locus, associated with reduced transcript levels of MC1R in the brain and in the peripheral tibial nerve. Hair colour association analysis of the loss-of-function 5'-UTR rs3212361 allele identified association with red hair, and red hair colour itself was associated with a reduced count of persistent pain conditions. Together, our results suggest that primarily different mechanisms-affecting expression levels vs protein activity-mediated by different genetic variants in the MC1R locus contribute to red hair and pain.
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Mazaheri M, Abichandani D, Kingma I, Treleaven J, Falla D. A meta-analysis and systematic review of changes in joint position sense and static standing balance in patients with whiplash-associated disorder. PLoS One 2021; 16:e0249659. [PMID: 33831060 PMCID: PMC8031393 DOI: 10.1371/journal.pone.0249659] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 03/23/2021] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE To synthesise and analyse the current evidence regarding changes in joint position sense (JPS) and standing balance in people with whiplash-associated disorder (WAD) taking the presence or absence of dizziness into account. DATA SOURCES PubMed, CINAHL Plus, Web of Science, Embase, MEDLINE and APA PsycINFO were searched by two independent reviewers from inception until August 2020 and reference lists of all included studies were also reviewed. STUDY SELECTION Only cross-sectional studies that measured JPS and/or standing balance between people with WAD vs. healthy controls (HC) or people with WAD complaining of dizziness (WADD) vs. those not complaining of dizziness (WADND) were selected. DATA EXTRACTION Relevant data were extracted using specific checklists and quality assessment was performed using Downs and Black Scale (modified version). DATA SYNTHESIS Twenty-six studies were included. For JPS, data were synthesized for absolute error in the primary plane of movement for separate movement directions. For standing balance, data were synthesized for traditional time- and frequency domain sway parameters considering the conditions of eyes open (EO) and eyes closed (EC) separately. For meta-analysis, reduced JPS was observed in people with WAD compared to HC when the head was repositioned to a neutral head position (NHP) from rotation (standardised mean difference [SMD] = 0.43 [95%: 0.24-0.62]) and extension (0.33 [95%CI: 0.08-0.58]) or when the head was moved toward 50° rotation from a NHP (0.50 [0.05-0.96]). Similarly, people with WADD had reduced JPS compared to people with WADND when the head was repositioned to a NHP from rotation (0.52 [0.22-0.82]). Larger sway velocity and amplitude was found in people with WAD compared to HC for both EO (0.62 [0.37-0.88] and 0.78 [0.56-0.99], respectively) and EC (0.69 [0.46-0.91] and 0.80 [0.58-1.02]) conditions. CONCLUSION The observed changes of JPS and standing balance confirms deficits in sensorimotor control in people with WAD and especially in those with dizziness.
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Affiliation(s)
- Masood Mazaheri
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Deepa Abichandani
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
- Lecturer in Physiotherapy, Institute of Health and Social Care, London South Bank University, London, United Kingdom
| | - Idsart Kingma
- Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Julia Treleaven
- Division of Physiotherapy, School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia
| | - Deborah Falla
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
- * E-mail:
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14
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Hansen S, Dalgaard RC, Mikkelsen PS, Sørensen MB, Petersen KK. Modulation of Exercise-Induced Hypoalgesia Following an Exercise Intervention in Healthy Subjects. Pain Med 2020; 21:3556-3566. [PMID: 32984895 DOI: 10.1093/pm/pnaa212] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Exercise is recommended to promote and maintain health and as treatment for more than 25 diseases and pain conditions. Exercise-induced hypoalgesia (EIH), a measure of descending pain inhibitory control, has been found to be impaired in some chronic pain conditions, but it is currently unclear if EIH is modifiable. This study investigated whether a long-term exercise intervention could modulate EIH in healthy subjects. METHODS In 38 healthy subjects, EIH was assessed as change in pressure pain threshold (PPT) after a three-minute isometric wall squat within the first week and after approximately seven weeks of military training (MT). Further, temporal summation of pain (TSP) and Knee injury and Osteoarthritis Outcome Score (KOOS) were assessed. Physical performance capacity was assessed using the Endurance 20-m shuttle run fitness test (20MSR). Hypoalgesic (EIH > 0.0 kPa) and hyperalgesic (EIH ≤ 0.0 kPa) subgroups were defined based on baseline EIH. Change in EIH following MT was used as the primary outcome. RESULTS Increased EIH (P = 0.008), PPT (P < 0.003), and 20MSR (P < 0.001) were found following MT, with no changes in TSP and KOOS (P > 0.05). Subjects with a hyperalgesic EIH response at baseline (26% of the participants) presented significantly improved EIH following MT (P = 0.010). Finally, an association between 20MRS change and EIH change was found (r = 0.369, P = 0.023). CONCLUSIONS MT increased EIH, especially in subjects who demonstrated a hyperalgesic response at baseline. Improvement in physical performance capacity was associated with an improvement in EIH, indicating that improvement in physical performance capacity may improve central pain mechanisms.
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Affiliation(s)
- Simon Hansen
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
| | | | | | - Mathias Brandhøj Sørensen
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
| | - Kristian Kjær Petersen
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark.,Department of Health Science and Technology, Faculty of Medicine, Center for Neuroplasticity and Pain, Aalborg University, Aalborg, Denmark
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15
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Hendriks E, Voogt L, Lenoir D, Coppieters I, Ickmans K. Convergent Validity of the Central Sensitization Inventory in Chronic Whiplash-Associated Disorders; Associations with Quantitative Sensory Testing, Pain Intensity, Fatigue, and Psychosocial Factors. Pain Med 2020; 21:3401-3412. [PMID: 32935129 DOI: 10.1093/pm/pnaa276] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECTIVE Central sensitization is present in different pain conditions, including chronic whiplash-associated disorders. In the absence of a gold standard method of assessment to determine the presence of central sensitization, quantitative sensory testing is currently understood as an optimal proxy. Laboratory sensory testing is, however, not feasible in clinical practice, and the Central Sensitization Inventory was developed as an alternative. The aim of the current study was to evaluate the convergent validity of the Central Sensitization Inventory in chronic whiplash-associated patients by determining the association between the Central Sensitization Inventory and quantitative sensory testing, pain intensity, fatigue, and psychosocial factors. METHODS A total of 125 chronic whiplash-associated patients completed multiple questionnaires and were subjected to pressure pain thresholds and temporal summation. RESULTS . The Central Sensitization Inventory showed a strong association with constructs of general psychopathology, anxiety, distress, depression, and somatization in chronic whiplash-associated disorders. Moderate correlations were found with fatigue and intrusive and avoidant phenomena after a variety of traumatic events. No significant association was found between the Central Sensitization Inventory and pressure pain thresholds and temporal summation, nor between the Central Sensitization Inventory and other pain measurements. CONCLUSIONS Overall, we found that the Central Sensitization Inventory is better in identifying the psychosocial factors related to central sensitization in chronic whiplash-associated disorders than the central nervous system adaptations. Thus, the convergent validity of the Central Sensitization Inventory appears to be only partially present in chronic whiplash-associated disorders.
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Affiliation(s)
- Erwin Hendriks
- Pain in Motion research group, Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Rehabilitation Centre Drechtsteden/Haaglanden, Dordrecht, the Netherlands.,Research Centre for Health Care Innovations, Rotterdam University of Applied Sciences, Rotterdam, the Netherlands.,Unit Physiotherapy, Organizational Part of the Orthopedics Department, Erasmus Medical Centre, Rotterdam, the Netherlands
| | - Lennard Voogt
- Pain in Motion research group, Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Research Centre for Health Care Innovations, Rotterdam University of Applied Sciences, Rotterdam, the Netherlands
| | - Dorine Lenoir
- Pain in Motion research group, Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Rehabilitation Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Iris Coppieters
- Pain in Motion research group, Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Rehabilitation Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.,Department of Physical Medicine and Physiotherapy, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Kelly Ickmans
- Pain in Motion research group, Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, Universitair Ziekenhuis Brussel, Brussels, Belgium.,Research Foundation-Flanders (FWO), Brussels, Belgium
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16
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Goudman L, Daenen L, Mouraux A, Nijs J, Cras P, Roussel N, Moens M, Coppieters I, Huysmans E, De Kooning M. Processing of Laser-Evoked Potentials in Patients with Chronic Whiplash-Associated Disorders, Chronic Fatigue Syndrome, and Healthy Controls: A Case-Control Study. Pain Med 2020; 21:2553-2563. [PMID: 32289826 DOI: 10.1093/pm/pnaa068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Laser-evoked potentials (LEPs) are among the reliable neurophysiological tools to investigate patients with neuropathic pain, as they can provide an objective account of the functional status of thermo-nociceptive pathways. The goal of this study was to explore the functioning of the nociceptive afferent pathways by examining LEPs in patients with chronic whiplash-associated disorders (cWAD), patients with chronic fatigue syndrome (CFS), and healthy controls (HCs). DESIGN Case-control study. SETTING A single medical center in Belgium. SUBJECTS The LEPs of 21 patients with cWAD, 19 patients with CFS, and 18 HCs were analyzed in this study. METHODS All participants received brief nociceptive CO2 laser stimuli applied to the dorsum of the left hand and left foot while brain activity was recorded with a 32-channel electroencephalogram (EEG). LEP signals and transient power modulations were compared between patient groups and HCs. RESULTS No between-group differences were found for stimulus intensity, which was supraliminal for Aδ fibers. The amplitudes and latencies of LEP wave components N1, N2, and P2 in patients with cWAD and CFS were statistically similar to those of HCs. There were no significant differences between the time-frequency maps of EEG oscillation amplitude between HCs and both patient populations. CONCLUSIONS EEG responses of heat-sensitive Aδ fibers in patients with cWAD and CFS revealed no significant differences from the responses of HCs. These findings thus do not support a state of generalized central nervous system hyperexcitability in those patients.
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Affiliation(s)
- Lisa Goudman
- Department of Neurosurgery, Universitair Ziekenhuis Brussel, Brussels, Belgium.,Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Liesbeth Daenen
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Knowledge, Information and Research Center (KIR), Group Idewe, Louvain, Belgium
| | - Andre Mouraux
- Institute of Neuroscience, Université Catholique de Louvain, Brussels, Belgium
| | - Jo Nijs
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Patrick Cras
- Laboratory of Neurology, Translational Neurosciences, University of Antwerp, Wilrijk, Belgium.,Institute Born-Bunge, University of Antwerp, Wilrijk, Belgium.,Department of Neurology, Antwerp University Hospital, Edegem, Belgium
| | - Nathalie Roussel
- Department of Rehabilitation Sciences and Physiotherapy (MOVANT), Faculty of Medicine and Health Sciences, University of Antwerp, Campus, Drie Eiken, Wilrijk, Belgium
| | - Maarten Moens
- Department of Neurosurgery, Universitair Ziekenhuis Brussel, Brussels, Belgium.,Center for Neurosciences (C4N), Vrije Universiteit Brussel (VUB), Brussels, Belgium.,Department of Radiology, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Iris Coppieters
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Eva Huysmans
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, Universitair Ziekenhuis Brussel, Brussels, Belgium.,Department of Public Health (GEWE), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Margot De Kooning
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, Universitair Ziekenhuis Brussel, Brussels, Belgium
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17
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Farrell SF, Zoete RMJ, Cabot PJ, Sterling M. Systemic inflammatory markers in neck pain: A systematic review with meta‐analysis. Eur J Pain 2020; 24:1666-1686. [DOI: 10.1002/ejp.1630] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 06/28/2020] [Indexed: 01/08/2023]
Affiliation(s)
- Scott F. Farrell
- RECOVER Injury Research Centre NHMRC Centre for Research Excellence in Recovery Following Road Traffic Injuries The University of Queensland Brisbane Queensland Australia
- Menzies Health Institute Queensland Griffith University Gold Coast Queensland Australia
| | - Rutger M. J. Zoete
- RECOVER Injury Research Centre NHMRC Centre for Research Excellence in Recovery Following Road Traffic Injuries The University of Queensland Brisbane Queensland Australia
- School of Allied Health Science and Practice The University of Adelaide Adelaide South Australia Australia
| | - Peter J. Cabot
- School of Pharmacy The University of Queensland Brisbane Queensland Australia
| | - Michele Sterling
- RECOVER Injury Research Centre NHMRC Centre for Research Excellence in Recovery Following Road Traffic Injuries The University of Queensland Brisbane Queensland Australia
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18
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Middlebrook N, Heneghan NR, Evans DW, Rushton A, Falla D. Reliability of temporal summation, thermal and pressure pain thresholds in a healthy cohort and musculoskeletal trauma population. PLoS One 2020; 15:e0233521. [PMID: 32469913 PMCID: PMC7259760 DOI: 10.1371/journal.pone.0233521] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 05/06/2020] [Indexed: 01/09/2023] Open
Abstract
Traumatic injuries affect approximately 978 million people worldwide with 56.2 million requiring inpatient care. Quantitative sensory testing (QST) can be useful in predicting outcome following trauma, however the reliability of multiple QST including temporal summation (TS), heat and cold pain thresholds (HPT, CPT) and pressure pain thresholds (PPT) is unknown. We assessed intra (between day) and inter-rater (within day) reliability of QST in asymptomatic participants (n = 21), and inter-rater (within day) reliability in participants presenting with acute musculoskeletal trauma (n = 25). Intra-class correlations with 95% confidence intervals (ICC 3,2), standard error of measurement (SEM) and Bland Altman Plots for limits of agreement were calculated. For asymptomatic participants, reliability was good to excellent for HPT (ICC range 0.76–0.95), moderate to good for PPT (ICC range 0.52–0.93), with one site rated poor (ICC 0.41), and poor to excellent for TS scores (ICC range 0.20–0.91). For musculoskeletal trauma participants reliability was good to excellent for HPT and PPT (ICC range 0.76–0.86), and moderate to good reliability for TS (ICC range 0.69–0.91). SEM for HPT for both sets of participants was ~1°C and an average of 7N for asymptomatic participants and less than 8N for acute musculoskeletal trauma participants for PPT. This study demonstrates moderate to excellent intra and inter-rater reliability for HPT and PPT in asymptomatic participants and good to excellent inter-rater reliability for acute musculoskeletal trauma participants, with TS showing more variability for both sets of participants. This study provides foundations for future work evaluating the sensory function over time following acute musculoskeletal trauma.
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Affiliation(s)
- Nicola Middlebrook
- Centre of Precision Rehabilitation for Spinal Pain, School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
- NIHR Surgical Reconstruction & Microbiology Research Centre, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Nicola R. Heneghan
- Centre of Precision Rehabilitation for Spinal Pain, School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - David W. Evans
- Centre of Precision Rehabilitation for Spinal Pain, School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Alison Rushton
- Centre of Precision Rehabilitation for Spinal Pain, School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
- NIHR Surgical Reconstruction & Microbiology Research Centre, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Deborah Falla
- Centre of Precision Rehabilitation for Spinal Pain, School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
- NIHR Surgical Reconstruction & Microbiology Research Centre, University of Birmingham, Edgbaston, Birmingham, United Kingdom
- * E-mail:
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19
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Stone DB, Ward EC, Knijnik SR, Bogaardt H, Elliott JM. Whiplash-Associated Dysphagia and Dysphonia: A Scoping Review. Dysphagia 2020; 36:303-315. [PMID: 32445061 DOI: 10.1007/s00455-020-10137-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 05/15/2020] [Indexed: 01/23/2023]
Abstract
Swallowing and voice complaints after a whiplash injury have been observed and reported in several studies; however, variability in study design complicates current understanding of whether dysphagia and dysphonia should be recognised as potential adverse outcomes. A scoping review was conducted across six databases from 1950 to March 2019. A total of 18 studies were included for review. Data regarding study purpose, design, outcome measures, participant characteristics and outcomes reported were extracted. Level of evidence (LOE) was assessed by the American Speech-Language Language Association (ASHA)'s LOE system. All studies were exploratory, with 68% rated as poor (< 3) on quality ratings. Nearly half (n = 6) were single case reports. Only three studies investigated some type of swallow-related outcome specifically within the study aim/s. Incidence of swallow-related problems ranged from 2 to 29%, with unspecified complaints of "swallowing difficulty", "dysphagia" and fatigue and pain whilst chewing reported. Neither swallowing biomechanics nor the underlying pathophysiology of swallow or voice complaints was investigated in any study. Four case studies presented post-whiplash voice complaints; two of which described loss of pitch range. Others described hoarseness, loss of control and weak phonation. Most studies only mentioned swallow- or voice-related deficits when reporting a wider set of post-injury symptomatology and six did not describe the outcome measure used to identify the swallow and voice-related problems reported. The existing literature is limited and of low quality, contributing to an unclear picture of the true incidence and underlying mechanisms of whiplash-related dysphagia and dysphonia.
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Affiliation(s)
- D B Stone
- Faculty of Medicine and Health, School of Health Sciences, The University of Sydney, Sydney, NSW, Australia. .,Speech Pathology Department, Royal North Shore Hospital, Northern Sydney Local Health District, St Leonards, NSW, 2065, Australia. .,Neuromuscular Imaging Research Laboratory, Kolling Institute at the Northern Sydney Local Health District, Sydney, Australia.
| | - E C Ward
- School of Health and Rehabilitation Sciences, The University of Queensland and Centre for Functioning and Health Research (CFAHR) Metro South Hospital and Health Services, Brisbane, QLD, Australia
| | - S R Knijnik
- Faculty of Medicine and Health, School of Health Sciences, The University of Sydney, Sydney, NSW, Australia.,The Federal University of Health Sciences of Porto Alegre, Porto Alegre, Brazil.,The Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - H Bogaardt
- Faculty of Medicine and Health, School of Health Sciences, The University of Sydney, Sydney, NSW, Australia
| | - J M Elliott
- Faculty of Medicine and Health, School of Health Sciences, The University of Sydney, Sydney, NSW, Australia.,Neuromuscular Imaging Research Laboratory, Kolling Institute at the Northern Sydney Local Health District, Sydney, Australia.,Department of Physical Therapy and Human Movement Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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20
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Abstract
Background Although the Eph receptor plays an important role in the development of neuropathic pain following nerve injury, there has been no evidence of the participation of the ephrin A4 receptor (EphA4) in the development of trigeminal neuropathic pain. The present study investigated the role of EphA4 in central nociceptive processing in rats with inferior alveolar nerve injury. Materials and Methods Male Sprague-Dawley rats were used in all our experiments. A rat model for trigeminal neuropathic pain was produced using malpositioned dental implants. The left mandibular second molar was extracted under anesthesia, followed by the placement of a miniature dental implant to injure the inferior alveolar nerve. Results Our current findings show that nerve injury induced by malpositioned dental implants evokes significant mechanical allodynia and up-regulation of EphA4 expression in the ipsilateral trigeminal subnucleus caudalis. Although daily treatment with EphA4-Fc, an EphA4 antagonist, did not produce prolonged anti-allodynic effects after the chronic neuropathic pain had been already established, an early treatment protocol with repeated EphA4-Fc administration significantly attenuated mechanical allodynia before initiation of chronic neuropathic pain. Finally, we confirmed the participation of the central EphA4 pathway in the development of trigeminal neuropathic pain by reducing EphA4 expression using EphA4 siRNA. This suppression of EphA4 produced significantly prolonged anti-allodynic effects. Conclusion These results suggest that early blockade of central EphA4 signaling provides a new therapeutic target for the treatment of trigeminal neuropathic pain.
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Affiliation(s)
- Min-Ji Kim
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Jo-Young Son
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Jin-Sook Ju
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Dong-Kuk Ahn
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, Daegu, Korea
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21
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Smith A, Ritchie C, Warren J, Sterling M. Exercise-induced Hypoalgesia Is Impaired in Chronic Whiplash-associated Disorders (WAD) With Both Aerobic and Isometric Exercise. Clin J Pain 2020; 36:601-611. [DOI: 10.1097/ajp.0000000000000845] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Farrell SF, Cowin G, Pedler A, Durbridge G, Sterling M. Spinal cord injury is not a feature of chronic whiplash-associated disorder: a magnetic resonance spectroscopy study. Eur Spine J 2020; 29:1212-1218. [PMID: 32303835 DOI: 10.1007/s00586-020-06407-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 03/30/2020] [Indexed: 11/25/2022]
Abstract
PURPOSE Injury to the cervical spinal cord has been suggested as a mechanism that may underpin chronic whiplash-associated disorder (WAD). This study aimed to assess metabolite concentrations indicative of neuronal injury or pathology in the cervical cord in people with chronic WAD. METHODS Forty-one people with chronic WAD (mean [SD] age 39.6 [11.0] years, 25 females) and 14 healthy controls (39.2 [12.6] years, 9 females) underwent cervical spinal cord magnetic resonance spectroscopy to measure the metabolites N-acetylaspartate (NAA), creatine (Cr) and choline (Cho). Participants with WAD completed clinical questionnaires on pain intensity (Visual Analogue Scale), disability (Neck Disability Index) and psychological factors (Pain Catastrophising Scale, Post-traumatic Diagnostic Scale), and underwent cervical range of motion assessment and pain threshold testing to cold and pressure stimuli. Data were analysed using hypothesis testing and Spearman correlations (p < 0.05). RESULTS There were no differences between the WAD and control groups for NAA/Cr (median [IQR] WAD 1.73 [1.38, 1.97], controls 2.09 [1.28, 2.89], p = 0.37), NAA/Cho (WAD 1.50 [1.18, 2.01], controls 1.57 [1.26, 1.93], p = 0.91) or Cr/Cho (WAD 0.84 [0.64, 1.17], controls 0.76 [0.60, 0.91], p = 0.33). There were no significant correlations between NAA/Cr, NAA/Cho or Cr/Cho and any clinical variable (p ≥ 0.06). CONCLUSIONS Findings are consistent with major metabolic changes not being present in chronic WAD.
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Affiliation(s)
- Scott F Farrell
- RECOVER Injury Research Centre, NHMRC Centre of Research Excellence in Recovery Following Road Traffic Injury, The University of Queensland, Herston Road, Brisbane, 4000, QLD, Australia
- Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD, Australia
| | - Gary Cowin
- Centre for Advanced Imaging, The University of Queensland, Brisbane, QLD, Australia
| | - Ashley Pedler
- RECOVER Injury Research Centre, NHMRC Centre of Research Excellence in Recovery Following Road Traffic Injury, The University of Queensland, Herston Road, Brisbane, 4000, QLD, Australia
| | - Gail Durbridge
- Centre for Advanced Imaging, The University of Queensland, Brisbane, QLD, Australia
| | - Michele Sterling
- RECOVER Injury Research Centre, NHMRC Centre of Research Excellence in Recovery Following Road Traffic Injury, The University of Queensland, Herston Road, Brisbane, 4000, QLD, Australia.
- Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD, Australia.
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23
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Farrell SF, Sterling M, Irving-Rodgers H, Schmid AB. Small fibre pathology in chronic whiplash-associated disorder: A cross-sectional study. Eur J Pain 2020; 24:1045-1057. [PMID: 32096260 DOI: 10.1002/ejp.1549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 01/27/2020] [Accepted: 02/18/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Mechanisms underpinning ongoing symptoms in chronic whiplash associated-disorder (WAD) are not well understood. People with chronic WAD can exhibit sensory dysfunction consistent with small nerve fibre pathology, including thermal hypoaesthesia and hyperalgesia. This study investigated small fibre structure and function in chronic WAD. METHODS Twenty-four people with chronic WAD (median [IQR] age 49 [15] years, 16 females) and 24 pain-free controls (50 [17] years, 16 females) were recruited. Intraepidermal nerve fibre density (IENFD) and dermal innervation were assessed by skin biopsy. This was performed at (a) the lateral index finger on the primary side of pain and (b) superior to the lateral malleolus on the contralateral side. Quantitative sensory testing was performed over the hand. RESULTS The WAD group exhibited lower IENFD at the finger (WAD: median [IQR] 4.5 [4.9] fibres/mm; control 7.3 [3.9]; p = .010), but not the ankle (WAD: mean [SD] 7.3 [3.7] fibres/mm; control 9.3 [3.8]; p = .09). Dermal innervation was lower in the WAD group at the finger (WAD: median [IQR] 3.7 [2.8] nerve bundles/mm2 ; controls: 4.9 [2.1]; p = .017) but not the ankle (WAD: median [IQR] 2.1 [1.9] nerve bundles/mm2 ; controls: 1.8 [1.8]; p = .70). In the WAD group, hand thermal and light touch detection were impaired, and heat pain thresholds were lowered (p ≤ .037). CONCLUSIONS Findings suggest small fibre structural and functional deficits in chronic WAD, implicating potential involvement of small fibre pathology. SIGNIFICANCE Our study found decreased intraepidermal nerve fibre density, reduced dermal innervation, thermal hypoaesthesia and hypersensitivity in people with chronic WAD, suggestive of small fibre pathology. This observation of peripheral nervous system pathology in chronic whiplash provides novel insights on mechanisms underpinning symptoms and challenges commonly held beliefs regarding this condition.
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Affiliation(s)
- Scott F Farrell
- RECOVER Injury Research Centre, NHMRC Centre for Research Excellence in Recovery Following Road Traffic Injuries, The University of Queensland, Brisbane, QLD, Australia.,Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD, Australia
| | - Michele Sterling
- RECOVER Injury Research Centre, NHMRC Centre for Research Excellence in Recovery Following Road Traffic Injuries, The University of Queensland, Brisbane, QLD, Australia.,Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD, Australia
| | - Helen Irving-Rodgers
- Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD, Australia.,School of Medical Sciences, Griffith University, Gold Coast, QLD, Australia
| | - Annina B Schmid
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
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24
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Bilika P, Neblett R, Georgoudis G, Dimitriadis Z, Fandridis E, Strimpakos N, Kapreli E. Cross-cultural Adaptation and Psychometric Properties of the Greek Version of the Central Sensitization Inventory. Pain Pract 2020; 20:188-196. [PMID: 31605651 DOI: 10.1111/papr.12843] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/25/2019] [Accepted: 10/08/2019] [Indexed: 12/29/2022]
Abstract
OBJECTIVES Recent studies support the opinion that central sensitization (CS) plays an important role in the pathophysiology of many chronic pain conditions. CS refers to hyperexcitability of the central nervous system, which can result in pain hypersensitivity and other somatosensory symptoms. Recognition of CS-related symptomology is crucial in chronic pain evaluation and rehabilitation. The Central Sensitization Inventory (CSI) was created to evaluate symptoms that have been found to be associated with CS. The aim of the current study was the cross-cultural adaptation of the CSI into Greek (CSI-Gr). METHODS To evaluate discriminate validity, 200 patients with chronic pain and 50 healthy control subjects participated. The sample was divided into 4 diagnostic groups (fibromyalgia, single pain complaints, multiple pain complaints, and a control group) and into 5 CSI severity subgroups, from subclinical to extreme. Convergent validity was determined by evaluation of the relationship between the CSI-Gr and the Pain Catastrophizing Scale (PCS). Additionally, 30 patients completed the CSI a second time for the purpose of a test/retest analysis. RESULTS The results showed high internal consistency (Cronbach's alpha = 0.994) and test-retest reliability (intraclass correlation coefficient = 0.993). The standard error of measurement was 2.1. The CSI-Gr correlated moderately with the PCS (r = 0.68). Statistically significant differences were found among the 3 comparison groups, with patients who had fibromyalgia reporting the highest CSI severity and healthy control subjects reporting the lowest severity. CONCLUSIONS As determined in the present study, the CSI-Gr was found to be a reliable and valid tool for recognition of CS-related symptomology.
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Affiliation(s)
- Paraskevi Bilika
- Clinical Exercise Physiology and Rehabilitation Laboratory, Physiotherapy Department, University of Thessaly, Lamia, Greece.,Postgraduate Programme MSc in Advanced Physiotherapy, University of Thessaly, Lamia, Greece
| | | | - George Georgoudis
- Musculoskeletal & Chest Physiotherapy Laboratory, Physiotherapy Department, University of West Attika, Athens, Greece
| | - Zacharias Dimitriadis
- Health Assessment and Quality of Life Laboratory, Physiotherapy Department, University of Thessaly, Lamia, Greece
| | - Emmanouil Fandridis
- Hand-Upper Limb-Microsurgery Department, General Hospital KAT, Athens, Greece
| | - Nikolaos Strimpakos
- Postgraduate Programme MSc in Advanced Physiotherapy, University of Thessaly, Lamia, Greece.,Health Assessment and Quality of Life Laboratory, Physiotherapy Department, University of Thessaly, Lamia, Greece.,Division of Musculoskeletal & Dermatological Sciences, The University of Manchester, Manchester, U.K
| | - Eleni Kapreli
- Clinical Exercise Physiology and Rehabilitation Laboratory, Physiotherapy Department, University of Thessaly, Lamia, Greece.,Postgraduate Programme MSc in Advanced Physiotherapy, University of Thessaly, Lamia, Greece
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25
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Park MK, Kang SH, Son JY, Lee MK, Ju JS, Bae YC, Ahn DK. Co-Administered Low Doses Of Ibuprofen And Dexamethasone Produce Synergistic Antinociceptive Effects On Neuropathic Mechanical Allodynia In Rats. J Pain Res 2019; 12:2959-2968. [PMID: 31802933 PMCID: PMC6826197 DOI: 10.2147/jpr.s222095] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 09/21/2019] [Indexed: 12/20/2022] Open
Abstract
Background The traditional analgesics used to treat neuropathic pain such as anticonvulsants, opioids, and nonsteroidal anti-inflammatory drugs (NSAIDs) lack efficacy and/or carry unpleasant side effects. The present study aimed to investigate the synergistic antinociceptive effects of co-administered low doses of ibuprofen and dexamethasone in rats with trigeminal neuropathic pain. Materials and methods A Sprague-Dawley rat model for trigeminal neuropathic pain was produced using mal-positioned dental implants. The left mandibular second molar was extracted under anesthesia and replaced with a miniature dental implant to induce injury to the inferior alveolar nerve. Results Monotherapy with intraperitoneal injection of high-dose ibuprofen (30 mg/kg) or dexamethasone (10 mg/kg) but not low-dose ibuprofen (1, 5, 10 mg/kg) or dexamethasone (0.01, 1 mg/kg) attenuated the neuropathic mechanical allodynia in the rats with inferior alveolar nerve injury. We examined the synergistic antinociceptive effects of co-administered ibuprofen (5 mg/kg) and dexamethasone (0.01, 0.1, 1 mg/kg). The early co-administration of ibuprofen (5 mg/kg) with dexamethasone (0.1, 1 mg/kg) on postoperative days (POD) 1–3 significantly inhibited mechanical allodynia before the pain had been established. We also observed the synergistic antinociceptive effects of the same doses the combined treatment on mechanical allodynia on POD 7–9, when the pain had already been established. The attenuation of c-fos immuno-positive cells in the ipsilateral trigeminal subnucleus caudalis after the intraperitoneal co-administration of ibuprofen (5 mg/kg) with dexamethasone (1 mg/kg) confirmed these synergistic antinociceptive effects. Moreover, the magnitude of the effects of this co-administration was comparable with that of gabapentin both before and after the pain had been established. Conclusion These results suggest that a combination of ibuprofen and dexamethasone at low doses is an alternative therapeutic strategy for neuropathic pain and provide a rationale for the use of such drug combinations in patients who are unable to tolerate high-dose monotherapy.
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Affiliation(s)
- Min K Park
- Department of Dental Hygiene, Kyungwon University, Gumi, Korea
| | - Song H Kang
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Jo Y Son
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Min K Lee
- Department of Dental Hygiene, Dong-Eui University, Busan, Korea
| | - Jin S Ju
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Yong C Bae
- Department of Oral Anatomy, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Dong K Ahn
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, Daegu, Korea
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26
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Pas R, Ickmans K, Van Oosterwijck S, Van der Cruyssen K, Foubert A, Leysen L, Nijs J, Meeus M. Hyperexcitability of the Central Nervous System in Children with Chronic Pain: A Systematic Review. Pain Med 2019; 19:2504-2514. [PMID: 29304243 DOI: 10.1093/pm/pnx320] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Objective Hyperexcitability of the central nervous system plays an important role in the development and maintenance of chronic pain in adults. This knowledge has led to improved treatment strategies within this population. In children, however, research on the presence of central hyperexcitability is scarce. To further investigate this topic in children with chronic pain, there is a need for a clear literature overview. Design Systematic review. Methods The literature search was performed using the electronic databases PubMed and Web of Science. An article was considered eligible if it included children (age two to 12 years) diagnosed with chronic pain. Articles had to report original research outcomes related to central hyperexcitability, and a comparison with a healthy control group was necessary. Characteristics of the study sample, the assessment, and conclusions regarding central hyperexcitability were extracted from each included article. Results Twelve case-control studies were included with moderate to good methodological quality (510 children with chronic pain and 670 healthy controls). After summarizing the articles' results on indices of central hyperexcitability, we concluded that secondary hyperalgesia might be present in children with recurrent abdominal pain, juvenile fibromyalgia, and juvenile idiopathic arthritis. Preliminary evidence exists for altered cortical nociceptive processing in children with migraine and recurrent abdominal pain. Conclusion Based on the results of this review, central hyperexcitability might be present in in several pediatric chronic pain conditions. Further research on other manifestations of central hyperexcitability (e.g., bottom-up and top-down mechanisms and nociceptive brain changes) is necessary to provide firm evidence about its presence in children with chronic pain.
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Affiliation(s)
- Roselien Pas
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy (KIMA), Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Kelly Ickmans
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy (KIMA), Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, University Hospital Brussels, Belgium
| | - Sophie Van Oosterwijck
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Kelly Van der Cruyssen
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Anthe Foubert
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Laurence Leysen
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy (KIMA), Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Jo Nijs
- Pain in Motion International Research Group.,Department of Physiotherapy, Human Physiology and Anatomy (KIMA), Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, University Hospital Brussels, Belgium
| | - Mira Meeus
- Pain in Motion International Research Group.,Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
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27
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Mista CA, Laugero SJ, Adur JF, Andersen OK, Biurrun Manresa JA. A new experimental model of muscle pain in humans based on short‐wave diathermy. Eur J Pain 2019; 23:1733-1742. [DOI: 10.1002/ejp.1449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 06/24/2019] [Accepted: 06/26/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Christian A. Mista
- Institute for Research and Development on Bioengineering and Bioinformatics (IBB) CONICET‐UNER Oro Verde Argentina
- Laboratory for Rehabilitation Engineering and Neuromuscular and Sensory Research (LIRINS) National University of Entre Ríos Oro Verde Argentina
| | - Silvio J. Laugero
- Department of Bioengineering National University of Entre Ríos Oro Verde Argentina
| | - Javier F. Adur
- Institute for Research and Development on Bioengineering and Bioinformatics (IBB) CONICET‐UNER Oro Verde Argentina
- Department of Bioengineering National University of Entre Ríos Oro Verde Argentina
| | - Ole K. Andersen
- Center for Neuroplasticity and Pain (CNAP), SMI®, Faculty of Medicine Aalborg University Aalborg Denmark
| | - José A. Biurrun Manresa
- Institute for Research and Development on Bioengineering and Bioinformatics (IBB) CONICET‐UNER Oro Verde Argentina
- Laboratory for Rehabilitation Engineering and Neuromuscular and Sensory Research (LIRINS) National University of Entre Ríos Oro Verde Argentina
- Center for Neuroplasticity and Pain (CNAP), SMI®, Faculty of Medicine Aalborg University Aalborg Denmark
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28
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Linde LD, Srbely JZ. The Acute Effect of Skin Preheating on Capsaicin-Induced Central Sensitization in Humans. Pain Pract 2019; 19:811-820. [PMID: 31231923 DOI: 10.1111/papr.12811] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 05/17/2019] [Accepted: 06/11/2019] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Topical capsaicin is commonly employed to experimentally induce central sensitization (CS) in humans. While previous studies have investigated the effect of skin preheating on the sensitizing effect of capsaicin, no studies have compared the synergistic effect of skin preheating on the magnitude of sensitization via topical capsaicin within the first 30 minutes of application. We tested the hypothesis that skin preheating potentiates the sensitizing effect of topical capsaicin by evoking a larger region of secondary hyperalgesia vs. topical capsaicin alone. METHODS Twenty young, healthy subjects each received topical capsaicin (Zostrix HP 0.075%) only (CAP), topical capsaicin with preheating (CAP + HEAT), and topical nonsensitizing placebo cream (CON) in a crossover design. Capsaicin and placebo creams were applied to a 50 cm2 area of the dorsal forearm. The CAP + HEAT session also included a 10-minute preheating session. Regions of secondary hyperalgesia were assessed using mechanical brush allodynia testing, and skin temperature was assessed via infrared thermography. Outcomes were normalized to baseline and compared at 10, 20, and 30 minutes after cream application. RESULTS The CAP + HEAT session led to a significantly larger area of secondary hyperalgesia compared to the CAP session as measured by brush allodynia (CON: 0 ± 0 cm; CAP: 2.08 ± 0.45 cm; CAP + HEAT: 3.70 ± 0.46 cm; P < 0.05) and skin temperature (CON: -2.92% ± 0.03%; CAP: -0.63% ± 0.09%; CAP + HEAT: 2.50% ± 0.11%; ( of baseline) P < 0.05). CONCLUSION Preheating amplifies the sensitizing effect of topical capsaicin within 30 minutes of application. The heat-capsaicin technique may be employed to assess differing magnitudes of CS induction and enables future studies investigating the development and progression of CS in humans.
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Affiliation(s)
- Lukas D Linde
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - John Z Srbely
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
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29
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Smith BE, Hendrick P, Bateman M, Holden S, Littlewood C, Smith TO, Logan P. Musculoskeletal pain and exercise-challenging existing paradigms and introducing new. Br J Sports Med 2019; 53:907-912. [PMID: 29925503 PMCID: PMC6613745 DOI: 10.1136/bjsports-2017-098983] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Benjamin E Smith
- Physiotherapy Department (Level 3), Derby Hospitals NHS Foundation Trust, London Road Community Hospital, Derby, UK
- Division of Rehabilitation and Ageing, School of Medicine, University of Nottingham, Nottingham, UK
| | - Paul Hendrick
- Division of Physiotherapy and Rehabilitation Sciences, School of Health Sciences, University of Nottingham, Nottingham University Hospitals, Nottingham, UK
| | - Marcus Bateman
- Physiotherapy Department (Level 3), Derby Hospitals NHS Foundation Trust, London Road Community Hospital, Derby, UK
| | - Sinead Holden
- Research Unit for General Practice in Aalborg, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
- SMI, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Chris Littlewood
- Arthritis Research UK Primary Care Centre, Research Institute for Primary Care & Health Sciences and Keele Clinical Trials Unit, Keele University, Staffordshire, UK
| | - Toby O Smith
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Pip Logan
- Division of Rehabilitation and Ageing, School of Medicine, University of Nottingham, Nottingham, UK
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30
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Latysheva NV, Platonova AS, Filatova EG. [Temporomandibular disorder and cervicalgia: pathophysiology underlying the comorbidity with chronic migraine]. Zh Nevrol Psikhiatr Im S S Korsakova 2019; 119:17-22. [PMID: 30778026 DOI: 10.17116/jnevro201911901117] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
AIM To analyze the prevalence of various clinical forms of temporomandibular disorder (TMD) and cervicalgia in episodic (EM) and chronic migraine (CM). MATERIAL AND METHODS Ninety patients with CM and 42 patients with EM as defined by the International Classification of Headache Disorders (ICHD)-3 beta were recruited. TMD and sleep bruxism were diagnosed according to the DC/TMD criteria and the International Classification of Sleep Disorders (ICSD-R), respectively. RESULTS Myofascial pain was the most prevalent form of TMD in both EM and CM. The prevalence of TMD was higher in CM as compared to EM (60% vs. 21.4%, respectively, p=0.0001). The prevalence of bruxism was comparable across EM and CM (14.3% vs. 28.8%, respectively, p=0.08) and significantly lower than that of TMD in the CM population (28.8% vs. 60%, respectively, p=0.0001). Frequent cervicalgia (≥15 days per month) was reported by 65.5% and 21.4% of CM and EM patients, respectively (p=0.0001); 44.4% of CM patients reported neck pain immediately before or during migraine attacks only, 14.4% during the headache and interictal phases. CONCLUSION The higher prevalence of pain-related TMD and cervicalgia in CM population compared to EM and the general population was shown. In CM, myofascial pain and tenderness in the masticatory and neck muscles may be caused by central sensitization (CS) with no link to temporomandibular joint or spinal pathology. Myofascial TMD and neck muscle dysfunction are an integral part of CM pathophysiology underlying headache chronification.
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Affiliation(s)
- N V Latysheva
- Sechenov First Moscow State Medical University, Moscow, Russia
| | | | - E G Filatova
- Sechenov First Moscow State Medical University, Moscow, Russia
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Nystrom NA, Freeman MD. Central Sensitization Is Modulated Following Trigger Point Anesthetization in Patients with Chronic Pain from Whiplash Trauma. A Double-Blind, Placebo-Controlled, Crossover Study. Pain Med 2019; 19:124-129. [PMID: 28419379 DOI: 10.1093/pm/pnx014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Objective Central sensitization (CS) with low peripheral pain thresholds (PPTs) is a common finding among patients with chronic pain after whiplash (CPWI). While it has been proposed that myofascial myofascial trigger points (MTrPs) may act as modulators of central sensitization, previously reported findings are conflicting and inconclusive. The present study was designed to investigate immediate responsiveness of CS to alterations in nociceptive input. Design Controlled, double-blind, cross-over. Subjects Thirty-one patients with chronic pain (trapezius myalgia) and CS after whiplash. Methods Participants were referred by randomization to group A for injection of a single peripheral pain generator (MTrP or other discrete tender point) with local anesthetic or to group B for sham injection and cross-over. Documentation of PPT (Algometer), maximum jaw opening (caliper), and grip strength (Vigorimeter), as well as subjective overall pain (visual analog scale [VAS]), was made before and after each intervention. Results Statistical analysis of data (Student's t test, analysis of variance) confirmed that peripheral pain thresholds were significantly higher and maximum jaw opening significantly greater after anesthetizing a focal pain generator in the trapezius, but not after a sham injection. In contrast with the objective variables, subjective generalized pain improved (VAS) after not only an injection of local anesthetic, but also, and to a similar extent, after a sham injection. Conclusions CS, as expressed by lowered PPT, is a rapidly adjusting physiological response to nociceptive stimuli in some patients with chronic pain after whiplash. PPT are likely modulated by myofascial tender points in selected patients with CS. With reference to the present findings, surgical ablation of MTrPs is discussed as a potential treatment modality for CS.
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Affiliation(s)
- N Ake Nystrom
- Department of Hand and Plastic Surgery, Stavanger University Hospital, Stavanger, Norway
| | - Michael D Freeman
- Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, the Netherlands
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Dommerholt J, Hooks T, Chou LW, Finnegan M. A critical overview of the current myofascial pain literature - November 2018. J Bodyw Mov Ther 2018; 23:65-73. [PMID: 30691765 DOI: 10.1016/j.jbmt.2018.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 11/13/2018] [Indexed: 02/01/2023]
Abstract
This is the first issue of this review column since the passing of Dr. Leon Chaitow. We would like to take a brief moment to acknowledge how much his mentorship, friendship, and confidence have meant to us. Leon was a force in osteopathic and naturopathic medicine and his influence reaches to all corners of the musculoskeletal realm crossing over many disciplines through his lectures, workshops, and of course, his many books, editorials, and articles. In the foreword to one of his books, Jan Dommerholt wrote that "Leon Chaitow […] continued the work of Travell and Simons, but also of many others, whose contributions he has skillfully woven into an intricate tapestry of clinical pearls, practical tips, and solid evidence-informed research." Dr. Chaitow was a synthesizer, who always considered what different clinicians and researchers could possibly contribute to a better understanding of pain and dysfunction and provide real solutions to real problems. Even when he would not necessarily agree with all suggested remedies, he maintained an open mind and was able to take a step back and consider the bigger picture. For example, Leon was not a big fan of dry needling, yet, he valued the importance of this approach and encouraged the inclusion of dry needling papers in this review article and in his journal. The Journal of Bodywork and Movement Therapies became his baby and, considering the growth of the journal, there is no question that Leon's intense focus and efforts are appreciated by many around the globe. We wish to extend our condolences to Leon's wife Alkmini and daughter Sasha. He will surely be missed, but we can find peace in knowing that his legacy will stay with us forever. In this issue, we have included several basic myofascial pain research articles. As usual, dry needling (DN) studies and case reports are the most commonly referenced papers, but we also included neuroscience and electromyography studies, sleep studies, interrater reliability studies, and case reports of adverse events.
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Affiliation(s)
- Jan Dommerholt
- Bethesda Physiocare, Bethesda, MD, USA; Myopain Seminars, Bethesda, MD, USA.
| | - Todd Hooks
- New Orleans Pelicans, New Orleans, LA, USA; Myopain Seminars, Bethesda, MD, USA.
| | | | - Michelle Finnegan
- Myopain Seminars, Bethesda, MD, USA; ProMove PT Pain Specialists, Bethesda, MD, USA.
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Alqarni A, Manlapaz D, Baxter D, Tumilty S, Mani R. Test procedures to assess somatosensory abnormalities in individuals with neck pain: a systematic review of psychometric properties. Physical Therapy Reviews 2018. [DOI: 10.1080/10833196.2018.1512737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Abdullah Alqarni
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - Donald Manlapaz
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - David Baxter
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - Steve Tumilty
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - Ramakrishnan Mani
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
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Shaked D, Shaked G, Sebbag G, Czeiger D. Can cortisol levels predict the severity of acute whiplash-associated disorders? Eur J Trauma Emerg Surg 2020; 46:357-62. [DOI: 10.1007/s00068-018-1028-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 10/08/2018] [Indexed: 02/06/2023]
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Greening J, Anantharaman K, Young R, Dilley A. Evidence for Increased Magnetic Resonance Imaging Signal Intensity and Morphological Changes in the Brachial Plexus and Median Nerves of Patients With Chronic Arm and Neck Pain Following Whiplash Injury. J Orthop Sports Phys Ther 2018; 48:523-32. [PMID: 29690828 DOI: 10.2519/jospt.2018.7875] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background Whiplash following a motor vehicle accident can result in chronic neck and arm pain. Patients frequently present with cutaneous hypersensitivities and hypoesthesia, but without obvious clinical signs of nerve injury. T2-weighted magnetic resonance imaging (MRI) has previously been used to identify nerve pathology. Objectives To determine whether there are signs of peripheral nerve pathology on MRI in patients with chronic arm and neck pain following whiplash injury. Methods This cross-sectional study used T2-weighted MRI to examine the brachial plexus and median nerve in patients and age-matched, healthy control subjects. Clinical examination included tests of plexus and nerve trunk mechanical sensitivity. Results The T2 signal intensity was greater in the brachial plexus and median nerve at the wrist in the patient group (mean intensity ratio = 0.52 ± 0.13 and 2.09 ± 0.33, respectively) compared to the control group (mean intensity ratio = 0.45 ± 0.07 and 1.38 ± 0.31, respectively; P<.05). Changes in median nerve morphology were also observed, which included an enlargement (mean area: patient group, 8.05 ± 1.29 mm2; control group, 6.52 ± 1.08 mm2; P<.05) and flattening (mean aspect ratio: patient group, 2.46 ± 0.53; control group, 1.62 ± 0.30; P<.05) at the proximal carpal row. All patients demonstrated signs of nerve trunk mechanical sensitivity. Conclusion These findings suggest that patients with chronic whiplash may have inflammatory changes and/or mild neuropathy, which may contribute to symptoms. J Orthop Sports Phys Ther 2018;48(7):523-532. Epub 24 Apr 2018. doi:10.2519/jospt.2018.7875.
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Hwang C, Van Dillen LR, Haroutounian S. Do Changes in Sensory Processing Precede Low Back Pain Development in Healthy Individuals? Clin J Pain 2018; 34:525-31. [DOI: 10.1097/ajp.0000000000000563] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Lee YH, Lee KM, Auh QS, Hong JP. Magnetic Resonance Imaging-Based Prediction of the Relationship between Whiplash Injury and Temporomandibular Disorders. Front Neurol 2018; 8:725. [PMID: 29375466 PMCID: PMC5767220 DOI: 10.3389/fneur.2017.00725] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 12/14/2017] [Indexed: 01/03/2023] Open
Abstract
Purpose Whiplash injury can cause internal derangement of the temporomandibular joint (TMJ) and lead to temporomandibular disorders (TMDs). Our aim was to evaluate whether the initial clinical findings in TMD patients with whiplash injury are correlated with their magnetic resonance imaging (MRI) characteristics. Materials and methods This case–control study involved 219 patients (135 women, 84 men; mean age: 37.84 years) who visited our orofacial pain clinic with TMD; TMD was diagnosed using the diagnostic criteria for TMD Axis I. Patients were categorized into three groups based on the presence and type of macrotrauma: in the “wTMD” group, patients had suffered whiplash injury; patients in the “pTMD” group had post-traumatic TMD; the “iTMD” group comprised patients who had presented with TMD symptoms and had sustained no macrotrauma. We investigated the presence of disk displacement, effusion, disk deformity, and condylar degeneration, and changes in the lateral pterygoid muscle (LPM). To evaluate the severity of TMD pain and objectively analyze symptoms, we used a visual analog scale (VAS), palpation index (PI), neck PI, dysfunction index, and craniomandibular index (CMI). Results The VAS scores, and the severity indexes of the TMD including PI, neck PI, and CMI were highest in the wTMD patients. Atrophy of the LPM was most commonly seen in the wTMD group, as was disk deformity. In wTMD patients only, VAS score was significantly correlated with stress; it was correlated with headache in wTMD and iTMD patients. The clinical symptoms of TMD were not correlated with MRI findings in the wTMD group. However, alterations in the LPM were strongly correlated with disk displacement. Conclusion If clinicians recognize alterations in the LPM and disk displacement in the TMJ, they will better understand the clinical symptoms and pathophysiology of TMD with whiplash injury. Whiplash injury may lead to TMD via different mechanisms from other macrotraumas.
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Affiliation(s)
- Yeon-Hee Lee
- Orofacial Pain and Oral Medicine, Kyung Hee University Dental Hospital, Seoul, South Korea
| | - Kyung Mi Lee
- Radiology, Kyung Hee University College of Medicine, Kyung Hee University Hospital, Seoul, South Korea
| | - Q-Schick Auh
- Orofacial Pain and Oral Medicine, Kyung Hee University Dental Hospital, Seoul, South Korea
| | - Jyung-Pyo Hong
- Orofacial Pain and Oral Medicine, Kyung Hee University Dental Hospital, Seoul, South Korea
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Malo-Urriés M, Hidalgo-García C, Estébanez-de-Miguel E, Tricás-Moreno JM, Santos-Lasaosa S, Jahanshahi M. Sensory function in cluster headache: an observational study comparing the symptomatic and asymptomatic sides. Neuropsychiatr Dis Treat 2018; 14:3363-3371. [PMID: 30573960 PMCID: PMC6292232 DOI: 10.2147/ndt.s186051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Based on inconsistent sensory alterations demonstrated in cluster headache (CH), the aim of this study was to determine whether patients with CH develop sensory changes in the symptomatic side compared to the asymptomatic side. METHODS Quantitative sensory testing (QST), including pressure pain threshold (PPT), tactile detection threshold (TDT), prick detection threshold (PDT), and two-point detection threshold (2PDT), was evaluated in 16 patients (seven women; age 41.9±6.8 years) with CH. Test sites included the first, second, and third divisions of the trigeminal nerve, cervical spine, and thenar eminence in the symptomatic and asymptomatic sides. RESULTS The symptomatic side, compared to the asymptomatic side, presented significantly decreased PPT in the first (P=0.011; 423.81±174.05 kPa vs 480.13±214.99 kPa) and second (P=0.023; 288.88±140.80 kPa vs 326.38±137.33 kPa) divisions of the trigeminal nerve, significantly increased TDT in the first (P=0.002; 2.44±0.40 vs 1.74±0.24) and second (P=0.016; 1.92±0.34 vs 1.67±0.09) divisions, and increased 2PDT in the first division (P=0.004; 18.13±4.70 mm vs 15.0±4.92 mm) and neck (P=0.007; 45.31±20.65 mm vs 38.44±16.10 mm). CONCLUSION These results support the prior evidence suggesting a specific pattern of alteration of sensory function with alterations in the symptomatic side compared to the asymptomatic side.
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Affiliation(s)
- Miguel Malo-Urriés
- Physiotherapy Research Unit, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain,
| | - César Hidalgo-García
- Physiotherapy Research Unit, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain,
| | - Elena Estébanez-de-Miguel
- Physiotherapy Research Unit, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain,
| | - José Miguel Tricás-Moreno
- Physiotherapy Research Unit, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain,
| | | | - Marjan Jahanshahi
- Cognitive Motor Neuroscience Group, Department of Clinical and Movement Neurosciences, University College London Queen Square Institute of Neurology, The National Hospital for Neurology and Neurosurgery, London, UK
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Bossmann T, Brauner T, Horstmann T. Differences in pain intensity in anti- and pro-nociceptive pain profile subgroups in patients with knee osteoarthritis. Pain Manag 2018; 8:27-36. [DOI: 10.2217/pmt-2017-0039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Aim: Facilitated temporal summation is one component of central sensitization. The aim of this exploratory study was to classify pro-, eu- and antinociceptive subgroups based on wind-up ratio cut-off scores in patients with knee osteoarthritis (OA). Patients & methods: A total of 56 patients with knee OA met the inclusion criteria. Temporal summation was measured and wind-up ratio was calculated. Reference values of 180 healthy subjects were used to define wind-up ratio cut-off scores. Results: Twenty-seven percent of patients showed a pro-nociceptive pain profile. Sixteen percent of patients showed an anti-nociceptive pain profile. A eu-nociceptive pain profile was present in 57% of patients. Conclusion: Central pain sensitization was present in approximately a third of knee OA patients. The results should be confirmed in larger studies.
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Affiliation(s)
- Tanja Bossmann
- Department of Conservative & Rehabilitative Orthopaedics, Faculty of Sports & Health Sciences, Technical University of Munich, Germany
| | - Torsten Brauner
- Department of Conservative & Rehabilitative Orthopaedics, Faculty of Sports & Health Sciences, Technical University of Munich, Germany
| | - Thomas Horstmann
- Department of Conservative & Rehabilitative Orthopaedics, Faculty of Sports & Health Sciences, Technical University of Munich, Germany
- Medical Park Bad Wiessee, Klinik St. Hubertus, Bad Wiessee, Germany
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Noehren B, Shuping L, Jones A, Akers DA, Bush HM, Sluka KA. Somatosensory and Biomechanical Abnormalities in Females With Patellofemoral Pain. Clin J Pain 2016; 32:915-9. [PMID: 26626291 DOI: 10.1097/AJP.0000000000000331] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVES Chronic patellofemoral pain (PFP) is a common orthopedic condition for which little is understood of the alterations in pain processing such as hyperalgesia, hypoesthesia, and the relationship of altered knee mechanics to hyperalgesia. We assessed pain, pressure pain thresholds (PPT), detection to light touch, and the relationship of pain and PPTs to knee abduction angle during a stair step down task between females with and without PFP. MATERIALS AND METHODS Twenty females diagnosed with PFP and 20 age-matched pain-free females participated in this study. Individuals underwent an instrumented assessment of knee mechanics during a stair step down task, PPT and detection of light touch over the center of the patella and lateral retinaculum, and PPT outside painful area over the right elbow. RESULTS The PFP group had significantly lower PPT values at the patella (P=0.02), lateral retinaculum (P=0.001), and at the elbow (P=0.03). There was an elevated threshold to detect light touch over the center of their patella (P=0.04). A significant relationship between both pain (r=-0.49, P=0.03) and PPT values (r=0.65, P=0.004) to the frontal plane knee angle existed in the PFP group which was not present in the control group (r=-0.17, P=0.49) or in the elbow (r=-0.009, P=0.972). DISCUSSION These results suggest that PFP is characterized by an increase in both localized and centralized pain sensitivity that is related to movement mechanics. Thus, PFP has both biomechanical, nociceptive components as well as inferred aspects of altered central sensitization.
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Laursen K, Sehgal N, Poliak-Tunis M, Rudin NJ, Kim P. Regarding Modulation of Central Sensitization Following Trigger Point Anesthetization in Patients with Chronic Pain from Whiplash Trauma. Pain Medicine 2017; 19:815-816. [DOI: 10.1093/pm/pnx273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
| | | | | | | | - Peggy Kim
- Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
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Ita ME, Zhang S, Holsgrove TP, Kartha S, Winkelstein BA. The Physiological Basis of Cervical Facet-Mediated Persistent Pain: Basic Science and Clinical Challenges. J Orthop Sports Phys Ther 2017; 47:450-61. [PMID: 28622486 DOI: 10.2519/jospt.2017.7255] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Synopsis Chronic neck pain is a common condition and a primary clinical symptom of whiplash and other spinal injuries. Loading-induced neck injuries produce abnormal kinematics between the vertebrae, with the potential to injure facet joints and the afferent fibers that innervate the specific joint tissues, including the capsular ligament. Mechanoreceptive and nociceptive afferents that innervate the facet have their peripheral terminals in the capsule, cell bodies in the dorsal root ganglia, and terminal processes in the spinal cord. As such, biomechanical loading of these afferents can initiate nociceptive signaling in the peripheral and central nervous systems. Their activation depends on the local mechanical environment of the joint and encodes the neural processes that initiate pain and lead to its persistence. This commentary reviews the complex anatomical, biomechanical, and physiological consequences of facet-mediated whiplash injury and pain. The clinical presentation of facet-mediated pain is complex in its sensory and emotional components. Yet, human studies are limited in their ability to elucidate the physiological mechanisms by which abnormal facet loading leads to pain. Over the past decade, however, in vivo models of cervical facet injury that reproduce clinical pain symptoms have been developed and used to define the complicated and multifaceted electrophysiological, inflammatory, and nociceptive signaling cascades that are involved in the pathophysiology of whiplash facet pain. Integrating the whiplash-like mechanics in vivo and in vitro allows transmission of pathophysiological mechanisms across scales, with the hope of informing clinical management. Yet, despite these advances, many challenges remain. This commentary further describes and highlights such challenges. J Orthop Sports Phys Ther 2017;47(7):450-461. Epub 16 Jun 2017. doi:10.2519/jospt.2017.7255.
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Castaldo M, Catena A, Chiarotto A, Fernández-de-Las-Peñas C, Arendt-Nielsen L. Do Subjects with Whiplash-Associated Disorders Respond Differently in the Short-Term to Manual Therapy and Exercise than Those with Mechanical Neck Pain? Pain Med 2017; 18:791-803. [PMID: 28034987 DOI: 10.1093/pm/pnw266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Objective To compare the short-term effects of manual therapy and exercise on pain, related disability, range of motion, and pressure pain thresholds between subjects with mechanical neck pain and whiplash-associated disorders. Methods Twenty-two subjects with mechanical neck pain and 28 with whiplash-associated disorders participated. Clinical and physical outcomes including neck pain intensity, neck-related disability, and pain area, as well as cervical range of motion and pressure pain thresholds over the upper trapezius and tibialis anterior muscles, were obtained at baseline and after the intervention by a blinded assessor. Each subject received six sessions of manual therapy and specific neck exercises. Mixed-model repeated measures analyses of covariance (ANCOVAs) were used for the analyses. Results Subjects with whiplash-associated disorders exhibited higher neck-related disability ( P = 0.021), larger pain area ( P = 0.003), and lower pressure pain thresholds in the tibialis anterior muscle ( P = 0.009) than those with mechanical neck pain. The adjusted ANCOVA revealed no between-group differences for any outcome (all P > 0.15). A significant main effect of time was demonstrated for clinical outcomes and cervical range of motion with both groups experiencing similar improvements (all P < 0.01). No changes in pressure pain thresholds were observed in either group after treatment ( P > 0.222). Conclusions The current clinical trial found that subjects with mechanical neck pain and whiplash-associated disorders exhibited similar clinical and neurophysiological responses after a multimodal physical therapy intervention, suggesting that although greater signs of central sensitization are present in subjects with whiplash-associated disorders, this does not alter the response in the short term to manual therapy and exercises.
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Affiliation(s)
- Matteo Castaldo
- Private practice, Poliambulatorio FisioCenter, Collecchio, Parma, Italy.,SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark.,Department of Physical Therapy, University of Siena, Siena, Italy
| | - Antonella Catena
- Private practice, Poliambulatorio FisioCenter, Collecchio, Parma, Italy
| | - Alessandro Chiarotto
- Department of Health Sciences, Faculty of Earth and Life Sciences, EMGO+ Institute for Health and Care Research, VU University, Amsterdam, The Netherlands
| | - César Fernández-de-Las-Peñas
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark.,Department of Physical Therapy, Occupational Therapy, Physical Medicine and Rehabilitation, Universidad Rey Juan Carlos, Alcorcón, Spain
| | - Lars Arendt-Nielsen
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
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Dargie E, Gilron I, Pukall CF. Self-Reported Neuropathic Pain Characteristics of Women With Provoked Vulvar Pain: A Preliminary Investigation. J Sex Med 2017; 14:577-591. [PMID: 28325536 DOI: 10.1016/j.jsxm.2017.02.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 02/08/2017] [Accepted: 02/19/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND Provoked vestibulodynia (PVD) is a common chronic genital pain condition affecting approximately 12% of premenopausal women. Although parallels have been drawn between PVD and neuropathic pain (NP), no studies have examined self-reported NP characteristics in PVD. AIM To explore pain symptoms that resemble NP reported by those with PVD and compare responses with those with an established NP condition. METHODS Women with provoked vulvar pain (PVP; n = 65) completed online questionnaires designed to assess characteristics of NP. Responses were compared with those of women with postherpetic neuralgia (PHN; n = 30). OUTCOMES In addition to a range of descriptive questions, participants completed the McGill Pain Questionnaire, the Self-Complete Leeds Assessment of Neuropathic Signs and Symptoms (S-LANSS), the Neuropathic Pain Symptom Inventory (NPSI), and the Pain Quality Assessment Scale (PQAS). RESULTS PVP exhibits some neuropathic characteristics, typically evoked pain (as opposed to the more constant pain of PHN) indicative of allodynia and hyperalgesia. Specifically, women with PVP scored, on average, higher than the NP cutoff on the S-LANSS, and there were no significant differences between women with PVP and those with PHN on some NPSI subscales. However, women with PHN reported more NP symptoms on the PQAS, S-LANSS, and other NPSI subscales. CLINICAL IMPLICATIONS Validated NP questionnaires could be of particular use for health care professionals who need a more efficient way to assess symptoms of patients with PVP and should be included in future studies investigating the mechanisms and treatment of this pain. STRENGTHS AND LIMITATIONS This study takes a unique approach to the examination of PVP by using multiple validated NP measures to compare pain characteristics with those of a group of participants with PHN, an established NP condition. However, it is limited by self-reported data not confirmed with clinical examination, small size of the PHN group, and the severity of the pain experienced in the PVP group. CONCLUSION Women with PVP report some symptoms suggestive of NP characteristics, and future research should use NP measures in addition to physical examinations to further investigate the mechanisms that maintain this pain condition. Dargie E, Gilron I, Pukall CF. Self-Reported Neuropathic Pain Characteristics of Women With Provoked Vulvar Pain: A Preliminary Investigation. J Sex Med 2017;14:577-591.
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Affiliation(s)
- Emma Dargie
- Department of Psychology, Queen's University, Kingston, ON, Canada
| | - Ian Gilron
- Department of Anesthesiology and Perioperative Medicine, Queen's University, School of Medicine, Kingston, ON, Canada
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Manafi-Khanian B, Kjaer Petersen K, Arendt-Nielsen L. Tissue mechanics during temporal summation of sequentially cuff pressure-induced pain in healthy volunteers and patients with painful osteoarthritis. Eur J Pain 2017; 21:1051-1060. [PMID: 28182316 DOI: 10.1002/ejp.1006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2016] [Indexed: 11/11/2022]
Abstract
BACKGROUND The phenomenon of temporal summation to repetitive pressure pain stimuli is an important central neural mechanism for pain intensity encoding. This study evaluated the time-dependent behaviour of mechanical characteristics of soft tissue during repeated cuff stimulation used for eliciting temporal summation of cuff pressure-evoked pain. Such information of tissue mechanics is important for the interpretation of the pain response evoked during sequential stimulations. METHODS Temporal summation was assessed in 16 subjects separated into two groups (healthy controls and severe knee osteoarthritis patients) using a visual analogue scale during 10 repetitive painful cuff stimuli (1-s duration, 1-s break) of the lower leg. The geometry of the lower leg was constructed based on magnetic resonance image (MRI) data. The loading boundary condition of the finite element model was defined according to the parabolic pattern of the interface pressure around the limb and the time-dependent profile of the cuff pressure during repetitive stimuli. RESULTS The pain intensity significantly increased with an increasing number of stimuli (p < 0.001), and facilitated temporal summation of pain was observed in patients compared with healthy controls (p < 0.001). The maximal deep tissue stress and strain during stimuli 1-4 varied 43% and 9%, respectively. No variation was observed for stimuli 5-10. CONCLUSIONS The study concludes that the temporal summation of pain response during sequential cuff pressure is not explicable by a specific time-dependent behaviour of stress and strain in the activated deep tissue and hence not due to changes in tissue biomechanics. SIGNIFICANCE The temporal summation of pain during sequential cuff stimulation is inexplicable by the time-dependent response of mechanical stress and strain in soft tissue.
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Affiliation(s)
- B Manafi-Khanian
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark
| | - K Kjaer Petersen
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark
| | - L Arendt-Nielsen
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark
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López-de-Uralde-Villanueva I, Beltran-Alacreu H, Fernández-Carnero J, Gil-Martínez A, La Touche R. Differences in Neural Mechanosensitivity Between Patients with Chronic Nonspecific Neck Pain With and Without Neuropathic Features. A Descriptive Cross-Sectional Study. Pain Med 2016; 17:136-48. [PMID: 26179341 DOI: 10.1111/pme.12856] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 06/02/2015] [Accepted: 06/10/2015] [Indexed: 01/22/2023]
Abstract
OBJECTIVE To assess differences in neural mechanosensitivity between patients with chronic nonspecific neck pain with and without neuropathic features (NF and No-NF, respectively). DESIGN Descriptive, cross-sectional study. SETTING A primary care center, a hospital physiotherapy outpatient department, and a university campus. SUBJECTS Chronic nonspecific neck pain patients classified by the self-completed leeds assessment of neuropathic symptoms and signs pain scale (S-LANSS; 49 patients with NF [S-LANSS ≥ 12] and 50 patients with No-NF [S-LANSS < 12]) and a healthy control group (n = 48). METHODS The primary measurements were the mechanosensitivity of the median nerve and cervical region, specifically the assessment of the onset of symptoms and submaximal pain intensity according to the upper limb neural test 1 (ULNT1) for the median nerve and the modified passive neck flexion test (MPNFT) for the cervical region; secondary measurements included pain intensity, neck disability, kinesiophobia, and pain catastrophizing. RESULTS Statistically significant differences between the NF and No-NF groups were found with respect to the onset of symptoms of ULNT1 (-15.11 [-23.19 to -7.03]) and MPNFT (-6.58 [-11.54 to -1.62]), as well as the outcomes of the visual analogue scale (Mean difference [95% Confidence Interval]; 7.12 [1.81-12.42]) and neck disability index (3.72 [1.72-5.71]). Both chronic nonspecific neck pain groups showed statistically significant differences compared with the control group for all outcomes assessed (P < 0.01) except for the onset of symptoms of ULNT1 in the No-NF group. CONCLUSIONS The findings of this study suggest that chronic nonspecific neck pain patients with NF have greater neural mechanosensitivity, pain intensity, and neck disability than those with No-NF.
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Ayesh E, Jensen T, Svensson P. Hypersensitivity to Mechanical and Intra-articular Electrical Stimuli in Persons with Painful Temporomandibular Joints. J Dent Res 2016; 86:1187-92. [DOI: 10.1177/154405910708601209] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This study tested whether persons with TMJ arthralgia have a modality-specific and site-specific hypersensitivity to somatosensory stimuli assessed by quantitative sensory tests (QST). Forty-three healthy persons and 20 with TMJ arthralgia participated. The QST consisted of: sensory and pain detection thresholds and summation threshold to intra-articular electrical stimulation, tactile and pin-prick sensitivity in the TMJ area, pressure-pain threshold and tolerance on the lateral side of the TMJ and on the finger. Persons with TMJ arthralgia had lower pain detection and summation thresholds (P < 0.001), higher ratings of tactile and pin-prick stimuli (P < 0.05), and markedly lower pressure thresholds on the TMJ and finger (P <0.001) than did healthy individuals. Correlation analysis revealed associations between several QST and clinical pain measures. This study provides new evidence of sensitization of the TMJs as well as central nociceptive pathways. QST may facilitate a mechanism-based classification of temporomandibular disorders.
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Affiliation(s)
- E.E. Ayesh
- Department of Clinical Oral Physiology, School of Dentistry, University of Aarhus, Vennelyst Boulevard 9, DK-8000 Aarhus C, Denmark
- Department of Neurology and
- Department of Oral Maxillofacial Surgery, Aarhus University Hospital, Denmark; and
- Center for Sensory Motor Interaction, Aalborg University, Denmark
| | - T.S. Jensen
- Department of Clinical Oral Physiology, School of Dentistry, University of Aarhus, Vennelyst Boulevard 9, DK-8000 Aarhus C, Denmark
- Department of Neurology and
- Department of Oral Maxillofacial Surgery, Aarhus University Hospital, Denmark; and
- Center for Sensory Motor Interaction, Aalborg University, Denmark
| | - P. Svensson
- Department of Clinical Oral Physiology, School of Dentistry, University of Aarhus, Vennelyst Boulevard 9, DK-8000 Aarhus C, Denmark
- Department of Neurology and
- Department of Oral Maxillofacial Surgery, Aarhus University Hospital, Denmark; and
- Center for Sensory Motor Interaction, Aalborg University, Denmark
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Moon JJ, Ahn MW, Ahn HS, Lee SJ, Lee DY. Usefulness of K-Point Injection for the Nonspecific Neck Pain in So-Called K-Point Syndrome. Clin Orthop Surg 2016; 8:393-398. [PMID: 27904721 PMCID: PMC5114251 DOI: 10.4055/cios.2016.8.4.393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 06/08/2016] [Indexed: 12/02/2022] Open
Abstract
Background Shoichi Kokubun introduced his successful experience with local anesthetic injection at the occipital insertion of the sternocleidomastoid muscle in K-point syndrome. The purpose of this study was to evaluate the short-term and long-term effectiveness of K-point injection and investigate factors affecting treatment results. Methods K-point injection was performed in 58 patients with K-point syndrome at Yeungnam University Medical Center. The syndrome was associated with cervical whiplash injury in 10 patients and was of nonspecific origin in the rest. One milliliter of 2% lidocaine mixed with 1 milliliter of dexamethasone was injected in 50 patients and 2 milliliters of 1% lidocaine alone in the rest. Initially, the severity of local tenderness at the K-point and other tender points was examined and the degree of immediate pain relief effect was assessed within 1 hour after injection. Early effect within 1 month after the injection and current effect were evaluated in 27 patients using a modified Kim's questionnaire with regard to the duration of improvement, degree of improvement in pain and daily living activities, and satisfaction. Results Of the total 58 patients, 44 (75.8%) apparently had immediate pain relief after K-point injection. The only factor associated with successful immediate pain relief was the whiplash injury associated with traffic accident (TA). The early pain control effect was associated with the immediate effect. The current effect was associated with the early effect alone. Satisfaction with the K-point injection was related to early successful pain relief. Conclusions K-point injection would be useful for early pain relief in nonspecific neck pain syndrome so called K-point syndrome, but not for current pain relief. Especially, it was very effective for early pain control in the whiplash injury associated with TA.
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Affiliation(s)
- Jeong Jae Moon
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea
| | - Myun Whan Ahn
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea
| | - Hyo Sae Ahn
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea
| | - Sung Jun Lee
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea
| | - Dong Yeol Lee
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea
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Ris I, Juul-Kristensen B, Boyle E, Kongsted A, Manniche C, Søgaard K. Chronic neck pain patients with traumatic or non-traumatic onset: Differences in characteristics. A cross-sectional study. Scand J Pain 2017; 14:1-8. [PMID: 28850421 DOI: 10.1016/j.sjpain.2016.08.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/23/2016] [Accepted: 08/27/2016] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Patients with chronic neck pain can present with disability, low quality of life, psychological factors and clinical symptoms. It is unclear whether patients with a traumatic onset differ from those with a non-traumatic onset, by having more complex and severe symptoms. The purpose of this study was to investigate the clinical presentation of chronic neck pain patients with and without traumatic onset by examining cervical mobility, sensorimotor function, cervical muscle performance and pressure pain threshold in addition to the following self-reported characteristics: quality of life, neck pain and function, kinesiophobia, depression, and pain bothersomeness. METHODS This cross-sectional study included 200 participants with chronic neck pain: 120 with traumatic onset and 80 with non-traumatic onset. Participants were recruited from physiotherapy clinics in primary and secondary health care. For participants to be included, they were required to be at least 18 years of age, have had neck pain for at least 6 months, and experienced neck-related activity limitation as determined by a score of at least 10 on the Neck Disability Index. We conducted the following clinical tests of cervical range of motion, gaze stability, eye movement, cranio-cervical flexion, cervical extensors, and pressure pain threshold. The participants completed the following questionnaires: physical and mental component summary of the Short Form Health Survey, EuroQol-5D, Neck Disability Index, Patient-Specific Functional Scale, Pain Bothersomeness, Beck Depression Inventory-II, and TAMPA scale of kinesiophobia. The level of significance for all analyses was defined as p<0.01. Differences between groups for the continuous data were determined using either a Student's t-test or Mann Whitney U test. RESULTS In both groups, the majority of the participants were female (approximately 75%). Age, educational level, working situation and sleeping patterns were similar in both groups. The traumatic group had symptoms for a shorter duration (88 vs. 138 months p=0.001). Participants in the traumatic group showed worse results on all measures compared with those in the non-traumatic group, significantly on neck muscle function (cervical extension mobility p=0.005, cranio-cervical flexion test p=0.007, cervical extensor test p=0.006) and cervical pressure pain threshold bilateral (p=0.002/0.004), as well on self-reported function (Neck Disability Index p=0.001 and Patient-Specific Functional Scale p=0.007), mental quality of life (mental component summary of the Short Form Health Survey p=0.004 and EuroQol-5D p=0.001) and depression (Beck Depression Inventory-II p=0.001). CONCLUSIONS This study showed significant differences between chronic neck pain patients when differentiated into groups based on their onset of pain. However, no specific clinical test or self-reported characteristic could differentiate between the groups at an individual patient level. IMPLICATIONS Pressure pain threshold tests, cervical muscle performance tests and patient-reported characteristics about self-perceived function and psychological factors may assist in profiling chronic neck pain patients. The need for more intensive management of those with a traumatic onset compared with those with a non-traumatic onset should be examined further.
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Abstract
Synopsis Whiplash-associated disorder (WAD) is a group of symptoms and clinical manifestations resulting from rear-end or side impact. Despite the wide use of medications in WAD, the published research does not allow recommendations based on high evidence level. It may be meaningful to use nonsteroidal anti-inflammatory drugs in the acute posttraumatic phase. In chronic WAD, the use of nonsteroidal anti-inflammatory drugs is more concerning due to potential gastrointestinal and renal complications with prolonged use and lack of evidence for long-term benefits. Antidepressants can be used in patients with clinically relevant hyperalgesia, sleep disorder associated with pain, or depression. Anticonvulsants are unlikely first-choice medications, but can be considered if other treatments fail. The use of opioids in patients with chronic pain has become the object of severe concern, due to the lack of evidence for long-term benefits and the associated risks. Extreme caution in prescribing and monitoring opioid treatment is mandatory. Nerve blocks of the zygapophyseal (facet) joints have validity for the diagnosis of facet joint pain, which is one of the possible manifestations of WAD. One randomized sham-controlled trial and several high-quality prospective studies support the efficacy of radiofrequency neurotomy for the treatment of facet joint pain. The efficacy of trigger point treatments is uncertain. They can be offered due to possible efficacy and limited risks. Any medication or procedure has to be considered in the frame of a comprehensive patient evaluation. As for any chronic pain condition, concomitant consideration of rehabilitation and psychosocial interventions is mandatory. J Orthop Sports Phys Ther 2016;46(10):845-850. Epub 3 Sep 2016. doi:10.2519/jospt.2016.6906.
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