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Warzocha J, Gadomska-Krasny J, Mrowiec J. Etiologic Factors of Temporomandibular Disorders: A Systematic Review of Literature Containing Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) and Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) from 2018 to 2022. Healthcare (Basel) 2024; 12:575. [PMID: 38470686 PMCID: PMC10931313 DOI: 10.3390/healthcare12050575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/17/2024] [Accepted: 02/25/2024] [Indexed: 03/14/2024] Open
Abstract
This study aims to conduct a systematic analysis of literature published between 1 January 2018 and 1 September 2022, exploring factors influencing the progression or development of temporomandibular disorders (TMD), diagnosed using the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) or Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). Three electronic databases were reviewed to identify papers that examined TMD factors using DC/TMD or RDC/TMD. Inclusion criteria encompassed original research published in English between 1 January 2018 and 1 October 2022, online, and complete DC/TMD or RDC/TMD studies on human participants aged 18 or older. Two authors independently assessed the risk of bias using The Joanna Briggs Institute (JBI) Analytical cross-sectional studies' Critical Appraisal Tool. Of 1478 articles, 11 were included. The studies revealed strong associations between TMD and factors such as female, poor sleep quality, depression, oral parafunction, anxiety, somatization, and anatomical features. However, variables such as education, living conditions, socioeconomic status, marital status, chronic pain, and stress did not exhibit statistically significant correlations. Based on the obtained data, it can be concluded that the causes of TMD are largely related to psychological factors, which supports the biopsychosocial theory of the disorder.
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Affiliation(s)
- Joanna Warzocha
- Faculty of Medicine, Lazarski University, Świeradowska 43, 02-662 Warszawa, Poland
| | | | - Joanna Mrowiec
- SCS Astermed-Centrum Ortodontyczno-Implantologiczne, Świętego Bonifacego 92, 02-940 Warszawa, Poland
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Chweidan H, Rudyuk N, Tzur D, Goldstein C, Almoznino G. Statistical Methods and Machine Learning Algorithms for Investigating Metabolic Syndrome in Temporomandibular Disorders: A Nationwide Study. Bioengineering (Basel) 2024; 11:134. [PMID: 38391620 PMCID: PMC10886027 DOI: 10.3390/bioengineering11020134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 02/24/2024] Open
Abstract
The objective of this study was to analyze the associations between temporomandibular disorders (TMDs) and metabolic syndrome (MetS) components, consequences, and related conditions. This research analyzed data from the Dental, Oral, Medical Epidemiological (DOME) records-based study which integrated comprehensive socio-demographic, medical, and dental databases from a nationwide sample of dental attendees aged 18-50 years at military dental clinics for 1 year. Statistical and machine learning models were performed with TMDs as the dependent variable. The independent variables included age, sex, smoking, each of the MetS components, and consequences and related conditions, including hypertension, hyperlipidemia, diabetes, impaired glucose tolerance (IGT), obesity, cardiac disease, obstructive sleep apnea (OSA), nonalcoholic fatty liver disease (NAFLD), transient ischemic attack (TIA), stroke, deep venous thrombosis (DVT), and anemia. The study included 132,529 subjects, of which 1899 (1.43%) had been diagnosed with TMDs. The following parameters retained a statistically significant positive association with TMDs in the multivariable binary logistic regression analysis: female sex [OR = 2.65 (2.41-2.93)], anemia [OR = 1.69 (1.48-1.93)], and age [OR = 1.07 (1.06-1.08)]. Features importance generated by the XGBoost machine learning algorithm ranked the significance of the features with TMDs (the target variable) as follows: sex was ranked first followed by age (second), anemia (third), hypertension (fourth), and smoking (fifth). Metabolic morbidity and anemia should be included in the systemic evaluation of TMD patients.
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Affiliation(s)
- Harry Chweidan
- Department of Prosthodontics, Oral and Maxillofacial Center, Israel Defense Forces, Medical Corps, Tel-Hashomer, Ramat Gan 02149, Israel
| | - Nikolay Rudyuk
- Department of Prosthodontics, Oral and Maxillofacial Center, Israel Defense Forces, Medical Corps, Tel-Hashomer, Ramat Gan 02149, Israel
| | - Dorit Tzur
- Medical Information Department, General Surgeon Headquarters, Israel Defense Forces, Medical Corps, Tel-Hashomer, Ramat Gan 02149, Israel
| | - Chen Goldstein
- Big Biomedical Data Research Laboratory, Dean's Office, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Galit Almoznino
- Big Biomedical Data Research Laboratory, Dean's Office, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 91120, Israel
- Department of Oral Medicine, Sedation & Maxillofacial Imaging, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 91120, Israel
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Wang W, Lu X, Li Q, Chen D, Zeng W. The Relationship between Blood Lead Level and Chronic Pain in US Adults: A Nationwide Cross-Sectional Study. Pain Ther 2023; 12:1195-1208. [PMID: 37391620 PMCID: PMC10444925 DOI: 10.1007/s40122-023-00535-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 06/12/2023] [Indexed: 07/02/2023] Open
Abstract
INTRODUCTION Lead toxicity has been a major public health problem worldwide, yet no study has investigated the association between lead exposure and chronic pain. METHODS We used data from three cycles of National Health and Nutrition Examination Survey (NHANES) with chronic pain status. We conducted univariate and multivariate logistic regression analyses to investigate the association between chronic pain and blood lead level (BLL). Subgroup analyses were performed to explore which confounding factor modified the association between chronic pain and BLL. RESULTS A total of 13,485 participants were included in our final analysis, out of which 1950 (14.46%) had chronic pain. In the fully adjusted model, a 1 μg/dL increase of BLL was associated with 3% higher risk of chronic pain. The highest BLL quartile (BLL > 2.40 μg/dL) was associated with a 32% increase in the risk of chronic pain compared with the lowest BLL quartile (BLL < 0.90 μg/dL). In the subgroup analyses, hypertension (P for interaction = 0.018) and arthritis (P for interaction = 0.004) status modified the association between BLL and chronic pain. Higher quartiles of BLL were associated with a higher risk of chronic pain only in individuals with hypertension or arthritis but not those without these conditions. CONCLUSION A higher BLL was associated with a higher risk of chronic pain. Further research is warranted to investigate whether a causal relationship exists between the two, as well as potential underlying mechanisms.
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Affiliation(s)
- Wanyu Wang
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 510060, Guangzhou, Guangdong, China
| | - Xiaoyun Lu
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 510060, Guangzhou, Guangdong, China
| | - Qiang Li
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 510060, Guangzhou, Guangdong, China
| | - Dongtai Chen
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 510060, Guangzhou, Guangdong, China.
| | - Weian Zeng
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 510060, Guangzhou, Guangdong, China.
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Suri P, Elgaeva EE, Williams FMK, Freidin MB, Zaytseva OO, Aulchenko YS, Tsepilov YA. Evidence of causal effects of blood pressure on back pain and back pain on type II diabetes provided by a bidirectional Mendelian randomization study. Spine J 2023; 23:1161-1171. [PMID: 37061135 DOI: 10.1016/j.spinee.2023.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 03/01/2023] [Accepted: 04/07/2023] [Indexed: 04/17/2023]
Abstract
BACKGROUND CONTEXT Cardiovascular risk factors (hypertension, dyslipidemia, and type II diabetes) have been proposed as risk factors for back pain. However, few longitudinal studies have found significant associations between cardiovascular risk factors and back pain, and these may be explained by confounding or reverse causation. PURPOSE To examine potential causal effects of cardiovascular risk factors on back pain, and vice versa. STUDY DESIGN Bidirectional Mendelian randomization (MR) study. PATIENT SAMPLES Genome-wide association studies (GWAS) with sample sizes between 173,082 and 1,028,947 participants. OUTCOME MEASURES Outcomes included (1) back pain associated with health care use (BP-HC) in the forward MR; and (2) seven cardiovascular phenotypes in the reverse MR, including 2 measurements used for the evaluation of hypertension (diastolic blood pressure and systolic blood pressure), 4 phenotypes related to dyslipidemia (LDL cholesterol, HDL cholesterol, total cholesterol, and triglycerides), and type II diabetes. METHODS We used summary statistics from large, publicly available GWAS for BP-HC and the 7 cardiovascular phenotypes to obtain genetic instrumental variables. We examined MR evidence for causal associations using inverse-variance weighted (IVW) analysis, Causal Analysis Using Summary Effect (CAUSE), and sensitivity analyses. RESULTS In forward MR analyses of seven cardiovascular phenotypes, diastolic blood pressure was associated with BP-HC across all analyses (IVW estimate: OR = 1.10 per 10.5 mm Hg increase [1.04-1.17], p-value = .001), and significant associations of systolic blood pressure with BP-HC were also found (IVW estimate: OR = 1.09 per 19.3 mm Hg increase [1.04-1.15], p-value = .0006). In reverse MR analyses, only type II diabetes was associated with BP-HC across all analyses (IVW estimate: OR = 1.40 [1.13-1.73], p-value = .002). CONCLUSIONS These findings from analyses of large, population-based samples indicate that higher blood pressure increases the risk of BP-HC, and BP-HC itself increases the risk of type II diabetes.
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Affiliation(s)
- Pradeep Suri
- Division of Rehabilitation Care Services, VA Puget Sound Health Care System, 1660 S. Columbian Way, 98108, Seattle, USA; Seattle Epidemiologic Research and Information Center, VA Puget Sound Health Care System, 1660 S. Columbian Way, 98108, Seattle, USA; Department of Rehabilitation Medicine, University of Washington, 325 Ninth Avenue, 98104, Seattle, USA; Clinical Learning, Evidence, and Research (CLEAR) Center, University of Washington, 325 Ninth Avenue, 98104, Seattle, USA.
| | - Elizaveta E Elgaeva
- Department of Natural Sciences, Novosibirsk State University, Pirogova Street 2, 630090,Novosibirsk, Russia; Laboratory of Recombination and Segregation Analysis, Institute of Cytology and Genetics, 630090, Novosibirsk, Russia
| | - Frances M K Williams
- Department of Twin Research and Genetic Epidemiology, School of Life Course Sciences, King's College London, Westminster Bridge Road, London, UK
| | - Maxim B Freidin
- Department of Biology, School of Biological and Behavioural Sciences, Queen Mary University of London, Fogg Buliding, Mile End Road, London, UK
| | - Olga O Zaytseva
- Genos Glycoscience Research Laboratory, Borongajska cesta 83H, 10000, Zagreb, Croatia
| | - Yurii S Aulchenko
- Laboratory of Recombination and Segregation Analysis, Institute of Cytology and Genetics, 630090, Novosibirsk, Russia; PolyOmica, Het Vlaggeschip 61, 5237 PA, 's-Hertogenbosch, the Netherlands
| | - Yakov A Tsepilov
- Laboratory of Recombination and Segregation Analysis, Institute of Cytology and Genetics, 630090, Novosibirsk, Russia; Kurchatov Genomics Center, Institute of Cytology & Genetics, 630090, Novosibirsk, Russia
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Shekhar V, Choudhary N, Rathore P, Singh SP, Bhatnagar S. Non-Invasive Objective Markers to Measure Pain: A Direction to Develop a Pain Device - A Narrative Review. Indian J Palliat Care 2023; 29:217-222. [PMID: 37325263 PMCID: PMC10261936 DOI: 10.25259/ijpc_257_2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 03/11/2023] [Indexed: 06/17/2023] Open
Abstract
Objective To review the literature regarding non-invasive objective measurements of pain. Measuring pain is of uttermost importance, but it can be an inconvenient task, especially in terms of the interpretation of patient's information. Reiterating, there is no "standard" that provides the physician with a method to objectively quantify this problem of patient's pain. For assessing the pain, physician relies solely on unidimensional assessment tools or questionnaire-based pain assessment. Although pain is a subjective experience of the patient, but there is a need to measure pain sometimes in the individuals who cannot communicate their quality and severity of pain. Material and Methods The articles from PubMed and Google Scholar without any year and age limit were searched in the current narrative review. A total of 16 markers were searched and their relation to pain was studied. Results Studies have shown that these markers change in relation to pain and it can be considered a valuable tool for pain measurement but there are multiple factors like psychological and emotional factors which affect these markers. Conclusion There is lack of evidence to show which marker can be used for measuring pain accurately. This narrative review is an attempt to look into the various pain-related markers that can be used and it calls for further studies including clinical trials with different diseases and taking into accounts different factors affecting pain to give an accurate measurement of pain.
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Affiliation(s)
- Varun Shekhar
- Department of Onco-Anaesthesia and Palliative Medicine, Dr. B.R.A. IRCH, All India Institute of Medical Sciences, New Delhi, India
| | - Nandan Choudhary
- Department of Onco-Anaesthesia and Palliative Medicine, Dr. B.R.A. IRCH, All India Institute of Medical Sciences, New Delhi, India
| | - Puneet Rathore
- Department of Onco-Anaesthesia and Palliative Medicine, Dr. B.R.A. IRCH, All India Institute of Medical Sciences, New Delhi, India
| | - Suraj Pal Singh
- Department of Onco-Anaesthesia and Palliative Medicine, Dr. B.R.A. IRCH, All India Institute of Medical Sciences, New Delhi, India
| | - Sushma Bhatnagar
- Department of Onco-Anaesthesia and Palliative Medicine, Dr. B.R.A. IRCH, All India Institute of Medical Sciences, New Delhi, India
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Nakamura N, Heng P, Hayashi N. Muscle stretching induces the mechanoreflex response in human arterial blood pressure. J Appl Physiol (1985) 2023; 134:1-9. [PMID: 36356256 DOI: 10.1152/japplphysiol.00418.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The muscle mechanoreflex has been considered to make a small contribution to the cardiovascular response to exercise in healthy humans because no pressor response has been observed during stimulation of mechanosensitive receptors, such as static passive stretching, during many human studies. There is room for rethinking this consideration since the pressor response to upper limb exercise is greater than that to lower limb exercise. We examined whether static passive stretching of the forearm muscles causes a muscle mechanoreflex-induced pressor response in humans. Eighteen healthy men were recruited for this study. After a 15-min rest period in the supine position with a neutral (0°) wrist joint angle, all participants completed static passive stretching of the forearm for 60 s at four different intensities: minimal painful passive stretching (PPS), moderate-intensity passive stretching (MPS), low-intensity passive stretching (LPS), and no load (NL). During the procedure, beat-to-beat arterial blood pressure was measured using finger photoplethysmography. The force generated between the passively stretched hand and the experimenter's hands was recorded using a force transducer. Mean arterial pressure (MAP) during PPS and MPS significantly increased from baseline during the last 40 s (P < 0.05). MAP was significantly greater at 50 s and 60 s, depending on the intensity. MPS induced a greater peak response in MAP than lower intensities (P < 0.05). None of the subjects reported pain during the MPS and LPS trials. Static passive stimulation of the forearm is an effective method of isolating the muscle mechanoareflex-induced pressor response in humans.NEW & NOTEWORTHY The muscle mechanoreflex was considered to have a small contribution to cardiovascular regulation during exercise in healthy humans. In contrast, the results of this study indicate that static stretching of the forearm induces a pressor response in healthy humans and suggest that the mechanoreflex explicitly induces the pressor response during exercise in humans. The methods applied are useful for evaluating the pressor response to the mechanoreflex regardless of health, aging, and disease.
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Affiliation(s)
| | - Peng Heng
- Graduate School of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - Naoyuki Hayashi
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
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Linking interpretation bias to individual differences in pain sensitivity. CURRENT PSYCHOLOGY 2022. [DOI: 10.1007/s12144-022-03793-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Thieme K, Jung K, Mathys MG, Gracely RH, Turk DC. Cardiac-Gated Neuromodulation Increased Baroreflex Sensitivity and Reduced Pain Sensitivity in Female Fibromyalgia Patients. J Clin Med 2022; 11:jcm11206220. [PMID: 36294542 PMCID: PMC9605536 DOI: 10.3390/jcm11206220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/03/2022] [Accepted: 10/17/2022] [Indexed: 01/24/2023] Open
Abstract
The study presents a novel approach of programing pain inhibition in chronic pain patients based on the hypothesis that pain perception is modulated by dysfunctional dorsal medial nucleus tractus solitarii (dmNTS) reflex arcs that produce diminished baroreflex sensitivity (BRS) resulting from a conditioned response. This study tested whether administration of noxious and non-noxious electrical stimuli synchronized with the cardiac cycle resets BRS, reestablishing pain inhibition. A total of 30 pain-free normotensives controls (NC) and 32 normotensives fibromyalgia (FM) patients received two, ≈8 min-epochs of cardiac-gated, peripheral electrical stimuli. Non-painful and painful electrical stimuli were synchronized to the cardiac cycle as the neuromodulation experimental protocol (EP) with two control conditions (CC1, CC2). BRS, heart-rate-variability (HRV), pain threshold and tolerance, and clinical pain intensity were assessed. Reduced BRS in FM at baseline increased by 41% during two, ≈8 min-epochs of stimulation. Thresholds in FM increased significantly during the experimental protocol (all Ps < 0.001) as did HRV. FM levels of clinical pain significantly decreased by 35.52% during the experimental protocol but not during control stimulations (p < 0.001). Baroreceptor training may reduce FM pain by BRS-mediated effects on intrinsic pain regulatory systems and autonomic responses.
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Affiliation(s)
- Kati Thieme
- Department of Medical Psychology, Philipps-University Marburg, 35037 Marburg, Germany
- Correspondence: ; Tel.: +49-15158532986
| | - Kathrin Jung
- Department of Medical Psychology, Philipps-University Marburg, 35037 Marburg, Germany
| | - Marc G. Mathys
- Department of Medical Psychology, Philipps-University Marburg, 35037 Marburg, Germany
| | - Richard H. Gracely
- Center for Pain Research and Innovation, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Dennis C. Turk
- Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA 98195, USA
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Li MT, Robinson CL, Ruan QZ, Surapaneni S, Southerland W. The Influence of Sleep Disturbance on Chronic Pain. Curr Pain Headache Rep 2022; 26:795-804. [PMID: 36190680 DOI: 10.1007/s11916-022-01074-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2022] [Indexed: 12/01/2022]
Abstract
PURPOSE OF REVIEW The purpose of this review is to present an overview of common sleep disturbance pathologies and their impact on chronic pain, while examining various factors that are implicit in the relationship between sleep disturbance and chronic pain, including neurobiochemistry, anatomy, and systemic mediators, and reviewing recent and landmark literature. RECENT FINDINGS Earlier literature reviews and studies have introduced the bidirectional relationship between sleep disturbance and chronic pain; that is, impaired sleep may worsen chronic pain, and chronic pain causes sleep disturbance. However, more recent reviews and studies seem to show a more associative, rather than causative relationship. There have been recent studies that attempt to determine mechanisms that link sleep disturbance and chronic pain; the results of these studies were more varied, ultimately concluding that there may be a separate, yet-to-be discovered mechanism that shows the causative relationship between sleep disturbance and pain. There are several neurotransmitters that are involved in the mediation of chronic pain and sleep disturbance as separate entities, and some studies have shown that there may be mechanisms that govern both chronic pain and sleep disturbance as a single unit. Other neuroendocrine substances also serve to mediate chronic pain and sleep disturbance. All these substances are found to be associated with various sleep disorders and are also associated with chronic pain symptoms as well. Inflammation plays a role in chronic pain and sleep disturbance, with an increase in inflammatory substances and mediators associated with an increase or worsening in chronic pain symptoms and sleep disorders. The HPA axis plays a role in chronic pain and sleep disorders, influencing pain and sleep pathways through stress response, inflammation, and maintenance of homeostasis. There are several variables that influence both chronic pain and sleep disturbance, and more research into these variables may further our understanding into the complex pathways governing the influence of sleep disturbance on pain, and ultimately to improve treatment for this issue.
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Affiliation(s)
- Michael T Li
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Christopher Louis Robinson
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Qing Zhao Ruan
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Sindhuja Surapaneni
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Warren Southerland
- Department of Anesthesia, The Hospital of the University of Pennsylvania, Philadelphia, PA, USA
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White L, Smith AD, Farrell SF. Associations between resting heart rate, resting blood pressure, psychological variables and pain processing in chronic whiplash-associated disorder: a cross-sectional study. PAIN MEDICINE 2022; 23:1882-1890. [PMID: 35587744 PMCID: PMC9629357 DOI: 10.1093/pm/pnac075] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/13/2022] [Accepted: 05/10/2022] [Indexed: 11/30/2022]
Abstract
Objective Autonomic nervous system dysfunction has been implicated in chronic whiplash-associated disorder (WAD). However, the relationship between autonomic variables (e.g., resting heart rate and blood pressure) and clinical factors in chronic WAD is not well understood. This study sought to examine the associations between resting heart rate, resting blood pressure, pain processing and psychological variables in chronic WAD and in pain-free controls. Design Secondary analysis of a cross-sectional study. Setting University clinical research laboratory. Subjects Thirty-six people with chronic WAD Grade II (mean [SD] age 40.1 [14.6] years, 28 females) and 25 pain-free controls (35.6 [13.0] years, 17 females). Methods Participants had resting heart rate, systolic and diastolic blood pressure measured. Pain processing measures comprised: (i) pain pressure threshold at the cervical spine, hand and leg, (ii) temporal summation at the cervical spine and hand, and (iii) conditioned pain modulation. Psychological outcomes included measures of kinesiophobia, pain catastrophizing and post-traumatic stress symptoms. Correlations between autonomic variables, pain processing and psychological variables were determined (P < .05, 5% FDR). Results No significant correlations between autonomic and pain processing variables, or autonomic and psychological variables were found in the chronic WAD group. In the control group, diastolic blood pressure was positively correlated with cervical spine pressure pain threshold (r = 0.53, P = .007). Conclusions An association between blood pressure and pain sensitivity was observed in the control group but not the chronic WAD group. Such an association appears to be disrupted in chronic WAD, which may infer involvement of autonomic pathways in the pathophysiology of this condition.
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Affiliation(s)
- Liam White
- School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia
| | - Ashley D Smith
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Scott F Farrell
- RECOVER Injury Research Centre, NHMRC Centre for Research Excellence: Better Health Outcomes for Compensable Injury, The University of Queensland, Brisbane, Australia.,Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia
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Makovac E, Venezia A, Hohenschurz-Schmidt D, Dipasquale O, Jackson JB, Medina S, O'Daly O, Williams SCR, McMahon SB, Howard MA. The association between pain-induced autonomic reactivity and descending pain control is mediated by the periaqueductal grey. J Physiol 2021; 599:5243-5260. [PMID: 34647321 DOI: 10.1113/jp282013] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 09/28/2021] [Indexed: 11/08/2022] Open
Abstract
There is a strict interaction between the autonomic nervous system (ANS) and pain, which might involve descending pain modulatory mechanisms. The periaqueductal grey (PAG) is involved both in descending pain modulation and ANS, but its role in mediating this relationship has not yet been explored. Here, we sought to determine brain regions mediating ANS and descending pain control associations. Thirty participants underwent conditioned pain modulation (CPM) assessments, in which they rated painful pressure stimuli applied to their thumbnail, either alone or with a painful cold contralateral stimulation. Differences in pain ratings between 'pressure-only' and 'pressure + cold' stimuli provided a measure of descending pain control. In 18 of the 30 participants, structural scans and two functional MRI assessments, one pain-free and one during cold-pain were acquired. Heart rate variability (HRV) was simultaneously recorded. Normalised low-frequency HRV (LF-HRVnu) and the CPM score were negatively correlated; individuals with higher LF-HRVnu during pain reported reductions in pain during CPM. PAG-ventro-medial prefrontal cortex (vmPFC) and PAG-rostral ventromedial medulla (RVM) functional connectivity correlated negatively with the CPM. Importantly, PAG-vmPFC functional connectivity mediated the strength of the LF-HRVnu-CPM association. CPM response magnitude was also negatively correlated with vmPFC GM volume. Our multi-modal approach, using behavioural, physiological and MRI measures, provides important new evidence of interactions between ANS and descending pain mechanisms. ANS dysregulation and dysfunctional descending pain modulation are characteristics of chronic pain. We suggest that further investigation of body-brain interactions in chronic pain patients may catalyse the development of new treatments. KEY POINTS: Heart rate variability (HRV) is associated with descending pain modulation as measured by the conditioned pain modulation protocol (CPM). There is an association between CPM scores and the functional connectivity between the periaqueductal grey (PAG) and ventro-medial prefrontal cortex (vmPFC). CPM scores are also associated with vmPFC grey matter volume. The strength of functional connectivity between the PAG and vmPFC mediates the association between HRV and CPM. Our data provide new evidence of interactions between the autonomic nervous system and descending pain mechanisms.
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Affiliation(s)
- Elena Makovac
- Department of Neuroimaging, King's College London, London, UK.,Wolfson Centre for Age Related Diseases, King's College London, London, UK
| | | | - David Hohenschurz-Schmidt
- Department of Neuroimaging, King's College London, London, UK.,Pain Research, Department Surgery & Cancer, Faculty of Medicine, Imperial College, London, UK
| | | | - Jade B Jackson
- Department of Neuroimaging, King's College London, London, UK.,MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge, UK
| | - Sonia Medina
- Department of Neuroimaging, King's College London, London, UK.,Wolfson Centre for Age Related Diseases, King's College London, London, UK
| | - Owen O'Daly
- Department of Neuroimaging, King's College London, London, UK
| | | | - Stephen B McMahon
- Wolfson Centre for Age Related Diseases, King's College London, London, UK
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Abstract
OBJECTIVE Spontaneous or experimentally induced high blood pressure (BP) is associated with reduced pain perception, known as BP-related hypoalgesia. Despite its clinical implications, such as the interference with early detection of myocardial infarction in 'at risk' groups, the size of the association between high BP and pain has not yet been quantified. Moreover, the distinct association between high BP and physiological or psychological components of pain has not yet been considered so far. The aim of this study was to overcome this gap by performing separate meta-analyses on nociceptive response versus quantifiable perceptual measures of pain in relation to high BP. METHODS PubMed and Web of Knowledge databases were searched for English language studies conducted in humans. Fifty-nine studies were eligible for the analyses. Pooled effect sizes (Hedges' g) were compared. Random effect models were used. Results show that higher BP is significantly associated with lower nociceptive response (g = 0.38; k = 6) and reduced pain perception, assessed by quantifiable measures (g = 0.48; k = 59). RESULTS The association between BP and pain perception, derived from highly heterogeneous studies, was characterized by significant publication bias. BP assessment, pain assessment, site of pain stimulation, percentage of female participants in the sample, and control for potential confounders were significant moderators. CONCLUSION Current meta-analytic results confirm the presence of BP-related hypoalgesia and point towards the need for a better understanding of its underlying mechanisms.
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Fillingim RB. In memoriam William Maixner: 1952 to 2020. Pain 2021; 162:989-992. [PMID: 37595617 DOI: 10.1097/j.pain.0000000000002200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Roger B Fillingim
- Department of Community Dentistry and Behavioral Science, Pain Research and Intervention Center of Excellence, University of Florida, Gainesville, FL, United States
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14
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Suarez-Roca H, Mamoun N, Sigurdson MI, Maixner W. Baroreceptor Modulation of the Cardiovascular System, Pain, Consciousness, and Cognition. Compr Physiol 2021; 11:1373-1423. [PMID: 33577130 DOI: 10.1002/cphy.c190038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Baroreceptors are mechanosensitive elements of the peripheral nervous system that maintain cardiovascular homeostasis by coordinating the responses to external and internal environmental stressors. While it is well known that carotid and cardiopulmonary baroreceptors modulate sympathetic vasomotor and parasympathetic cardiac neural autonomic drive, to avoid excessive fluctuations in vascular tone and maintain intravascular volume, there is increasing recognition that baroreceptors also modulate a wide range of non-cardiovascular physiological responses via projections from the nucleus of the solitary tract to regions of the central nervous system, including the spinal cord. These projections regulate pain perception, sleep, consciousness, and cognition. In this article, we summarize the physiology of baroreceptor pathways and responses to baroreceptor activation with an emphasis on the mechanisms influencing cardiovascular function, pain perception, consciousness, and cognition. Understanding baroreceptor-mediated effects on cardiac and extra-cardiac autonomic activities will further our understanding of the pathophysiology of multiple common clinical conditions, such as chronic pain, disorders of consciousness (e.g., abnormalities in sleep-wake), and cognitive impairment, which may result in the identification and implementation of novel treatment modalities. © 2021 American Physiological Society. Compr Physiol 11:1373-1423, 2021.
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Affiliation(s)
- Heberto Suarez-Roca
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University, Durham, North Carolina, USA
| | - Negmeldeen Mamoun
- Department of Anesthesiology, Division of Cardiothoracic Anesthesia and Critical Care Medicine, Duke University, Durham, North Carolina, USA
| | - Martin I Sigurdson
- Department of Anesthesiology and Critical Care Medicine, Landspitali, University Hospital, Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - William Maixner
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University, Durham, North Carolina, USA
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Al-Ghamdi S, Shubair MM, El-Metwally A, Alsalamah M, Alshahrani SM, Al-Khateeb BF, Bahkali S, Aloudah SM, Al-Zahrani J, Almigbal TH, Aldossari KK. The relationship between chronic pain, prehypertension, and hypertension. A population-based cross-sectional survey in Al-Kharj, Saudi Arabia. Postgrad Med 2020; 133:345-350. [PMID: 33317375 DOI: 10.1080/00325481.2020.1863716] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Background: Chronic pain and hypertension are highly prevalent in both developing and developed countries. Although they may appear to be two separate phenomena, several studies in developed countries have found them associated at the population level. Studies in developing countries are scarce and association between pain with prehypertension are rarely explored. The objective of this study was to explore the potential association between prehypertension, hypertension, and chronic pain in a Saudi population.Methods: A cross-sectional general population-based study was conducted on a random sample of employees and university students over a period of 6 months from January 2016 to June 2016 in Al Kharj, Saudi Arabia. A total of 1200 general population adults (aged 18 years and above) were invited to participate in the study.Results: With a response rate of 85.9%, 1031 individuals were included in the final analysis. Among the general population of Al-Kharj, statistically significant association was found between age and chronic pain [Odds ratio (OR) = 1.764 [95% C.I. = 1.391-1.927], P < 0.0001] and between hypertension and chronic pain [(OR) = 1.039 [95% C.I. = 1.018-1.060], P < 0.0001], respectively. The association between prehypertension and chronic pain was not statistically significant [(OR) = 1.211 [95% C.I. = 0.879-1.668, P = 0.243].Conclusion: Results of this survey suggests a statistically significant relationship between hypertension (but not prehypertension) and chronic pain. The temporality of the relationship between hypertension and chronic needs to be explored in future longitudinal studies.
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Affiliation(s)
- Sameer Al-Ghamdi
- Family and Community Medicine Department, College of Medicine, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Mamdouh M Shubair
- School of Health Sciences, University of Northern British Columbia (UNBC), Prince George, BC, Canada
| | - Ashraf El-Metwally
- Department of Epidemiology and Biostatistics, College of Public Health & Health Informatics; King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Majid Alsalamah
- Department of Emergency Medicine, College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Kingdom of Saudi Arabia
| | - Saeed Mastour Alshahrani
- College of Applied Medical Sciences, King Khalid University, Cancer Research Unit, King Khalid University, Abha, Saudi Arabia
| | - Badr F Al-Khateeb
- College of Public Health and Health Informatics (CPHHI), Riyadh, Saudi Arabia
| | - Salwa Bahkali
- Princess Nourah Bint Abdulrahman University, King Abdullah Bin AbdulAziz, University Hospital, Riyadh, Saudi Arabia
| | - Sara M Aloudah
- Department of Family and Community Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Jamaan Al-Zahrani
- Family and Community Medicine Department, College of Medicine, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Turky H Almigbal
- Family and Community Medicine Department, College of Medicine, King Saud University, Riyadh, Saudi Arabia
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Kim YS, Kang KH, Lee HJ. Factors Related to Pain in Patients With Retorn Rotator Cuffs: Early Postoperative Pain Predicts Pain at 12 Months Postoperatively. Orthop J Sports Med 2020; 8:2325967120947414. [PMID: 32964060 PMCID: PMC7488906 DOI: 10.1177/2325967120947414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 03/17/2020] [Indexed: 11/15/2022] Open
Abstract
Background: Retearing of a repaired rotator cuff leads to diverse symptoms, including pain, regardless of the degree of the tear, but the relationship between pain and retears is poorly understood. Purpose: To determine which factors are correlated with shoulder pain in retears of a repaired rotator cuff. Study Design: Case-control study; Level of evidence, 3. Methods: We retrospectively reviewed a cohort of patients who were diagnosed as having a retear on magnetic resonance imaging after primary rotator cuff repair. The primary outcome variable of interest was the visual analog scale (VAS) for pain score at 12-month and final follow-up (mean, 25.2 months). We evaluated the relationship of pain at 12-month and final follow-up with preoperative patient factors (age, sex, and underlying conditions), preoperative range of motion, and preoperative pain; postoperative pain at 3 and 6 months; and perioperative conditions (tear extent, tear size, accompanying lesions, and procedures other than rotator cuff repair). Results: A total of 48 patients were reviewed. The VAS score at 3 months postoperatively showed a positive correlation with the VAS score at 12 months postoperatively (ρ = 0.537; P < .001) and at final follow-up (ρ = 0.537; P < .001). Univariate and multivariate regression analyses revealed that the VAS score at 3 months postoperatively (P = .0001 and P = .0017, respectively), hypertension (P = .0108 and P = .0073, respectively), and late detection of the retear (P = .0091 and P = .0208, respectively) were significant predictors of pain at 12 months postoperatively. Conclusion: The presence of pain in the early postoperative period, underlying hypertension, and late detection of the retear were related to pain severity in patients 12 months after rotator cuff surgery.
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Affiliation(s)
- Yang-Soo Kim
- Department of Orthopedic Surgery, Seoul St Mary's Hospital, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ki-Ho Kang
- Department of Orthopedic Surgery, Seoul St Mary's Hospital, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyo-Jin Lee
- Department of Orthopedic Surgery, Seoul St Mary's Hospital, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Abstract
Baroreceptors are mechanosensitive elements of the peripheral nervous system that maintain homeostasis by coordinating physiologic responses to external and internal stimuli. While it is recognized that carotid and cardiopulmonary baroreceptor reflexes modulate autonomic output to mitigate excessive fluctuations in arterial blood pressure and to maintain intravascular volume, increasing evidence suggests that baroreflex pathways also project to key regions of the central nervous system that regulate somatosensory, somatomotor, and central nervous system arousal. In addition to maintaining autonomic homeostasis, baroreceptor activity modulates the perception of pain, as well as neuroimmune, neuroendocrine, and cognitive responses to physical and psychologic stressors. This review summarizes the role that baroreceptor pathways play in modulating acute and chronic pain perception. The contribution of baroreceptor function to postoperative outcomes is also presented. Finally, methods that enhance baroreceptor function, which hold promise in improving postoperative and pain management outcomes, are presented.
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18
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Thieme K, Meller T, Evermann U, Malinowski R, Mathys MG, Graceley RH, Maixner W, Turk DC. Efficacy of Systolic Extinction Training in Fibromyalgia Patients With Elevated Blood Pressure Response to Stress: A Tailored Randomized Controlled Trial. Arthritis Care Res (Hoboken) 2020; 71:678-688. [PMID: 29882635 DOI: 10.1002/acr.23615] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 06/05/2018] [Indexed: 01/19/2023]
Abstract
OBJECTIVE An intrinsic pain regulatory system is modulated by both cardiovascular dynamics that influence baroreflex sensitivity (BRS) and is diminished in fibromyalgia (FM). Baroreceptors relay cardiovascular output to the dorsal medial nucleus tractus solitarius reflex arcs that regulate pain, sleep, anxiety, and blood pressure. The aim of this study was to evaluate the effects of systolic extinction training (SET), which combines operant treatment (OT) with baroreflex training (BRT). BRT delivers peripheral electrical stimulation within a few milliseconds of the systolic or diastolic peak in the cardiac cycle. In addition, we compared SET to OT-transcutaneous electrical stimulation (TENS) independent of the cardiac cycle and aerobic exercise (AE)-BRT in FM patients with elevated blood pressure responses to stress. METHODS Sixty-two female patients with FM were randomized to receive either SET (n = 21), OT-TENS (n = 20), or AE-BRT (n = 21). Outcome assessments were performed before treatment (T1), after 5 weeks of treatment (T2), and after the 12-month follow-up (T3). RESULTS In contrast to patients receiving OT-TENS or AE-BRT, those receiving SET reported a significantly greater reduction in pain and pain interference (all P < 0.01) that was maintained at the 12-month follow-up. Clinically meaningful pain reduction at T3 was achieved in 82% of patients in the SET group, 39% of those in the OT-TENS group, and only 14% of those in the AE-BRT group. Patients in the SET group showed a significant increase (57%) in BRS following treatment, while neither the AE-BRT group or the OT-TENS group showed significant changes over time. CONCLUSION SET resulted in statistically significant, clinically meaningful, and long-lasting pain remission and interference compared to OT-TENS and AE-BRT. These results suggest that BRS modification is the primary mechanism of improvement. Replication of our results using larger samples and extension to other chronic pain conditions appear to be warranted.
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Affiliation(s)
- Kati Thieme
- Institute of Medical Psychology at Philipps-University Marburg, Marburg, Germany
| | - Tina Meller
- Institute of Medical Psychology at Philipps-University Marburg, Marburg, Germany
| | - Ulrika Evermann
- Institute of Medical Psychology at Philipps-University Marburg, Marburg, Germany
| | - Robert Malinowski
- Institute of Medical Psychology at Philipps-University Marburg, Marburg, Germany
| | - Marc G Mathys
- Institute of Medical Psychology at Philipps-University Marburg, Marburg, Germany
| | - Richard H Graceley
- Center for Pain Research and Innovation, University of North Carolina, Chapel Hill
| | - William Maixner
- Center for Translational Sciences, Duke University, Durham, North Carolina
| | - Dennis C Turk
- Center for Pain Research on Impact, Measurement, and Effectiveness, University of Washington, Seattle
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19
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de la Coba P, Bruehl S, Garber J, Smith CA, Walker LS. Is Resolution of Chronic Pain Associated With Changes in Blood Pressure-related Hypoalgesia? Ann Behav Med 2019; 52:552-559. [PMID: 29860365 DOI: 10.1093/abm/kax021] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Background In healthy individuals, elevated resting blood pressure (BP) is associated with reduced pain responsiveness and lower temporal summation. Prior work indicates that this BP-related hypoalgesia is reduced in individuals with chronic pain. Purpose This study evaluated whether resolution of chronic pain was associated with greater BP-related hypoalgesia compared to nonresolution. Methods From a prospective sample of adolescents and young adults diagnosed with chronic functional abdominal pain an average of 9 years earlier, 99 individuals in whom the condition had resolved and 51 individuals with ongoing abdominal pain were studied. Resting systolic BP was assessed, followed by evaluation of thermal pain threshold and tolerance, and assessment of temporal summation to thermal pain stimuli. Results Higher resting systolic BP was significantly associated with higher pain threshold and tolerance, and lower temporal summation only in the group with resolved functional abdominal pain (p < .05). Hierarchical regressions revealed that interactions between BP and resolution of chronic pain were significant only for pain tolerance (p < .05). Analyses by sex indicated that interactions between BP and resolution status were significant for the temporal summation outcome in males but not in females. Conclusions Results suggest that BP-related hypoalgesic mechanisms may be more effective in individuals in whom chronic pain has resolved compared to those with ongoing chronic pain. Findings hint at sex differences in the extent to which resolution of chronic pain is associated with BP-related hypoalgesia. Whether greater BP-related hypoalgesia is a consequence of, or alternatively a contributor to, resolution of chronic pain warrants further investigation.
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Affiliation(s)
| | - Stephen Bruehl
- Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Judy Garber
- Department of Psychology and Human Development, Vanderbilt University, Nashville, TN, USA
| | - Craig A Smith
- Department of Psychology and Human Development, Vanderbilt University, Nashville, TN, USA
| | - Lynn S Walker
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
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20
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Resting blood pressure modulates chest pain intensity in patients with acute myocardial infarction. Pain Rep 2019; 4:e714. [PMID: 31583341 PMCID: PMC6749909 DOI: 10.1097/pr9.0000000000000714] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 12/20/2018] [Accepted: 01/01/2019] [Indexed: 11/26/2022] Open
Abstract
Introduction and Objectives Animal models and human studies show that resting blood pressure (BP) is inversely associated with pain sensitivity. The phenomenon of "hypertension-associated hypoalgesia" was proposed as a possible explanation for the intervariability in pain perception. Given that a portion of patients with acute myocardial infarction (AMI) do not experience significant pain, we used the model of severe cardiac ischemia to explore whether BP affects the intensity of chest pain. Methods Patients with AMI admitted to the cardiac intensive care unit with coronary catheterization-proven completely occluded coronary artery were included (n = 67). Resting BP at admission and 5 days after AMI was obtained. Participants reported chest pain intensity and underwent psychophysical evaluation including pain ratings for pressure, heat, and pinprick stimuli as well as temporal summation and conditioned pain modulation paradigms. Results Patients with lower systolic BP (≤120 mm Hg) vs higher (≥140 mm Hg) reported higher chest pain scores at symptom onset (82.3 vs 61.7, P = 0.048) and during peak AMI (82.8 vs 57.5, P = 0.019). Higher pain ratings in response to pinprick stimulus were associated with lower BP at admission (analysis of variance P = 0.036). Patients with hypertension demonstrated lower pain sensitivity in response to pressure stimulation (531.7 ± 158.9 kPa/s vs 429.1 ± 197.4). No significant associations were observed between BP and the other assessed psychophysical measures. Conclusion Study findings reinforce the phenomenon of hypertension-associated hypoalgesia through characterization of the association between BP and clinical pain experiences at onset and during AMI in a model of acute clinical pain.
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21
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Abstract
OBJECTIVE High blood pressure (BP) is associated with reduced pain sensitivity, known as BP-related hypoalgesia. The underlying neural mechanisms remain uncertain, yet arterial baroreceptor signaling, occurring at cardiac systole, is implicated. We examined normotensives using functional neuroimaging and pain stimulation during distinct phases of the cardiac cycle to test the hypothesized neural mediation of baroreceptor-induced attenuation of pain. METHODS Eighteen participants (10 women; 32.7 (6.5) years) underwent BP monitoring for 1 week at home, and individual pain thresholds were determined in the laboratory. Subsequently, participants were administered unpredictable painful and nonpainful electrocutaneous shocks (stimulus type), timed to occur either at systole or at diastole (cardiac phase) in an event-related design. After each trial, participants evaluated their subjective experience. RESULTS Subjective pain was lower for painful stimuli administered at systole compared with diastole, F(1, 2283) = 4.82, p = 0.03. Individuals with higher baseline BP demonstrated overall lower pain perception, F(1, 2164) = 10.47, p < .0001. Within the brain, painful stimulation activated somatosensory areas, prefrontal cortex, cingulate cortex, posterior insula, amygdala, and the thalamus. Stimuli delivered during systole (concurrent with baroreceptor discharge) activated areas associated with heightened parasympathetic drive. No stimulus type by cardiac phase interaction emerged except for a small cluster located in the right parietal cortex. CONCLUSIONS We confirm the negative associations between BP and pain, highlighting the antinociceptive impact of baroreceptor discharge. Neural substrates associated with baroreceptor/BP-related hypoalgesia include superior parietal lobule, precentral, and lingual gyrus, regions typically involved in the cognitive aspects of pain experience.
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22
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Racial/ethnic differences in experimental pain sensitivity and associated factors - Cardiovascular responsiveness and psychological status. PLoS One 2019; 14:e0215534. [PMID: 30998733 PMCID: PMC6472780 DOI: 10.1371/journal.pone.0215534] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 04/03/2019] [Indexed: 01/08/2023] Open
Abstract
This study evaluated the contributions of psychological status and cardiovascular responsiveness to racial/ethnic differences in experimental pain sensitivity. The baseline measures of 3,159 healthy individuals-non-Hispanic white (NHW): 1,637, African-American (AA): 1,012, Asian: 299, and Hispanic: 211-from the OPPERA prospective cohort study were used. Cardiovascular responsiveness measures and psychological status were included in structural equation modeling based mediation analyses. Pain catastrophizing was a significant mediator for the associations between race/ethnicity and heat pain tolerance, heat pain ratings, heat pain aftersensations, mechanical cutaneous pain ratings and aftersensations, and mechanical cutaneous pain temporal summation for both Asians and AAs compared to NHWs. HR/MAP index showed a significant inconsistent (mitigating) mediating effect on the association between race/ethnicity (AAs vs. NHWs) and heat pain tolerance. Similarly, coping inconsistently mediated the association between race/ethnicity and mechanical cutaneous pain temporal summation in both AAs and Asians, compared to NHWs. The factor encompassing depression, anxiety, and stress was a significant mediator for the associations between race/ethnicity (Asians vs. NHWs) and heat pain aftersensations. Thus, while pain catastrophizing mediated racial/ethnic differences in many of the QST measures, the psychological and cardiovascular mediators were distinctly restrictive, signifying multiple independent mechanisms in racial/ethnic differences in pain.
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23
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Bruehl S, Olsen RB, Tronstad C, Sevre K, Burns JW, Schirmer H, Nielsen CS, Stubhaug A, Rosseland LA. Chronic pain-related changes in cardiovascular regulation and impact on comorbid hypertension in a general population: the Tromsø study. Pain 2019; 159:119-127. [PMID: 28953193 DOI: 10.1097/j.pain.0000000000001070] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Heart rate variability (HRV) and baroreflex sensitivity (BRS) are indexes reflecting the ability to maintain cardiovascular homeostasis amidst changing conditions. Evidence primarily from small studies suggests that both HRV and BRS may be reduced in individuals with chronic pain (CP), with potential implications for cardiovascular risk. We compared HRV and BRS between individuals with CP (broadly defined) and pain-free controls in a large unselected population sample. Participants were 1143 individuals reporting clinically meaningful CP and 5640 pain-free controls who completed a 106-second cold pressor test (CPT). Participants self-reported hypertension status. Resting HRV and BRS were derived from continuous beat-to-beat blood pressure recordings obtained before and after the CPT. Hierarchical regressions for the pre-CPT period indicated that beyond effects of age, sex, and body mass index, the CP group displayed significantly lower HRV in both the time domain (SDNN and rMSSD) and frequency domain (high-frequency HRV power), as well as lower BRS. Results were somewhat weaker for the post-CPT period. Mediation analyses indicated that for 6 of 7 HRV and BRS measures tested, there were significant indirect (mediated) effects of CP status on the presence of comorbid hypertension via reduced HRV or BRS. Results confirm in the largest and broadest sample tested to date that the presence of CP is linked to impaired cardiovascular regulation and for the first time provide support for the hypothesis that links between CP and comorbid hypertension reported in previous population studies may be due in part to CP-related decrements in cardiovascular regulation.
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Affiliation(s)
- Stephen Bruehl
- Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | | | - Knut Sevre
- Cardiology, Oslo University Hospital, Oslo, Norway
| | - John W Burns
- Department of Behavioral Science, Rush University, Chicago, IL, USA
| | - Henrik Schirmer
- Division of Medicine and Laboratory Sciences, Akershus University Hospital, Lørenskog, Norway.,Department of Clinical Medicine, University of Tromsø, The Arctic University, Tromsø, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Christopher Sivert Nielsen
- Department of Aging, Norwegian Institute of Public Health, Oslo, Norway.,Departments of Pain Management and Research and
| | - Audun Stubhaug
- Departments of Pain Management and Research and.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Leiv Arne Rosseland
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.,Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
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Blood pressure-related pain modulation in fibromyalgia: Differentiating between static versus dynamic pain indicators. Int J Psychophysiol 2018; 134:79-85. [PMID: 30321563 DOI: 10.1016/j.ijpsycho.2018.10.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 06/28/2018] [Accepted: 10/10/2018] [Indexed: 01/17/2023]
Abstract
INTRODUCTION Resting blood pressure (BP) has been found to be inversely associated with evoked pain responsiveness in healthy populations. However, some reports suggest that BP-related pain modulation may be dysfunctional in chronic pain patients. This study examined whether BP-related pain modulation, indexed by both static and dynamic evoked pain responses, is altered in fibromyalgia (FM) patients compared to pain-free individuals. METHOD Pain threshold and tolerance as static evoked pain measures and slowly repeated evoked pain (SREP) as a dynamic evoked pain index were measured in 30 FM patients and 27 healthy controls. BP was continuously recorded throughout a 5 minute pre-pain rest period. RESULTS SREP sensitization was observed only in the FM group. Higher BP predicted elevated pain threshold and tolerance in healthy individuals, but not in FM. Conversely, BP was inversely associated with SREP sensitization in FM whereas no association was found in healthy controls. CONCLUSIONS Static evoked pain measures suggested BP-related pain inhibitory dysfunction in FM. In contrast, for pain sensitization as indexed by SREP, FM displayed the expected BP-related inhibitory effects. BP-related pain modulation is manifested in FM differentially for static versus dynamic pain indicators. Use of both types of evoked pain measures may be valuable in the study of mechanisms underlying altered pain modulatory systems in FM.
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25
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Dabiri D, Harper DE, Kapila Y, Kruger GH, Clauw DJ, Harte S. Applications of sensory and physiological measurement in oral-facial dental pain. SPECIAL CARE IN DENTISTRY 2018; 38:395-404. [PMID: 30194771 PMCID: PMC6282998 DOI: 10.1111/scd.12323] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/01/2018] [Accepted: 08/05/2018] [Indexed: 12/01/2022]
Abstract
Dentists regularly employ a variety of self‐report and sensory techniques to aid in the diagnosis and treatment of tooth‐related disease. Many of these techniques leverage principles borrowed from psychophysics, the quantitative measurement of the relationship between stimuli and evoked sensations, which falls under the larger umbrella of quantitative sensory testing (QST). However, most clinicians fail to meet the bar for what could be considered quantitative sensory testing, and instead focus on qualitative and dichotomous “yes/no” aspects of sensory experience. With our current subjective measurements for pain assessments, diagnosis and treatment of dental pain in young children and individuals (any age) with severe cognitive impairment rely extensively on third‐party observations. Consequently, the limitation of inadequate pain diagnosis can lead to poor pain management. In this review, it discusses mechanisms that underlie acute and chronic dental pain. It details the measurement of somatosensory responses and pulpal blood flow as objective measures of tooth health and pain. It proposes that bridging these varied methodologies will significantly improve diagnosis and treatment of orofacial pain and pathology. It concludes that improving the precision of sensory measurements could yield important improvements in diagnostic challenges in pulpal pathology for noncommunicative and cognitively impaired individuals.
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Affiliation(s)
- Darya Dabiri
- Chronic Pain & Fatigue Research Center, Department of Anesthesiology, University of Michigan Medicine, Ann Arbor, Michigan
| | - Daniel E Harper
- Chronic Pain & Fatigue Research Center, Department of Anesthesiology, University of Michigan Medicine, Ann Arbor, Michigan
| | - Yvonne Kapila
- Division of Periodontology, Department of Orofacial Sciences, University of California San Francisco, San Francisco, California
| | - Grant H Kruger
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan
| | - Daniel J Clauw
- Chronic Pain & Fatigue Research Center, Department of Anesthesiology, University of Michigan Medicine, Ann Arbor, Michigan
| | - Steven Harte
- Chronic Pain & Fatigue Research Center, Department of Anesthesiology, University of Michigan Medicine, Ann Arbor, Michigan
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Yung EY, Oh C, Wong MS, Grimes JK, Barton EM, Ali MI, Cameron D. The immediate cardiovascular response to joint mobilization of the neck - A randomized, placebo-controlled trial in pain-free adults. Musculoskelet Sci Pract 2017; 28:71-78. [PMID: 28219804 DOI: 10.1016/j.msksp.2017.01.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 01/13/2017] [Accepted: 01/30/2017] [Indexed: 10/20/2022]
Abstract
BACKGROUND Some normotensive patients can have a spike in resting systolic blood pressure (SBP) in response to acute neck pain. Applying the typical dosage of mobilization may potentially result in a sympatho-excitatory response, further increasing resting SBP. Therefore, there is a need to explore other dosage regimens that could result in a decrease in SBP. OBJECTIVES To compare the blood pressure (BP) and heart rate (HR) response of pain-free, normotensive adults when receiving unilateral posterior-to-anterior mobilization (PA) applied to the neck versus its corresponding placebo (PA-P). STUDY DESIGN Double-Blind, Randomized Clinical Trial. METHODS 44 (18 females) healthy, pain-free participants (mean age, 23.8 ± 3.04 years) were randomly allocated to 1 of 2 groups. Group 1 received a PA-P in which light touch was applied to the right 6th cervical vertebra. Group 2 received a PA to the same location. BP and HR were measured prior to, during, and after the application of PA or PA-P. A mixed-effect model of repeated measure analysis was used for statistical analysis. RESULTS During-intervention, the PA group had a significant reduction in SBP, while the placebo group had an increase in SBP. The change in SBP during-intervention was significantly different between the PA and the placebo group (p-value = 0.003). There were no significant between-group differences found for HR and diastolic BP (DBP). The overall group-by-time interaction was statistically significant for SBP (p-value = 0.01). CONCLUSIONS When compared to placebo, the dosage of applied PA resulted in a small, short-lived drop in SBP not exceeding the minimal detectable change. Trial registered at Germanctr.de (DRKS00005095).
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Affiliation(s)
- Emmanuel Y Yung
- Doctor of Physical Therapy Program, Sacred Heart University, Fairfield, CT, United States; Doctor of Physical Therapy Program, Azusa Pacific University, Azusa, CA, United States; PhD Program in Ergonomics and Biomechanics, OIOC Research & Education, New York University Langone Medical Center, New York, NY, United States; Elevating Practice in Orthopaedic Physical Therapy, MGH Institute of Health Professions, Boston, MA, United States.
| | - Cheongeun Oh
- Division of Biostatistics, Department of Population Health, New York University School of Medicine, New York, NY, United States.
| | - Michael S Wong
- Doctor of Physical Therapy Program, Azusa Pacific University, Azusa, CA, United States; Physical Therapy Spine Fellowship, University of Southern California, Los Angeles, CA, United States; Physical Therapy Spine Fellowship, Kaiser Permanente, Los Angeles, CA, United States.
| | - Jason K Grimes
- Doctor of Physical Therapy Program, Sacred Heart University, Fairfield, CT, United States.
| | - Erica M Barton
- Orthopaedic Physical Therapy Residency Program, Kaiser Permanente Panorama City Medical Center, Panorama City, CA, United States.
| | - Muhammad I Ali
- Doctor of Physical Therapy Program, Sacred Heart University, Fairfield, CT, United States; United States Army Reserve, West Hartford, CT, United States.
| | - David Cameron
- Doctor of Physical Therapy Program, Sacred Heart University, Fairfield, CT, United States.
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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] [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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Effect of Preoperative Inflammatory Status and Comorbidities on Pain Resolution and Persistent Postsurgical Pain after Inguinal Hernia Repair. Mediators Inflamm 2016; 2016:5830347. [PMID: 27051077 PMCID: PMC4804103 DOI: 10.1155/2016/5830347] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 12/04/2015] [Accepted: 12/08/2015] [Indexed: 12/22/2022] Open
Abstract
Poor acute pain control and inflammation are important risk factors for Persistent Postsurgical Pain (PPSP). The aim of the study is to investigate, in the context of a prospective cohort of patients undergoing hernia repair, potential risk factors for PPSP. Data about BMI, anxious-depressive disorders, neutrophil-tolymphocyte ratio (NLR), proinflammatory medical comorbidities were collected. An analysis for correlation between comorbidities and PPSP was performed in those patients experiencing chronic pain at 3 months after surgery. Tramadol resulted less effective in pain at movement in patients with a proinflammatory status. Preoperative hypertension and NLR > 4 were correlated with PPSP intensity. Regional anesthesia was significantly protective on PPSP when associated with ketorolac. Patients with pain at 1 month were significantly more prone to develop PPSP at 3 months. NSAIDs or weak opioids are equally effective on acute pain and on PPSP development after IHR, but Ketorolac has better profile in patients with inflammatory background or undergoing regional anesthesia. Drug choice should be based on their potential side effects, patient's profile (comorbidities, preoperative inflammation, and hypertension), and type of anesthesia. Close monitoring is necessary to early detect pain conditions more prone to progress to a chronic syndrome.
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Joint Mobilization Enhances Mechanisms of Conditioned Pain Modulation in Individuals With Osteoarthritis of the Knee. J Orthop Sports Phys Ther 2016; 46:168-76. [PMID: 26721229 DOI: 10.2519/jospt.2016.6259] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
STUDY DESIGN An experimental laboratory study with a repeated-measures crossover design. BACKGROUND Treatment effects of joint mobilization may occur in part by decreasing excitability of central nociceptive pathways. Impaired conditioned pain modulation (CPM) has been found experimentally in persons with knee and hip osteoarthritis, indicating impaired inhibition of central nociceptive pathways. We hypothesized increased effectiveness of CPM following application of joint mobilization, determined via measures of deep tissue hyperalgesia. OBJECTIVE To examine the effect of joint mobilization on impaired CPM. METHODS An examination of 40 individuals with moderate/severe knee osteoarthritis identified 29 (73%) with impaired CPM. The subjects were randomized to receive 6 minutes of knee joint mobilization (intervention) or manual cutaneous input only, 1 week apart. Deep tissue hyperalgesia was examined via pressure pain thresholds bilaterally at the knee medial joint line and the hand at baseline, postintervention, and post-CPM testing. Further, vibration perception threshold was measured at the medial knee epicondyle at baseline and post-CPM testing. RESULTS Joint mobilization, but not cutaneous input intervention, resulted in a global increase in pressure pain threshold, indicated by diminished hyperalgesic responses to pressure stimulus. Further, CPM was significantly enhanced following joint mobilization. Diminished baseline vibration perception threshold acuity was enhanced following joint mobilization at the knee that received intervention, but not at the contralateral knee. Resting pain was also significantly lower following the joint intervention. CONCLUSION Conditioned pain modulation was enhanced following joint mobilization, demonstrated by a global decrease in deep tissue pressure sensitivity. Joint mobilization may act via enhancement of descending pain mechanisms in patients with painful knee osteoarthritis.
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Bae YH, Shin JS, Lee J, Kim MR, Park KB, Cho JH, Ha IH. Association between Hypertension and the Prevalence of Low Back Pain and Osteoarthritis in Koreans: A Cross-Sectional Study. PLoS One 2015; 10:e0138790. [PMID: 26393797 PMCID: PMC4578861 DOI: 10.1371/journal.pone.0138790] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/03/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Hypertension and musculoskeletal disorders are highly prevalent in adult populations. The objective of this study was to investigate the association between hypertension and prevalence of low back pain (LBP) and osteoarthritis in Koreans. METHODS A total 17,128 participants (age ≥20 years) who answered low back pain and osteoarthritis items in the 4th Korean National Health and Nutrition Examination Survey (2007-2009) were analyzed. Odds ratios were calculated using logistic regression and were adjusted for age, sex, income level, education, occupation, BMI, smoking status, alcohol consumption, and physical activity. RESULTS Lifetime prevalence of LBP in hypertensive subjects was 34.4%, and that of osteoarthritis 26.2%. LBP prevalence was significantly lower in hypertensives (fully adjusted OR 0.79; 95% CI 0.70-0.90), and both LBP and osteoarthritis prevalence was significantly lower in participants with systolic blood pressure ≥140mmHg than those with <120mmHg (fully adjusted OR 0.81; 95% CI 0.70-0.94, and 0.81; 95% CI 0.68-0.96, respectively). Prevalence of LBP in subjects with diastolic blood pressure ≥90mmHg was also significantly lower than those with <80mmHg (fully adjusted OR 0.73; 95% CI 0.63-0.85). LBP and osteoarthritis prevalence did not differ by systolic or diastolic blood pressure interval in respondents taking antihypertensive medication. LBP and osteoarthritis prevalence increased with longer hypertension duration (fully adjusted p for trend 0.028, and 0.0008, respectively). CONCLUSIONS Hypertension showed an inverse relationship with LBP and osteoarthritis prevalence, which may be ascribed to hypertension-associated hypalgesia, and antihypertensive medication intake and longer hypertension duration attenuated this association.
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Affiliation(s)
- Young-Hyeon Bae
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundation, Seoul, Republic of Korea
| | - Joon-Shik Shin
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundation, Seoul, Republic of Korea
| | - Jinho Lee
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundation, Seoul, Republic of Korea
| | - Me-riong Kim
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundation, Seoul, Republic of Korea
| | - Ki Byung Park
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundation, Seoul, Republic of Korea
| | - Jae-Heung Cho
- Department of Korean Rehabilitation Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - In-Hyuk Ha
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundation, Seoul, Republic of Korea
- * E-mail:
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Applebaum E, Nackley AG, Bair E, Maixner W, Khan AA. Genetic Variants in Cyclooxygenase-2 Contribute to Post-treatment Pain among Endodontic Patients. J Endod 2015; 41:1214-8. [PMID: 26081267 DOI: 10.1016/j.joen.2015.04.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 04/21/2015] [Accepted: 04/28/2015] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Nonsteroidal anti-inflammatory drugs (NSAIDs) have a well-established analgesic efficacy for inflammatory pain. These drugs exert their effect by inhibiting the enzyme cyclooxygenase (COX) and are commonly used for the management of pain after endodontic treatment. There are 2 distinct isoforms of COX: COX-1, which is constitutively expressed, and COX-2, which is primarily induced by inflammation. Previous studies have shown that functional human genetic variants of the COX-2 gene may explain individual variations in acute pain. The present study extends this work by examining the potential contribution of the 2 COX isoforms to pain after endodontic treatment. METHODS Ninety-four patients treated by endodontic residents at the University of North Carolina School of Dentistry were enrolled into a prospective cohort study. Data on potential predictors of post-treatment pain were collected, and all patients submitted saliva samples for genetic analysis. Nonsurgical root canal therapy was performed, and participants recorded pain levels for 5 days after. RESULTS In this study, 63% of patients experienced at least mild pain after root canal therapy, and 24% experienced moderate to severe pain. The presence of pretreatment pain was correlated with higher post-treatment pain (P = .01). Elevated heart rate (P = .02) and higher diastolic blood pressure (P = .024) were also correlated with decreased post-treatment pain. Finally, we identified genetic variants in COX-2 (haplotype composed of rs2383515 G, rs5277 G, rs5275 T, and rs2206593 A) associated with post-treatment pain after endodontic treatment (P = .025). CONCLUSIONS Understanding the genetic basis of pain after endodontic treatment will advance its prevention and management.
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Affiliation(s)
- Elizabeth Applebaum
- Private Practice, School of Dentistry, University of North Carolina, Chapel Hill, North Carolina
| | - Andrea G Nackley
- Center for Pain Research and Innovation, School of Dentistry, University of North Carolina, Chapel Hill, North Carolina
| | - Eric Bair
- Center for Pain Research and Innovation, School of Dentistry, University of North Carolina, Chapel Hill, North Carolina
| | - William Maixner
- Center for Pain Research and Innovation, School of Dentistry, University of North Carolina, Chapel Hill, North Carolina
| | - Asma A Khan
- Center for Pain Research and Innovation, School of Dentistry, University of North Carolina, Chapel Hill, North Carolina.
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Shahidi B, Sannes T, Laudenslager M, Maluf KS. Cardiovascular responses to an acute psychological stressor are associated with the cortisol awakening response in individuals with chronic neck pain. Physiol Behav 2015; 150:93-8. [PMID: 25662023 DOI: 10.1016/j.physbeh.2015.02.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 02/02/2015] [Accepted: 02/03/2015] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Dysregulation of the hypothalamic-pituitary-adrenal axis (HPA-axis) is common in individuals who experience chronic psychological stress, as well as individuals with chronic pain. Changes in cortisol availability in the presence of a chronic stressor such as pain may influence the sympathetic-adrenal-medullary (SAM) system, which contributes to cardiovascular responses to stress and also exhibits altered responsiveness in the presence of pain. The purpose of this study was to investigate the relationship between HPA activity during the cortisol awakening response and cardiovascular reactivity during exposure to an acute psychological stressor in individuals with chronic neck pain. METHODS Area under the curve (AUC) of the salivary cortisol awakening response was assessed in 41 individuals with chronic neck pain aged 19-80 years (22 men, 23 women). Slopes representing the change in mean arterial pressure and heart rate during a baseline quiet sitting condition, a low stress condition with mental concentration, and a high stress condition combining mental concentration with social evaluative threat were calculated for each individual as an index of cardiovascular responsiveness to the acute stressor. Cardiovascular responses were regressed on cortisol awakening AUC and pain duration, adjusting for age and sex. RESULTS Greater mean arterial pressure (β = -0.33, p = 0.02) and heart rate responses (β = -0.41, p = 0.007) to the acute psychological stressor were associated with lower cortisol awakening responses after adjusting for age and sex. Individuals with a shorter duration of chronic pain also demonstrated a larger increase in mean arterial pressure during the laboratory stressor (β = -0.39, p = 0.01), but there was no relationship between pain duration and changes in heart rate (p = 0.25). CONCLUSIONS Individuals with a shorter duration of chronic neck pain who demonstrate heightened cardiovascular responsiveness to an acute psychological stressor also exhibit lower cortisol awakening response. These results are consistent with time-dependent adaptations across the two major stress systems in the presence of chronic pain.
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Affiliation(s)
- Bahar Shahidi
- University of Colorado Denver, Rehabilitation Science Program, Department of Physical Medicine and Rehabilitation, Aurora, CO, USA
| | - Timothy Sannes
- University of Colorado Denver, Department of Psychiatry, Aurora, CO, USA
| | - Mark Laudenslager
- University of Colorado Denver, Department of Psychiatry, Aurora, CO, USA
| | - Katrina S Maluf
- University of Colorado Denver, Rehabilitation Science Program, Department of Physical Medicine and Rehabilitation, Aurora, CO, USA; San Diego State University, Physical Therapy Program, School of Exercise and Nutritional Sciences, San Diego, CA, USA.
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Thieme K, Turk DC, Gracely RH, Maixner W, Flor H. The Relationship Among Psychological and Psychophysiological Characteristics of Fibromyalgia Patients. THE JOURNAL OF PAIN 2015; 16:186-96. [DOI: 10.1016/j.jpain.2014.11.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 11/10/2014] [Accepted: 11/14/2014] [Indexed: 10/24/2022]
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The relationship between resting arterial blood pressure and oral postsurgical pain. Clin Oral Investig 2014; 19:1299-305. [DOI: 10.1007/s00784-014-1356-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 11/04/2014] [Indexed: 10/24/2022]
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Olsen RB, Bruehl S, Nielsen CS, Rosseland LA, Eggen AE, Stubhaug A. Chronic pain and cardiovascular stress responses in a general population: the Tromsø Study. J Behav Med 2014; 37:1193-201. [PMID: 24793322 DOI: 10.1007/s10865-014-9568-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Accepted: 04/21/2014] [Indexed: 12/22/2022]
Abstract
We tested whether cardiovascular stress responsiveness is elevated in individuals experiencing chronic pain in a large general population sample. Blood pressure (BP) and heart rate (HR) were assessed at rest, during the cold pressor test, and during subsequent recovery in 554 individuals reporting daily chronic pain and 3,082 individuals free of chronic pain. After correcting for potential confounds, differences as a function of chronic pain status were noted for only 5 of 23 cardiovascular outcomes despite very high statistical power. Compared to the pain-free group, the chronic pain group displayed higher baseline HR/mean arterial pressure (MAP) ratio (p = .03), greater systolic BP (SBP) reactivity during the cold pressor test (p = .04), and higher HR/MAP ratio (p = .047) and significantly less SBP (p = .017) and MAP (p = .041) return to baseline during recovery. Findings suggest that changes in cardiovascular stress responsiveness associated with chronic pain are of limited clinical significance and unlikely to contribute to increased cardiovascular risk in the chronic pain population.
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Affiliation(s)
- Roy Bjørkholt Olsen
- Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Rikshospitalet, Nydalen, PO Box 4950, 0424, Oslo, Norway,
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Gender differences in blood pressure-related hypoalgesia in a general population: the Tromsø Study. THE JOURNAL OF PAIN 2014; 14:699-708. [PMID: 23809360 DOI: 10.1016/j.jpain.2013.01.780] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 01/30/2013] [Accepted: 01/30/2013] [Indexed: 02/06/2023]
Abstract
UNLABELLED An inverse association between resting blood pressure (BP) and acute pain sensitivity is well documented. Whether BP-related hypoalgesia differs by gender is unclear from prior work. Whether it increases proportionally with BP throughout the full BP range is also unknown. We examined BP-related hypoalgesia in a general population sample (n = 10,371, aged 30-87) of equal gender distribution reflecting the extremely low through hypertensive BP range. Resting BP was assessed and individuals participated in a standardized cold pressor test, providing pain ratings every 9 seconds. For systolic BP (SBP), a significant SBP × Gender interaction was observed on mean pain ratings (P < .001). Females displayed significant BP-related hypoalgesia (P < .001), with males showing a 38% smaller effect (P < .001). A similar DBP × Gender interaction was also observed (P < .05). Spline regression indicated a significant (P < .001) change in slope of the SBP-pain association at 140 mmHg. Among individuals with lower resting SBP (<140/90), increasing hypoalgesia with increasing SBP levels was observed (P < .001), with no further increases in those with higher BP (≥140/90; P > .10). This is the first large-scale study to confirm past results suggesting that BP-related hypoalgesia differs by gender; that is, females exhibited greater hypoalgesia. BP-related hypoalgesia appears subject to ceiling effects in the hypertensive BP range. PERSPECTIVE Females show greater BP-related hypoalgesia than males, highlighting gender differences in endogenous antinociceptive systems. Extent of BP-related hypoalgesia does not increase further once resting pressures reach the hypertensive range, suggesting persistent maximal demands on these antinociceptive systems among hypertensive individuals.
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Wilson H, Carvalho B, Granot M, Landau R. Temporal stability of conditioned pain modulation in healthy women over four menstrual cycles at the follicular and luteal phases. Pain 2013; 154:2633-2638. [DOI: 10.1016/j.pain.2013.06.038] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 06/21/2013] [Accepted: 06/24/2013] [Indexed: 10/26/2022]
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Kume T, Hirose M, Yamashita T, Mizuno S, Hosokawa T, Sekimoto M, Kimura M. Analysis of blood pressure in elderly patients with postherpetic neuralgia. ACTA ACUST UNITED AC 2013. [DOI: 10.1163/156856901753421016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Saccò M, Meschi M, Regolisti G, Detrenis S, Bianchi L, Bertorelli M, Pioli S, Magnano A, Spagnoli F, Giuri PG, Fiaccadori E, Caiazza A. The relationship between blood pressure and pain. J Clin Hypertens (Greenwich) 2013; 15:600-5. [PMID: 23889724 DOI: 10.1111/jch.12145] [Citation(s) in RCA: 161] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/17/2013] [Accepted: 04/24/2013] [Indexed: 02/05/2023]
Abstract
The relationship between pain and hypertension is potentially of great pathophysiological and clinical interest, but is poorly understood. The perception of acute pain initially plays an adaptive role, which results in the prevention of tissue damage. The consequence of ascending nociception is the recruitment of segmental spinal reflexes through the physiological neuronal connections. In proportion to the magnitude and duration of the stimulus, these spinal reflexes cause the activation of the sympathetic nervous system, which increases peripheral resistances, heart rate, and stroke volume. The response also involves the neuroendocrine system, and, in particular, the hypothalamic-pituitary-adrenal axis, in addition to further activation of the sympathetic system by adrenal glands. However, in proportion to an elevation in resting blood pressure, there is a contemporary and progressive reduction in sensitivity to acute pain, which could result in a tendency to restore arousal levels in the presence of painful stimuli. The pathophysiological pattern is significantly different in the setting of chronic pain, in which the adaptive relationship between blood pressure and pain sensitivity is substantially reversed. The connection between acute or chronic pain and cardiovascular changes is supported observationally, but some of this indirect evidence is confirmed by experimental models and human studies. The pain regulatory process and functional interaction between cardiovascular and pain regulatory systems are briefly reviewed. Various data obtained are described, together with their potential clinical implications.
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Affiliation(s)
- Marcella Saccò
- Palliative Care Unit, Local Health Authority, via dei Benefattori 12, Parma, Italy
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Sanders AE, Essick GK, Fillingim R, Knott C, Ohrbach R, Greenspan JD, Diatchenko L, Maixner W, Dubner R, Bair E, Miller VE, Slade GD. Sleep apnea symptoms and risk of temporomandibular disorder: OPPERA cohort. J Dent Res 2013; 92:70S-7S. [PMID: 23690360 DOI: 10.1177/0022034513488140] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The authors tested the hypothesis that obstructive sleep apnea (OSA) signs/symptoms are associated with the occurrence of temporomandibular disorder (TMD), using the OPPERA prospective cohort study of adults aged 18 to 44 years at enrollment (n = 2,604) and the OPPERA case-control study of chronic TMD (n = 1,716). In both the OPPERA cohort and case-control studies, TMD was examiner determined according to established research diagnostic criteria. People were considered to have high likelihood of OSA if they reported a history of sleep apnea or ≥ 2 hallmarks of OSA: loud snoring, daytime sleepiness, witnessed apnea, and hypertension. Cox proportional hazards regression estimated hazard ratios (HRs) and 95% confidence limits (CL) for first-onset TMD. Logistic regression estimated odds ratios (OR) and 95% CL for chronic TMD. In the cohort, 248 individuals developed first-onset TMD during the median 2.8-year follow-up. High likelihood of OSA was associated with greater incidence of first-onset TMD (adjusted HR = 1.73; 95% CL, 1.14, 2.62). In the case-control study, high likelihood of OSA was associated with higher odds of chronic TMD (adjusted OR = 3.63; 95% CL, 2.03, 6.52). Both studies supported a significant association of OSA symptoms and TMD, with prospective cohort evidence finding that OSA symptoms preceded first-onset TMD.
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Affiliation(s)
- A E Sanders
- University of North Carolina at Chapel Hill, Koury Oral Health Sciences Building, 385 South Columbia Street, Chapel Hill, NC 27599-7450, USA.
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Miaskowski C, Cooper B, Paul SM, West C, Langford D, Levine JD, Abrams G, Hamolsky D, Dunn L, Dodd M, Neuhaus J, Baggott C, Dhruva A, Schmidt B, Cataldo J, Merriman J, Aouizerat BE. Identification of patient subgroups and risk factors for persistent breast pain following breast cancer surgery. THE JOURNAL OF PAIN 2012; 13:1172-87. [PMID: 23182226 PMCID: PMC3511823 DOI: 10.1016/j.jpain.2012.09.013] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Revised: 08/10/2012] [Accepted: 09/10/2012] [Indexed: 01/07/2023]
Abstract
UNLABELLED Study purposes were to determine the prevalence of persistent pain in the breast; characterize distinct persistent pain classes using growth mixture modeling; and evaluate for differences among these pain classes in demographic, preoperative, intraoperative, and postoperative characteristics. In addition, differences in the severity of common symptoms and quality of life outcomes measured prior to surgery, among the pain classes, were evaluated. Patients (n = 398) were recruited prior to surgery and followed for 6 months. Using growth mixture modeling, patients were classified into no (31.7%), mild (43.4%), moderate (13.3%), and severe (11.6%) pain groups based on ratings of worst breast pain. Differences in a number of demographic, preoperative, intraoperative, and postoperative characteristics differentiated among the pain classes. In addition, patients in the moderate and severe pain classes reported higher preoperative levels of depression, anxiety, and sleep disturbance than the no pain class. Findings suggest that approximately 25% of women experience significant and persistent levels of breast pain in the first 6 months following breast cancer surgery. PERSPECTIVE Persistent pain is a significant problem for 25% of women following surgery for breast cancer. Severe breast pain is associated with clinically meaningful decrements in functional status and quality of life.
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Olsen RB, Bruehl S, Nielsen CS, Rosseland LA, Eggen AE, Stubhaug A. Hypertension prevalence and diminished blood pressure-related hypoalgesia in individuals reporting chronic pain in a general population: the Tromsø study. Pain 2012; 154:257-262. [PMID: 23245863 DOI: 10.1016/j.pain.2012.10.020] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 09/21/2012] [Accepted: 10/29/2012] [Indexed: 11/29/2022]
Abstract
Resting blood pressure (BP) is inversely related to pain sensitivity in individuals free of chronic pain, reflecting homeostatic interactions between cardiovascular and pain modulatory systems. Several laboratory studies indicate that BP-related hypoalgesia is diminished in chronic pain patients, suggesting dysfunction in these interacting systems. Separate epidemiological findings reveal elevated hypertension prevalence in the chronic pain population. This study for the first time simultaneously evaluated both hypertension prevalence and BP-related hypoalgesia as they relate to chronic pain in the same sample. Resting BP and pain sensitivity were evaluated in a large general population sample (n=10,135, aged 30-87years). Subjects participated in a standardized 106s cold pressor test, providing pain ratings at 9s intervals. Self-reported presence of chronic pain and history of hypertension and use of antihypertensive medication were assessed. Significant interactions between chronic pain status and resting systolic (P<.001) and diastolic BP (P<.001) on mean pain ratings were observed. These interactions were due to significant (P<.001) BP-related hypoalgesia in individuals free of chronic pain that was twice the magnitude of the hypoalgesia observed in the group reporting chronic pain. Presence of chronic pain was associated with significantly increased odds of comorbid hypertension (P<.001). Within the chronic pain group, higher chronic pain intensity was a significant predictor of positive hypertension status beyond the effects of traditional demographic risk factors (P<.05). Results are consistent with the hypothesis that increased hypertension risk in the chronic pain population might be linked in part to chronic pain-related dysfunction in interacting cardiovascular-pain modulatory systems.
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Affiliation(s)
- Roy Bjørkholt Olsen
- Department of Anesthesiology, Division of Emergencies and Critical Care, Oslo University Hospital, Rikshospitalet, Oslo, Norway Department of Anesthesiology, Vanderbilt University School of Medicine, Nashville, TN, USA Division of Mental Health, Norwegian Institute of Public Health, Oslo, Norway Faculty of Medicine, University of Oslo, Norway Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway Department of Pain Management and Research, Division of Emergencies and Critical Care, Oslo University Hospital, Norway
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Maixner W, Greenspan JD, Dubner R, Bair E, Mulkey F, Miller V, Knott C, Slade GD, Ohrbach R, Diatchenko L, Fillingim RB. Potential autonomic risk factors for chronic TMD: descriptive data and empirically identified domains from the OPPERA case-control study. THE JOURNAL OF PAIN 2012; 12:T75-91. [PMID: 22074754 DOI: 10.1016/j.jpain.2011.09.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 09/01/2011] [Indexed: 10/15/2022]
Abstract
UNLABELLED Several case-control studies have been conducted that examine the association between autonomic variables and persistent pain conditions; however, there is a surprising dearth of published studies in this area that have focused on temporomandibular disorders (TMD). The current study presents autonomic findings from the baseline case-control study of the OPPERA (Orofacial Pain: Prospective Evaluation and Risk Assessment) cooperative agreement. Measures of arterial blood pressure, heart rate, heart rate variability, and indirect measures of baroreflex sensitivity were assessed at rest and in response to a physical (orthostatic) and psychological (Stroop) stressors in 1,633 TMD-free controls and 185 TMD cases. In bivariate and demographically adjusted analyses, greater odds of TMD case status were associated with elevated heart rates, reduced heart rate variability, and reduced surrogate measures of baroreflex sensitivity across all experimental procedures. Principal component analysis was undertaken to identify latent constructs revealing 5 components. These findings provide evidence of associations between autonomic factors and TMD. Future prospective analyses in the OPPERA cohort will determine if the presence of these autonomic factors predicts increased risk for developing new onset TMD. PERSPECTIVE This article reports autonomic findings from the OPPERA Study, a large prospective cohort study designed to discover causal determinants of TMD pain. Findings indicate statistically significant differences between TMD cases and controls across multiple autonomic constructs at rest and during both physical and psychologically challenging conditions. Future analyses will determine whether these autonomic factors increase risk for new onset TMD.
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Affiliation(s)
- William Maixner
- Department of Endodontics, Center for Neurosensory Disorders, University of North Carolina at Chapel Hill, North Carolina 27599-7455, USA. dentistry.unc.edu
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Greenspan JD, Slade GD, Bair E, Dubner R, Fillingim RB, Ohrbach R, Knott C, Mulkey F, Rothwell R, Maixner W. Pain sensitivity risk factors for chronic TMD: descriptive data and empirically identified domains from the OPPERA case control study. THE JOURNAL OF PAIN 2012; 12:T61-74. [PMID: 22074753 DOI: 10.1016/j.jpain.2011.08.006] [Citation(s) in RCA: 152] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 06/24/2011] [Indexed: 12/28/2022]
Abstract
UNLABELLED Many studies report that people with temporomandibular disorders (TMD) are more sensitive to experimental pain stimuli than TMD-free controls. Such differences in sensitivity are observed in remote body sites as well as in the orofacial region, suggesting a generalized upregulation of nociceptive processing in TMD cases. This large case-control study of 185 adults with TMD and 1,633 TMD-free controls measured sensitivity to painful pressure, mechanical cutaneous, and heat stimuli, using multiple testing protocols. Based on an unprecedented 36 experimental pain measures, 28 showed statistically significantly greater pain sensitivity in TMD cases than controls. The largest effects were seen for pressure pain thresholds at multiple body sites and cutaneous mechanical pain threshold. The other mechanical cutaneous pain measures and many of the heat pain measures showed significant differences, but with lesser effect sizes. Principal component analysis (PCA) of the pain measures derived from 1,633 controls identified 5 components labeled: 1) heat pain ratings; 2) heat pain aftersensations and tolerance; 3) mechanical cutaneous pain sensitivity; 4) pressure pain thresholds; and 5) heat pain temporal summation. These results demonstrate that compared to TMD-free controls, chronic TMD cases are more sensitive to many experimental noxious stimuli at extracranial body sites, and provide for the first time the ability to directly compare the case-control effect sizes of a wide range of pain sensitivity measures. PERSPECTIVE This article describes experimental pain sensitivity differences between a large sample of people with chronic TMD and non-TMD controls, using multiple stimulus modalities and measures. Variability in the magnitude and consistency of case-control differences highlight the need to consider multiple testing measures to adequately assess pain processing alterations in chronic pain conditions.
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Affiliation(s)
- Joel D Greenspan
- Department of Neural and Pain Sciences, and Brotman Facial Pain Center, University of Maryland Dental School, Baltimore, Maryland 21201, USA.
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Mohn C, Vassend O, Knardahl S. Cardiovascular responses to and modulation of pressure pain sensitivity in normotensive, pain-free women. Scand J Pain 2012; 3:165-169. [PMID: 29913830 DOI: 10.1016/j.sjpain.2011.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 12/19/2011] [Indexed: 12/29/2022]
Abstract
Background and purpose The psychophysiological responses to and modulation of pressure pain stimulation are relatively new areas of investigation. The aims of the present study were to characterize subjective and cardiovascular (CV) responses to pressure pain stimulation, and to examine the relationship between CV responding and pain pressure pain sensitivity. Methods Thirty-nine pain-free, normotensive women were included in the study and tested during the follicular phase of their menstrual cycles. Pain threshold and tolerance were recorded at the right masseter muscle and the sternum, and visual analogue scales (VAS) were used to rate both pain intensity (the sensory dimension) and discomfort (the affective dimension). Mean arterial pressure (MAP), heart rate (HR), and facial and digital skin blood flux (SBF) were registered continuously. Results The pain threshold and tolerance were significantly higher at the sternum compared with the masseter, but the level of affective distress was higher at the masseter tolerance point. No associations emerged between pressure pain threshold and tolerance stimulation levels, and the corresponding VAS ratings. Pressure pain stimulation of the masseter induced significant increases in MAP, HR, and a decrease in digital SBF. During sternum pressure stimulation a significant change in HR and digital SBF was observed. There were no significant correlations between CV responding and pressure pain sensitivity. Conclusion Healthy women seem to display higher pressure pain sensitivity at the masseter region relative to the sternum. Pressure pain stimulation was associated with significant changes in MAP, HR, and SBF, but was not modulated by CV responses. The validity of these findings is strengthened by our control for menstrual cycle events, weekend-related changes in physiology, and CV changes during pain stimulation. Implications This study extends previous reports of SBF sensitivity to electrocutaneous pain into the field of pressure stimulation. Moreover, this study suggests that the often demonstrated association between high BP and low pain sensitivity may not apply to pressure pain specifically. Alternatively, this finding adds to the literature of gender differences in the relationship between CV responding and acute pain sensitivity in general.
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Affiliation(s)
- Christine Mohn
- Department of Psychology, University of Oslo, Oslo, Norway.,Department of Research, Vestre Viken Hospital Trust, Oslo, Norway
| | - Olav Vassend
- Department of Psychology, University of Oslo, Oslo, Norway
| | - Stein Knardahl
- Department of Work Psychology and Physiology, The National Institute of Occupational Health, Oslo, Norway
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Breivik H. Why are autonomic responses to pressure pain different from those to heat pain and ischaemic pain? Scand J Pain 2012; 3:164. [PMID: 29913845 DOI: 10.1016/j.sjpain.2012.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Harald Breivik
- University of Oslo and Oslo University Hospital, Department of Pain Management and Pain Research, Oslo, Norway
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White matter brain and trigeminal nerve abnormalities in temporomandibular disorder. Pain 2012; 153:1467-1477. [DOI: 10.1016/j.pain.2012.04.003] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Revised: 02/22/2012] [Accepted: 04/05/2012] [Indexed: 12/12/2022]
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Basson R. The recurrent pain and sexual sequelae of provoked vestibulodynia: a perpetuating cycle. J Sex Med 2012; 9:2077-92. [PMID: 22672388 DOI: 10.1111/j.1743-6109.2012.02803.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Optimal management of provoked vestibulodynia (PVD), thought to be the most common form of chronic dyspareunia, is unclear. AIM To integrate recent brain data on chronic pain circuitry with stress-induced neuroendocrine mechanisms in the skin and the stress burden (allostatic load) of women with PVD; to also clarify the typical chronicity and negative sexual sequelae associated with PVD; and then review modulation of pain circuitry by cognitive therapy and mindfulness practice and apply to PVD management. Methods. Review of scientific publications in the areas of sexual medicine, pain, brain imaging, gynecology, stress response, mindfulness, and cognitive behavioral therapy (CBT). MAIN OUTCOME MEASURES (i) A model of PVD to reflect its etiology, typical chronicity, and the detrimental effects on sexual function; (ii) Interventions of sexual rehabilitation based on principles underlying changes associated with CBT and mindfulness practice. RESULTS A model emerges which reflects how stress-induced changes of pain amplification (central sensitization), characteristic of chronic pain conditions, may impair sexual response in addition to sexual dysfunction that arises from conscious pain avoidance and/or fear-related inattention to sexual cues. Stress from low self-acceptance may be a major component of the allostatic load present in women with PVD, only to be exacerbated by the sexual dysfunction precipitated by the pain of intercourse. Mindfulness-based CBT appears promising to target both the pain and sexual suffering from PVD. CONCLUSION New findings on brain activity associated with recurrent clinical pain, functional brain changes associated with CBT and mindfulness, plus new data on stress systems within the skin along with data on increased stress load in women with PVD, support the use of mindfulness-based CBT for the recurrent pain and sexual suffering from PVD.
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Affiliation(s)
- Rosemary Basson
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada.
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Franco AL, Runho GHF, Siqueira JTTD, Camparis CM. Medical conditions and body pain in patients presenting orofacial pain. ARQUIVOS DE NEURO-PSIQUIATRIA 2012; 70:348-51. [PMID: 22618786 DOI: 10.1590/s0004-282x2012000500008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2012] [Accepted: 01/10/2012] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To verify the frequency of self-reported medical conditions and pain areas in orofacial pain patients, comparing them with patients from the routine dental care. METHODS Data were collected from archives of the Orofacial Pain Clinic (Group A, n=319) and of the routine dental care clinics (Group B, n=84) at Faculdade de Odontologia de Araraquara, São Paulo, in Brazil. All individuals answered a standardized clinical questionnaire and completed a body map indicating their pain areas. RESULTS The Mann-Whitney's test demonstrated that Group A presented a higher mean number of medical reports than Group B (p=0.004). In both groups, Pearson's correlation test showed that the highest frequencies of medical conditions were positively correlated to highest frequencies of painful areas (0.478, p=0.001 and 0.246, p=0.000, respectively). CONCLUSIONS Group A tended to report more medical conditions and there was a positive correlation between the number of medical conditions and the one of pain areas for both groups.
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Affiliation(s)
- Ana Lúcia Franco
- Department of Dental Materials and Prosthodontics, Dental School, Universidade Estadual Paulista, Araraquara, SP, Brazil.
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Buscher HCJL, Lenders JWM, Wilder-Smith OHG, Sweep CGJ, van Goor H. Bilateral thoracoscopic splanchnicectomy for pain in patients with chronic pancreatitis impairs adrenomedullary but not noradrenergic sympathetic function. Surg Endosc 2012; 26:2183-8. [PMID: 22395951 PMCID: PMC3392509 DOI: 10.1007/s00464-012-2152-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Accepted: 12/20/2011] [Indexed: 12/11/2022]
Abstract
Background Bilateral thoracoscopic splanchnicectomy (BTS) is a well-known technique to alleviate intractable pain in patients with chronic pancreatitis. BTS not only disrupts afferent fibers from the pancreas that mediate pain but also postganglionic sympathetic fibers, which originate in segments T5–T12 and which innervate the vasculature of the liver, pancreas, and the adrenal gland. The purpose of this study was to assess whether and how BTS affects sympathetic noradrenergic and adrenomedullary function in patients with chronic pancreatitis. Methods Sixteen patients with chronic pancreatitis for at least 1 year underwent autonomic function testing before and 6 weeks after BTS for intractable pain. Testing was performed during supine rest and during sympathetic stimulation when standing. Results Supine and standing systolic and diastolic blood pressure were significantly lower post-BTS compared with pre-BTS (P = 0.001). One patient showed orthostatic hypotension after BTS. Baseline plasma norepinephrine levels and plasma norepinephrine responses to sympathetic activation during standing were not reduced by BTS. In contrast, supine plasma epinephrine levels and responses during standing were significantly reduced (P < 0.001). Parasympathetic activity was unaffected by BTS as shown by unaltered Valsalva ratio, I-E difference, and ΔHRmax. Conclusions BTS for pain relief in patients with chronic pancreatitis reduced adrenomedullary function, due to disruption of the efferent sympathetic fibers to the adrenal gland. BTS did not affect noradrenergic sympathetic activity, although blood pressure was lower after the sympathectomy.
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Affiliation(s)
- H C J L Buscher
- Department of Surgery, Radboud University Nijmegen Medical Centre, P.O. Box 9100, 6500 HB Nijmegen, The Netherlands
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