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Verriotis M, Sorger C, Peters J, Ayoub LJ, Seunarine KK, Clark CA, Walker SM, Moayedi M. Amygdalar Functional Connectivity Differences Associated With Reduced Pain Intensity in Pediatric Peripheral Neuropathic Pain. FRONTIERS IN PAIN RESEARCH 2022; 3:918766. [PMID: 35692562 PMCID: PMC9184677 DOI: 10.3389/fpain.2022.918766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 05/05/2022] [Indexed: 11/13/2022] Open
Abstract
Background There is evidence of altered corticolimbic circuitry in adults with chronic pain, but relatively little is known of functional brain mechanisms in adolescents with neuropathic pain (NeuP). Pediatric NeuP is etiologically and phenotypically different from NeuP in adults, highlighting the need for pediatric-focused research. The amygdala is a key limbic region with important roles in the emotional-affective dimension of pain and in pain modulation. Objective To investigate amygdalar resting state functional connectivity (rsFC) in adolescents with NeuP. Methods This cross-sectional observational cohort study compared resting state functional MRI scans in adolescents aged 11–18 years with clinical features of chronic peripheral NeuP (n = 17), recruited from a tertiary clinic, relative to healthy adolescents (n = 17). We performed seed-to-voxel whole-brain rsFC analysis of the bilateral amygdalae. Next, we performed post hoc exploratory correlations with clinical variables to further explain rsFC differences. Results Adolescents with NeuP had stronger negative rsFC between right amygdala and right dorsolateral prefrontal cortex (dlPFC) and stronger positive rsFC between right amygdala and left angular gyrus (AG), compared to controls (PFDR<0.025). Furthermore, lower pain intensity correlated with stronger negative amygdala-dlPFC rsFC in males (r = 0.67, P = 0.034, n = 10), and with stronger positive amygdala-AG rsFC in females (r = −0.90, P = 0.006, n = 7). These amygdalar rsFC differences may thus be pain inhibitory. Conclusions Consistent with the considerable affective and cognitive factors reported in a larger cohort, there are rsFC differences in limbic pain modulatory circuits in adolescents with NeuP. Findings also highlight the need for assessing sex-dependent brain mechanisms in future studies, where possible.
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Affiliation(s)
- Madeleine Verriotis
- Paediatric Pain Research Group, Developmental Neurosciences Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
- Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
- *Correspondence: Madeleine Verriotis
| | - Clarissa Sorger
- Paediatric Pain Research Group, Developmental Neurosciences Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
- Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Judy Peters
- Paediatric Pain Research Group, Developmental Neurosciences Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
- Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Lizbeth J. Ayoub
- Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, Toronto, ON, Canada
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
- University of Toronto Centre for the Study of Pain, Toronto, ON, Canada
- Division of Clinical and Computational Neuroscience, Krembil Brain Institute, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
| | - Kiran K. Seunarine
- Developmental Imaging and Biophysics Section, Developmental Neurosciences Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Chris A. Clark
- Developmental Imaging and Biophysics Section, Developmental Neurosciences Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Suellen M. Walker
- Paediatric Pain Research Group, Developmental Neurosciences Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
- Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Massieh Moayedi
- Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, Toronto, ON, Canada
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
- University of Toronto Centre for the Study of Pain, Toronto, ON, Canada
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Lee B, Di Pietro F, Henderson LA, Austin PJ. Altered basal ganglia infraslow oscillation and resting functional connectivity in complex regional pain syndrome. J Neurosci Res 2022; 100:1487-1505. [PMID: 35441738 PMCID: PMC9543905 DOI: 10.1002/jnr.25057] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 04/03/2022] [Accepted: 04/05/2022] [Indexed: 11/06/2022]
Abstract
Complex regional pain syndrome (CRPS) is a painful condition commonly accompanied by movement disturbances and often affects the upper limbs. The basal ganglia motor loop is central to movement, however, non-motor basal ganglia loops are involved in pain, sensory integration, visual processing, cognition, and emotion. Systematic evaluation of each basal ganglia functional loop and its relation to motor and non-motor disturbances in CRPS has not been investigated. We recruited 15 upper limb CRPS and 45 matched healthy control subjects. Using functional magnetic resonance imaging, infraslow oscillations (ISO) and resting-state functional connectivity in motor and non-motor basal ganglia loops were investigated using putamen and caudate seeds. Compared to controls, CRPS subjects displayed increased ISO power in the putamen contralateral to the CRPS affected limb, specifically, in contralateral putamen areas representing the supplementary motor area hand, motor hand, and motor tongue. Furthermore, compared to controls, CRPS subjects displayed increased resting connectivity between these putaminal areas as well as from the caudate body to cortical areas such as the primary motor cortex, supplementary and cingulate motor areas, parietal association areas, and the orbitofrontal cortex. These findings demonstrate changes in basal ganglia loop function in CRPS subjects and may underpin motor disturbances of CRPS.
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Affiliation(s)
- Barbara Lee
- School of Medical Sciences and Brain and Mind Centre, University of Sydney, Camperdown, New South Wales, Australia
| | - Flavia Di Pietro
- Curtin Medical School, Faculty of Health Sciences, Curtin University, Bentley, Western Australia, Australia.,Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia
| | - Luke A Henderson
- School of Medical Sciences and Brain and Mind Centre, University of Sydney, Camperdown, New South Wales, Australia
| | - Paul J Austin
- School of Medical Sciences and Brain and Mind Centre, University of Sydney, Camperdown, New South Wales, Australia
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Zangrandi A, Allen Demers F, Schneider C. Complex Regional Pain Syndrome. A Comprehensive Review on Neuroplastic Changes Supporting the Use of Non-invasive Neurostimulation in Clinical Settings. FRONTIERS IN PAIN RESEARCH 2021; 2:732343. [PMID: 35295500 PMCID: PMC8915550 DOI: 10.3389/fpain.2021.732343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 08/23/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Complex regional pain syndrome (CRPS) is a rare debilitating disorder characterized by severe pain affecting one or more limbs. CRPS presents a complex multifactorial physiopathology. The peripheral and sensorimotor abnormalities reflect maladaptive changes of the central nervous system. These changes of volume, connectivity, activation, metabolism, etc., could be the keys to understand chronicization, refractoriness to conventional treatment, and developing more efficient treatments. Objective: This review discusses the use of non-pharmacological, non-invasive neurostimulation techniques in CRPS, with regard to the CRPS physiopathology, brain changes underlying chronicization, conventional approaches to treat CRPS, current evidence, and mechanisms of action of peripheral and brain stimulation. Conclusion: Future work is warranted to foster the evidence of the efficacy of non-invasive neurostimulation in CRPS. It seems that the approach has to be individualized owing to the integrity of the brain and corticospinal function. Non-invasive neurostimulation of the brain or of nerve/muscles/spinal roots, alone or in combination with conventional therapy, represents a fertile ground to develop more efficient approaches for pain management in CRPS.
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Affiliation(s)
- Andrea Zangrandi
- Noninvasive Neurostimulation Laboratory (NovaStim), Quebec City, QC, Canada
- Neuroscience Division of Centre de Recherche du CHU of Québec, Université Laval, Quebec City, QC, Canada
- Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Fannie Allen Demers
- Noninvasive Neurostimulation Laboratory (NovaStim), Quebec City, QC, Canada
- Neuroscience Division of Centre de Recherche du CHU of Québec, Université Laval, Quebec City, QC, Canada
- Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Cyril Schneider
- Noninvasive Neurostimulation Laboratory (NovaStim), Quebec City, QC, Canada
- Neuroscience Division of Centre de Recherche du CHU of Québec, Université Laval, Quebec City, QC, Canada
- Faculty of Medicine, Université Laval, Quebec City, QC, Canada
- Department Rehabilitation, Université Laval, Quebec City, QC, Canada
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Abstract
Complex regional pain syndrome (CRPS) develops after-limb injury, with persistent pain and deficits in movement frequently co-occurring. The striatum is critical for mediating multiple mechanisms that are often aberrant in CRPS, which includes sensory and pain processing, motor function, and goal-directed behaviors associated with movement. Yet, much remains unknown with regards to the morphological and functional properties of the striatum and its subregions in this disease. Thus, we investigated 20 patients (15 female, age 58 ± 9 years, right-handed) diagnosed with chronic (6+ months of pain duration) CRPS in the right hand and 20 matched, healthy controls with anatomical and resting-state, functional magnetic resonance imaging. In addition, a comprehensive clinical and behavioral evaluation was performed, where each participant's pain, motor function, and medical history were assessed. Complex regional pain syndrome patients harbored significant abnormalities in hand coordination, dexterity, and strength. These clinical pain- and movement-related findings in CRPS patients were concomitant with bilateral decreases in gray matter density in the putamen as well as functional connectivity increases and decreases among the putamen and pre-/postcentral gyri and cerebellum, respectively. Importantly, higher levels of clinical pain and motor impairment were associated with increased putamen-pre-/postcentral gyri functional connectivity strengths. Collectively, these findings suggest that putaminal alterations, specifically the functional interactions with sensorimotor structures, may underpin clinical pain and motor impairment in chronic CRPS patients.
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Lee SH, Ko MJ, Nam TK, Kwon JT, Park YS. Impact of adolescent complex regional pain syndrome on the psychopathology of young men ahead of military service: a retrospective cohort analysis of Korean conscription data. Mil Med Res 2020; 7:62. [PMID: 33342440 PMCID: PMC7751098 DOI: 10.1186/s40779-020-00294-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 12/09/2020] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND The relationship between physical and psychopathological features in complex regional pain syndrome (CRPS) has been a subject of constant interest, but no data are available in adolescents. Therefore, we aimed to identify the factors associated with psychopathology in adolescents with CRPS ahead of military service. METHODS We retrospectively reviewed all conscription examinees who had completed a Military Personality Inventory (MPI) during a period between February 2013 and December 2016. A total of 63 persons with a history of CRPS (19-years of age for all) were enrolled. Basic demographic and pain-related data were analyzed to examine their association with MPI results. The mean FGR score as well as the 8 subdomain scores were compared between those with pain duration at < 15 months (n = 30) versus ≥15 months (n = 33). Binary MPI results (normal-abnormal) were also compared between the two groups. RESULTS In multivariate analysis, abnormal MPI was associated with pain duration, with an odds ratio (OR) at 1.05 for every 1-month increase (95% confidence interval (CI) 1.02-1.08; P = 0.002). Subjects with pain duration at ≥15 months have lower faking good response score (P < 0.001 vs. those with pain duration at < 15 months), and higher abnormal MPI result rate, faking bad response, inconsistency, anxiety, depression, somatization, paranoid, personality disorder cluster A, and personality disorder cluster B scores (P < 0.05). Pain duration was significantly associated with the MPI variables. CONCLUSIONS Pain duration is associated with psychopathology in adolescents with CRPS. Psychopathologic features increased as the disease duration increased. A comprehensive understanding of time-dependent psychopathological factors could support the planning of multimodal approaches for managing adolescent CRPS.
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Affiliation(s)
- Shin-Heon Lee
- Department of Neurosurgery, College of Medicine, Chung-Ang University, Seoul, 06973, South Korea
| | - Myeong-Jin Ko
- Department of Neurosurgery, College of Medicine, Chung-Ang University, Seoul, 06973, South Korea
| | - Taek-Kyun Nam
- Department of Neurosurgery, College of Medicine, Chung-Ang University, Seoul, 06973, South Korea
| | - Jeong-Taik Kwon
- Department of Neurosurgery, College of Medicine, Chung-Ang University, Seoul, 06973, South Korea
| | - Yong-Sook Park
- Department of Neurosurgery, College of Medicine, Chung-Ang University, Seoul, 06973, South Korea.
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Vescio A, Testa G, Culmone A, Sapienza M, Valenti F, Di Maria F, Pavone V. Treatment of Complex Regional Pain Syndrome in Children and Adolescents: A Structured Literature Scoping Review. CHILDREN-BASEL 2020; 7:children7110245. [PMID: 33233634 PMCID: PMC7699814 DOI: 10.3390/children7110245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/05/2020] [Accepted: 11/18/2020] [Indexed: 01/11/2023]
Abstract
Background: Complex regional pain syndrome (CRPS) is characterized by chronic, spontaneous and provoked pain of the distal extremities whose severity is disproportionate to the triggering event. Diagnosis and treatment are still debated and multidisciplinary. The purpose of this systematic review is to analyze the available literature to provide an update on the latest evidence related to the treatment of CRPS in growing age. Methods: Data extraction was performed independently by three reviewers based on predefined criteria and the methodologic quality of included studies was quantified by the Newcastle–Ottawa Quality Assessment Scale Cohort Studies. Results: At the end of the first screening, following the previously described selection criteria, we selected n = 103 articles eligible for full-text reading. Ultimately, after full-text reading and a reference list check, we selected n = 6. The articles focused on physical (PT), associated with cognitive behavioral (CBT) and pharmacological (PhT) treatments. The combination of PT + CBT shows the most efficacy as suggested, but a commonly accepted protocol has not been developed. Conclusions: Physical therapy in association with occupational and cognitive behavioral treatment is the recommended option in the management of pediatric CPRS. Pharmacological therapy should be reserved for refractory and selected patients. The design and development of a standard protocol are strongly suggested.
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Zernikow B. [Rare is frequent! Pain and pain therapy in rare diseases]. Schmerz 2020; 34:373-375. [PMID: 32960379 DOI: 10.1007/s00482-020-00505-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- B Zernikow
- Deutsches Kinderschmerzzentrum und Kinderpalliativzentrum Datteln, Vestische Kinder- und Jugendklinik Datteln, Lehrstuhl für Kinderschmerztherapie und Pädiatrische Palliativmedizin, Universität Witten/Herdecke, Dr.-Friedrich-Steiner-Str. 5, 45711, Datteln, Deutschland.
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Jones SA, Morales AM, Holley AL, Wilson AC, Nagel BJ. Default mode network connectivity is related to pain frequency and intensity in adolescents. NEUROIMAGE-CLINICAL 2020; 27:102326. [PMID: 32634754 PMCID: PMC7338779 DOI: 10.1016/j.nicl.2020.102326] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/09/2020] [Accepted: 06/21/2020] [Indexed: 01/23/2023]
Abstract
Pain symptoms in adolescents are associated with default mode network connectivity. More frequent pain is associated with more connectivity to the superior frontal gyrus. Higher pain intensity is associated with less connectivity to the cerebellum.
Pain during adolescence is common and is associated with future pain chronicity and mental health in adulthood. However, understanding of the neural underpinnings of chronic pain has largely come from studies in adults, with recent studies in adolescents suggesting potentially unique neural features during this vulnerable developmental period. In addition to alterations in the pain network, resting state functional magnetic resonance imaging studies in adults suggest alterations in the default mode network (DMN), involved in internally-driven, self-referential thought, may underlie chronic pain; however, these findings have yet to be examined in adolescents. The current study sought to investigate associations between pain frequency and intensity, and disruptions in DMN connectivity, in adolescents. Adolescents (ages 12–20) with varying levels of pain frequency and intensity, recruited from a pediatric pain clinic and the local community (n = 86; 60% female), underwent resting state functional magnetic resonance imaging. Using independent components analysis, the DMN was identified and correlated voxel-wise to assess associations between pain frequency and intensity and DMN connectivity. Findings revealed that adolescents with greater pain frequency demonstrated greater DMN to superior frontal gyrus connectivity, while adolescents with greater pain intensity demonstrated lesser DMN to cerebellum (lobule VIII) connectivity, during rest. These findings suggest that increasing levels of pain are associated with potential desegregation of the DMN and the prefrontal cortex, important for cognitive control, and with novel patterns of DMN to cerebellum connectivity. These findings may prove beneficial as neurobiological targets for future treatment efforts in adolescents.
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Affiliation(s)
- Scott A Jones
- Department of Psychiatry, Oregon Health & Science University, Portland, OR, USA
| | - Angelica M Morales
- Department of Psychiatry, Oregon Health & Science University, Portland, OR, USA
| | - Amy L Holley
- Department of Pediatrics, Oregon Health & Science University, Portland, OR, USA
| | - Anna C Wilson
- Department of Pediatrics, Oregon Health & Science University, Portland, OR, USA
| | - Bonnie J Nagel
- Department of Psychiatry, Oregon Health & Science University, Portland, OR, USA; Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, USA.
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The feasibility and acceptability of research magnetic resonance imaging in adolescents with moderate-severe neuropathic pain. Pain Rep 2020; 5:e807. [PMID: 32072101 PMCID: PMC7004507 DOI: 10.1097/pr9.0000000000000807] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 11/14/2019] [Accepted: 11/27/2019] [Indexed: 11/26/2022] Open
Abstract
Supplemental Digital Content is Available in the Text. Introduction: Multimodal characterisation with questionnaires, Quantitative Sensory Testing (QST), and neuroimaging will improve understanding of neuropathic pain (NeuP) in adolescents. Magnetic resonance imaging (MRI) data in adolescents with NeuP are limited, and the perceived practical or ethical burden of scanning may represent a barrier to research. Objective: To determine the feasibility of MRI scanning in adolescents with moderate–severe NeuP, with respect to consent rate, postscan acceptability, and data quality. Methods: This prospective cohort study evaluating questionnaires and QST recruited adolescents aged 10 to 18 years with clinically diagnosed NeuP from a tertiary clinic. Eligible adolescents aged 11 years and older could additionally agree/decline an MRI scan. After the scan, families rated discomfort, perceived risk, and acceptability of current and future MRI scans (0–10 numerical rating scales). Head motion during scanning was compared with healthy controls to assess data quality. Results: Thirty-four families agreed to MRI (72% recruitment), and 21 adolescents with moderate–severe pain (average last week 6.7 ± 1.7; mean ± SD) and with neuropathic QST profiles were scanned. Three adolescents reported positional or noise-related discomfort during scanning. Perceived risk was low, and acceptability of the current scan was high for parents (range [median]: 7 to 10/10 [10]) and adolescents (8–10/10 [10]). Willingness to undergo a future research scan was high for parents (7–10/10 [10]) and adolescents (5–10/10 [10]) and did not differ from future scans for clinical purposes. Mean head motion during resting state functional MRI did not differ from control adolescents. Conclusion: Research MRI is feasible and acceptable for many adolescents with moderate–severe NeuP.
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10
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Walker LS. Commentary: Understanding Somatic Symptoms: From Dualism to Systems, Diagnosis to Dimensions, Clinical Judgement to Clinical Science. J Pediatr Psychol 2019; 44:862-867. [PMID: 31241136 DOI: 10.1093/jpepsy/jsz050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/24/2019] [Accepted: 05/15/2019] [Indexed: 11/14/2022] Open
Affiliation(s)
- Lynn S Walker
- Department of Pediatrics, Monroe Carell Jr. Children's Hospital at Vanderbilt, Vanderbilt University Medical Center
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Christensen J, Noel M, Mychasiuk R. Neurobiological mechanisms underlying the sleep-pain relationship in adolescence: A review. Neurosci Biobehav Rev 2019; 96:401-413. [PMID: 30621863 DOI: 10.1016/j.neubiorev.2018.11.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 11/14/2018] [Accepted: 11/15/2018] [Indexed: 12/20/2022]
Abstract
Adolescence characterizes a period of significant change in brain structure and function, causing the neural circuitry to be particularly susceptible to the environment and various other experiences. Chronic pain and sleep deprivation represent major health issues that plague adolescence. A bidirectional relationship exists between sleep and pain; however, emerging evidence suggests that sleep disturbances have a stronger influence on subsequent pain than vice versa. The neurobiological underpinnings of this relationship, particularly during adolescence, are poorly understood. This review examines the current literature regarding sleep and pain in adolescence, with a particular focus on the neurobiological mechanisms underlying pain, sleep problems, and the neural circuitry that potentially links the two. Finally, a research agenda is outlined to stimulate future research on this topic. Given the high prevalence of these health issues during adolescence and the debilitating effects they inflict on nearly every domain of development, it is crucial that we determine the neurobiological mechanisms fundamental to this relationship and identify potential therapeutic strategies.
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Affiliation(s)
- Jennaya Christensen
- Department of Psychology, University of Calgary, Calgary, Canada; Alberta Children's Hospital Research Institute, Canada; Hotchkiss Brain Institute, Canada
| | - Melanie Noel
- Department of Psychology, University of Calgary, Calgary, Canada; Alberta Children's Hospital Research Institute, Canada; Hotchkiss Brain Institute, Canada
| | - Richelle Mychasiuk
- Department of Psychology, University of Calgary, Calgary, Canada; Alberta Children's Hospital Research Institute, Canada; Hotchkiss Brain Institute, Canada.
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Greenwald JD, Shafritz KM. An Integrative Neuroscience Framework for the Treatment of Chronic Pain: From Cellular Alterations to Behavior. Front Integr Neurosci 2018; 12:18. [PMID: 29875641 PMCID: PMC5974053 DOI: 10.3389/fnint.2018.00018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 05/04/2018] [Indexed: 12/21/2022] Open
Abstract
Chronic pain can result from many pain syndromes including complex regional pain syndrome (CRPS), phantom limb pain and chronic low back pain, among others. On a molecular level, chronic pain syndromes arise from hypersensitization within the dorsal horn of the spinal cord, a process known as central sensitization. Central sensitization involves an upregulation of ionotropic and metabotropic glutamate receptors (mGluRs) similar to that of long-term potentiation (LTP). Regions of the brain in which LTP occurs, such as the amygdala and hippocampus, are implicated in fear- and memory-related brain circuity. Chronic pain dramatically influences patient quality of life. Individuals with chronic pain may develop pain-related anxiety and pain-related fear. The syndrome also alters functional connectivity in the default-mode network (DMN) and salience network. On a cellular/molecular level, central sensitization may be reversed through degradative glutamate receptor pathways. This, however, rarely happens. Instead, cortical brain regions may serve in a top-down regulatory capacity for the maintenance or alleviation of pain. Specifically, the medial prefrontal cortex (mPFC), which plays a critical role in fear-related brain circuits, the DMN, and salience network may be the driving forces in this process. On a cellular level, the mPFC may form new neural circuits through LTP that may cause extinction of pre-existing pain pathways found within fear-related brain circuits, the DMN, and salience network. In order to promote new LTP connections between the mPFC and other key brain structures, such as the amygdala and insula, we propose a holistic rehabilitation program including cognitive behavioral therapy (CBT) and revolving around: (1) cognitive reappraisals; (2) mindfulness meditation; and (3) functional rehabilitation. Unlike current medical interventions focusing upon pain-relieving medications, we do not believe that chronic pain treatment should focus on reversing the effects of central sensitization. Instead, we propose here that it is critical to focus on non-invasive efforts to promote new neural circuits originating from the mPFC.
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Affiliation(s)
- Jess D. Greenwald
- Department of Psychology, Hofstra University, Hempstead, NY, United States
| | - Keith M. Shafritz
- Department of Psychology, Hofstra University, Hempstead, NY, United States
- Center for Psychiatric Neuroscience, The Feinstein Institute for Medical Research, Manhasset, NY, United States
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Smith SM, Dworkin RH, Turk DC, Baron R, Polydefkis M, Tracey I, Borsook D, Edwards RR, Harris RE, Wager TD, Arendt-Nielsen L, Burke LB, Carr DB, Chappell A, Farrar JT, Freeman R, Gilron I, Goli V, Haeussler J, Jensen T, Katz NP, Kent J, Kopecky EA, Lee DA, Maixner W, Markman JD, McArthur JC, McDermott MP, Parvathenani L, Raja SN, Rappaport BA, Rice ASC, Rowbotham MC, Tobias JK, Wasan AD, Witter J. The Potential Role of Sensory Testing, Skin Biopsy, and Functional Brain Imaging as Biomarkers in Chronic Pain Clinical Trials: IMMPACT Considerations. THE JOURNAL OF PAIN 2017; 18:757-777. [PMID: 28254585 PMCID: PMC5484729 DOI: 10.1016/j.jpain.2017.02.429] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 01/19/2017] [Accepted: 02/16/2017] [Indexed: 02/08/2023]
Abstract
Valid and reliable biomarkers can play an important role in clinical trials as indicators of biological or pathogenic processes or as a signal of treatment response. Currently, there are no biomarkers for pain qualified by the U.S. Food and Drug Administration or the European Medicines Agency for use in clinical trials. This article summarizes an Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials meeting in which 3 potential biomarkers were discussed for use in the development of analgesic treatments: 1) sensory testing, 2) skin punch biopsy, and 3) brain imaging. The empirical evidence supporting the use of these tests is described within the context of the 4 categories of biomarkers: 1) diagnostic, 2) prognostic, 3) predictive, and 4) pharmacodynamic. Although sensory testing, skin punch biopsy, and brain imaging are promising tools for pain in clinical trials, additional evidence is needed to further support and standardize these tests for use as biomarkers in pain clinical trials. PERSPECTIVE The applicability of sensory testing, skin biopsy, and brain imaging as diagnostic, prognostic, predictive, and pharmacodynamic biomarkers for use in analgesic treatment trials is considered. Evidence in support of their use and outlining problems is presented, as well as a call for further standardization and demonstrations of validity and reliability.
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Azqueta-Gavaldon M, Schulte-Göcking H, Storz C, Azad S, Reiners A, Borsook D, Becerra L, Kraft E. Basal ganglia dysfunction in complex regional pain syndrome - A valid hypothesis? Eur J Pain 2016; 21:415-424. [DOI: 10.1002/ejp.975] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2016] [Indexed: 01/27/2023]
Affiliation(s)
- M. Azqueta-Gavaldon
- Interdisciplinary Pain Unit; Medical Centre of University of Munich; Germany
- Department of Orthopaedics, Physical Medicine and Rehabilitation; Medical Centre of University of Munich; Germany
| | - H. Schulte-Göcking
- Interdisciplinary Pain Unit; Medical Centre of University of Munich; Germany
- Department of Orthopaedics, Physical Medicine and Rehabilitation; Medical Centre of University of Munich; Germany
| | - C. Storz
- Department of Orthopaedics, Physical Medicine and Rehabilitation; Medical Centre of University of Munich; Germany
| | - S. Azad
- Interdisciplinary Pain Unit; Medical Centre of University of Munich; Germany
- Department of Anaesthesia; Medical Centre of University of Munich; Germany
| | - A. Reiners
- Department of Rehabilitation; City Hospital Bogenhausen; Munich Germany
| | - D. Borsook
- Centre for Pain and the Brain; Boston Children's Hospital; Harvard Medical School; Boston USA
| | - L. Becerra
- Centre for Pain and the Brain; Boston Children's Hospital; Harvard Medical School; Boston USA
| | - E. Kraft
- Interdisciplinary Pain Unit; Medical Centre of University of Munich; Germany
- Department of Orthopaedics, Physical Medicine and Rehabilitation; Medical Centre of University of Munich; Germany
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Decreased Brain Neurokinin-1 Receptor Availability in Chronic Tennis Elbow. PLoS One 2016; 11:e0161563. [PMID: 27658244 PMCID: PMC5033598 DOI: 10.1371/journal.pone.0161563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 08/08/2016] [Indexed: 12/28/2022] Open
Abstract
Substance P is released in painful and inflammatory conditions, affecting both peripheral processes and the central nervous system neurokinin 1 (NK1) receptor. There is a paucity of data on human brain alterations in NK1 expression, how this system may be affected by treatment, and interactions between central and peripheral tissue alterations. Ten subjects with chronic tennis elbow (lateral epicondylosis) were selected out of a larger (n = 120) randomized controlled trial evaluating graded exercise as a treatment for chronic tennis elbow (lateral epicondylosis). These ten subjects were examined by positron emission tomography (PET) with the NK1-specific radioligand 11C-GR205171 before, and eight patients were followed up after treatment with graded exercise. Brain binding in the ten patients before treatment, reflecting NK1-receptor availability (NK1-RA), was compared to that of 18 healthy subjects and, longitudinally, to the eight of the original ten patients that agreed to a second PET examination after treatment. Before treatment, patients had significantly lower NK1-RA in the insula, vmPFC, postcentral gyrus, anterior cingulate, caudate, putamen, amygdala and the midbrain but not the thalamus and cerebellum, with the largest difference in the insula contralateral to the injured elbow. No significant correlations between brain NK1-RA and pain, functional severity, or peripheral NK1-RA in the affected limb were observed. In the eight patients examined after treatment, pain ratings decreased in everyone, but there were no significant changes in NK1-RA. These findings indicate a role for the substance P (SP) / NK1 receptor system in musculoskeletal pain and tissue healing. As neither clinical parameters nor successful treatment response was reflected in brain NK1-RA after treatment, this may reflect the diverse function of the SP/NK1 system in CNS and peripheral tissue, or a change too small or slow to capture over the three-month treatment.
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16
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Brooks MR, Golianu B. Perioperative management in children with chronic pain. Paediatr Anaesth 2016; 26:794-806. [PMID: 27370517 DOI: 10.1111/pan.12948] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/27/2016] [Indexed: 12/28/2022]
Abstract
Children with chronic pain often undergo surgery and effective perioperative management of their pain can be challenging. Identification of the pediatric chronic pain patient preoperatively and development of a perioperative pain plan may help ensure a safer and more comfortable perioperative course. Successful management usually requires multiple different classes of analgesics, regional anesthesia, and adjunctive nonpharmacological therapies. Neuropathic and oncological pain can be especially difficult to treat and usually requires an individualized approach.
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Affiliation(s)
- Meredith R Brooks
- Department of Anesthesiology, Cook Children's Hospital, Fort Worth, TX, USA
| | - Brenda Golianu
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA, USA
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17
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Simons LE, Goubert L, Vervoort T, Borsook D. Circles of engagement: Childhood pain and parent brain. Neurosci Biobehav Rev 2016; 68:537-546. [PMID: 27320958 DOI: 10.1016/j.neubiorev.2016.06.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 05/17/2016] [Accepted: 06/16/2016] [Indexed: 12/19/2022]
Abstract
Social interaction can have a profound effect on individual behavior, perhaps most salient in interactions between sick suffering children and their parents. Chronic pain is a difficult condition that can produce considerable changes in children's behaviors that can secondarily have profound effects on their parents. It may create a functionally disabling negative feedback loop. Research supports the notion of alterations in the brain of individuals who observe and empathize with loved ones in acute pain. However, neural activity in relation to empathic responses in the context of chronic pain has not been examined. Ongoing suffering with chronic pain in a child can result in child's brain circuit alterations. Moreover, prolonged suffering jointly experienced by the parent may putatively produce maladaptive changes in their neural networks and consequently in parental behaviors. Here we put forth the conceptual framework for 'Chronic pain contagion' (CPC). We review the underlying processes in CPC and discuss implications for devising and implementing treatments for children in chronic pain and their parents.
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Affiliation(s)
- Laura E Simons
- Center for Pain and the Brain, Boston Childrens Hospital (BCH), Boston, USA; Department of Anesthesiology, Perioperative, and Pain Medicine, Harvard Medical School, Boston, USA; Department of Psychiatry, Harvard Medical School, Boston, USA.
| | - Liesbet Goubert
- Department of Experimental-Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Tine Vervoort
- Department of Experimental-Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - David Borsook
- Center for Pain and the Brain, Boston Childrens Hospital (BCH), Boston, USA; Department of Anesthesiology, Perioperative, and Pain Medicine, Harvard Medical School, Boston, USA; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, USA
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18
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Weissmann R, Uziel Y. Pediatric complex regional pain syndrome: a review. Pediatr Rheumatol Online J 2016; 14:29. [PMID: 27130211 PMCID: PMC4850724 DOI: 10.1186/s12969-016-0090-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/25/2016] [Indexed: 11/15/2022] Open
Abstract
Complex regional pain syndrome (CRPS) is a chronic, intensified localized pain condition that can affect children and adolescents as well as adults, but is more common among adolescent girls. Symptoms include limb pain; allodynia; hyperalgesia; swelling and/or changes in skin color of the affected limb; dry, mottled skin; hyperhidrosis and trophic changes of the nails and hair. The exact mechanism of CRPS is unknown, although several different mechanisms have been suggested. The diagnosis is clinical, with the aid of the adult criteria for CRPS. Standard care consists of a multidisciplinary approach with the implementation of intensive physical therapy in conjunction with psychological counseling. Pharmacological treatments may aid in reducing pain in order to allow the patient to participate fully in intensive physiotherapy. The prognosis in pediatric CRPS is favorable.
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Affiliation(s)
- Rotem Weissmann
- Pediatric Rheumatology Unit, Department of Pediatrics, Meir Medical Center, 49 Tshernichovsky St., Kfar Saba, 44281 Israel ,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yosef Uziel
- Pediatric Rheumatology Unit, Department of Pediatrics, Meir Medical Center, 49 Tshernichovsky St., Kfar Saba, 44281, Israel. .,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.
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19
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Abstract
Despite the severe pain and disability associated with complex regional pain syndrome (CRPS), the lack of understanding of the pathophysiological mechanisms supporting this enigmatic condition prevents the rational design of new therapies, a situation that is frustrating to both the physician and the patient. The review highlights some of the mechanisms thought to be involved in the pathophysiology of CRPS in preclinical models and CRPS patients, with the ultimate goal that understanding these mechanisms will lead to the design of efficacious, mechanism-based treatments available to the clinic.
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Affiliation(s)
- Maral Tajerian
- Veterans Affairs Palo Alto Health Care System Palo Alto, CA, USA,Department of Anesthesiology, Stanford University School of Medicine, Stanford, CA, USA
| | - J David Clark
- Veterans Affairs Palo Alto Health Care System Palo Alto, CA, USA,Department of Anesthesiology, Stanford University School of Medicine, Stanford, CA, USA,Corresponding author: J David Clark, MD, PhD., Anesthesia Service, Veterans Affairs Palo Alto Health Care, System, 3801 Miranda Ave., Palo Alto, CA 94304, USA, Tel: 650-493-5000 ext. 60479, Fax: 650-852-3423,
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20
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Kuttikat A, Noreika V, Shenker N, Chennu S, Bekinschtein T, Brown CA. Neurocognitive and Neuroplastic Mechanisms of Novel Clinical Signs in CRPS. Front Hum Neurosci 2016; 10:16. [PMID: 26858626 PMCID: PMC4728301 DOI: 10.3389/fnhum.2016.00016] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 01/12/2016] [Indexed: 12/16/2022] Open
Abstract
Complex regional pain syndrome (CRPS) is a chronic, debilitating pain condition that usually arises after trauma to a limb, but its precise etiology remains elusive. Novel clinical signs based on body perceptual disturbances have been reported, but their pathophysiological mechanisms remain poorly understood. Investigators have used functional neuroimaging techniques (including MEG, EEG, fMRI, and PET) to study changes mainly within the somatosensory and motor cortices. Here, we provide a focused review of the neuroimaging research findings that have generated insights into the potential neurocognitive and neuroplastic mechanisms underlying perceptual disturbances in CRPS. Neuroimaging findings, particularly with regard to somatosensory processing, have been promising but limited by a number of technique-specific factors (such as the complexity of neuroimaging investigations, poor spatial resolution of EEG/MEG, and use of modeling procedures that do not draw causal inferences) and more general factors including small samples sizes and poorly characterized patients. These factors have led to an underappreciation of the potential heterogeneity of pathophysiology that may underlie variable clinical presentation in CRPS. Also, until now, neurological deficits have been predominantly investigated separately from perceptual and cognitive disturbances. Here, we highlight the need to identify neurocognitive phenotypes of patients with CRPS that are underpinned by causal explanations for perceptual disturbances. We suggest that a combination of larger cohorts, patient phenotyping, the use of both high temporal, and spatial resolution neuroimaging methods, and the identification of simplified biomarkers is likely to be the most fruitful approach to identifying neurocognitive phenotypes in CRPS. Based on our review, we explain how such phenotypes could be characterized in terms of hierarchical models of perception and corresponding disturbances in recurrent processing involving the somatosensory, salience and executive brain networks. We also draw attention to complementary neurological factors that may explain some CRPS symptoms, including the possibility of central neuroinflammation and neuronal atrophy, and how these phenomena may overlap but be partially separable from neurocognitive deficits.
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Affiliation(s)
- Anoop Kuttikat
- Department of Rheumatology, Addenbrooke's Hospital , Cambridge , UK
| | - Valdas Noreika
- Cognition and Brain Sciences Unit, Medical Research Council , Cambridge , UK
| | - Nicholas Shenker
- Department of Rheumatology, Addenbrooke's Hospital , Cambridge , UK
| | - Srivas Chennu
- Cognition and Brain Sciences Unit, Medical Research Council, Cambridge, UK; Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Tristan Bekinschtein
- Cognition and Brain Sciences Unit, Medical Research Council, Cambridge, UK; Department of Psychology, University of Cambridge, Cambridge, UK
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21
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Ibinson JW, Vogt KM, Taylor KB, Dua SB, Becker CJ, Loggia M, Wasan AD. Optimizing and Interpreting Insular Functional Connectivity Maps Obtained During Acute Experimental Pain: The Effects of Global Signal and Task Paradigm Regression. Brain Connect 2015; 5:649-57. [PMID: 26061382 DOI: 10.1089/brain.2015.0354] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The insula is uniquely located between the temporal and parietal cortices, making it anatomically well-positioned to act as an integrating center between the sensory and affective domains for the processing of painful stimulation. This can be studied through resting-state functional connectivity (fcMRI) imaging; however, the lack of a clear methodology for the analysis of fcMRI complicates the interpretation of these data during acute pain. Detected connectivity changes may reflect actual alterations in low-frequency synchronous neuronal activity related to pain, may be due to changes in global cerebral blood flow or the superimposed task-induced neuronal activity. The primary goal of this study was to investigate the effects of global signal regression (GSR) and task paradigm regression (TPR) on the changes in functional connectivity of the left (contralateral) insula in healthy subjects at rest and during acute painful electric nerve stimulation of the right hand. The use of GSR reduced the size and statistical significance of connectivity clusters and created negative correlation coefficients for some connectivity clusters. TPR with cyclic stimulation gave task versus rest connectivity differences similar to those with a constant task, suggesting that analysis which includes TPR is more accurately reflective of low-frequency neuronal activity. Both GSR and TPR have been inconsistently applied to fcMRI analysis. Based on these results, investigators need to consider the impact GSR and TPR have on connectivity during task performance when attempting to synthesize the literature.
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Affiliation(s)
- James W Ibinson
- 1 Department of Anesthesiology, Center for Pain Research, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Keith M Vogt
- 2 Department of Anesthesiology, University of Pittsburgh Medical Center , Pittsburgh, Pennsylvania
| | - Kevin B Taylor
- 3 University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Shiv B Dua
- 4 George Washington University School of Medicine and Health Sciences , Washington, District of Columbia
| | | | - Marco Loggia
- 5 Department of Radiology, Massachusetts General Hospital, Brigham and Women's Hospital , and Harvard Medical School, Boston, Massachusetts
| | - Ajay D Wasan
- 1 Department of Anesthesiology, Center for Pain Research, University of Pittsburgh , Pittsburgh, Pennsylvania
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22
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Abstract
PURPOSE OF REVIEW Complex regional pain syndrome (CRPS) is a chronic pain condition typically involving a limb, which is characterized by neuropathic pain, sensory abnormalities and neurovascular findings. The exact cause of CRPS is unknown; however, proposed theories include alterations in the sympathetic and central nervous system (CNS), small fibre changes in the peripheral nervous system and psychological factors. Although this condition was previously considered rare among children and adolescents, it has been increasingly recognized in paediatric patients and can result in significant disability. RECENT FINDINGS The diagnosis of paediatric CRPS is based upon clinical criteria obtained from a thorough history and physical examination. Other possible causes, such as orthopaedic, infectious, vascular and rheumatologic disorders, should be ruled out prior to making the diagnosis. Treatment focuses on a rehabilitative strategy consisting of physical therapy, occupational therapy and cognitive-behavioural therapy with an overall focus on return to functioning. SUMMARY CRPS in children and adolescents is characterized by a painful, mottled appearing, swollen limb with allodynia and hyperalgesia. For most patients, pain is severe, resulting in significant functional disability. More recent evidence suggests that a rehabilitative programme results in improvement in both pain and functional measures.
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23
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Abstract
BACKGROUND There is little knowledge regarding the association between psychological factors and complex regional pain syndrome (CRPS) in children. Specifically, it is not known which factors precipitate CRPS and which result from the ongoing painful disease. OBJECTIVES To examine symptoms of depression and anxiety as well as the experience of stressful life events in children with CRPS compared with children with chronic primary headaches and functional abdominal pain. METHODS A retrospective chart study examined children with CRPS (n=37) who received intensive inpatient pain treatment between 2004 and 2010. They were compared with two control groups (chronic primary headaches and functional abdominal pain; each n=37), who also received intensive inpatient pain treatment. Control groups were matched with the CRPS group with regard to admission date, age and sex. Groups were compared on symptoms of depression and anxiety as well as stressful life events. RESULTS Children with CRPS reported lower anxiety and depression scores compared with children with abdominal pain. A higher number of stressful life events before and after the onset of the pain condition was observed for children with CRPS. CONCLUSIONS Children with CRPS are not particularly prone to symptoms of anxiety or depression. Importantly, children with CRPS experienced more stressful life events than children with chronic headaches or abdominal pain. Prospective long-term studies are needed to further explore the potential role of stressful life events in the etiology of CRPS.
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24
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Erpelding N, Simons L, Lebel A, Serrano P, Pielech M, Prabhu S, Becerra L, Borsook D. Rapid treatment-induced brain changes in pediatric CRPS. Brain Struct Funct 2014; 221:1095-111. [PMID: 25515312 DOI: 10.1007/s00429-014-0957-8] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 12/03/2014] [Indexed: 11/25/2022]
Abstract
To date, brain structure and function changes in children with complex regional pain syndrome (CRPS) as a result of disease and treatment remain unknown. Here, we investigated (a) gray matter (GM) differences between patients with CRPS and healthy controls and (b) GM and functional connectivity (FC) changes in patients following intensive interdisciplinary psychophysical pain treatment. Twenty-three patients (13 females, 9 males; average age ± SD = 13.3 ± 2.5 years) and 21 healthy sex- and age-matched controls underwent magnetic resonance imaging. Compared to controls, patients had reduced GM in the primary motor cortex, premotor cortex, supplementary motor area, midcingulate cortex, orbitofrontal cortex, dorsolateral prefrontal cortex (dlPFC), posterior cingulate cortex, precuneus, basal ganglia, thalamus, and hippocampus. Following treatment, patients had increased GM in the dlPFC, thalamus, basal ganglia, amygdala, and hippocampus, and enhanced FC between the dlPFC and the periaqueductal gray, two regions involved in descending pain modulation. Accordingly, our results provide novel evidence for GM abnormalities in sensory, motor, emotional, cognitive, and pain modulatory regions in children with CRPS. Furthermore, this is the first study to demonstrate rapid treatment-induced GM and FC changes in areas implicated in sensation, emotion, cognition, and pain modulation.
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Affiliation(s)
- Nathalie Erpelding
- P.A.I.N. Group, Boston Children's Hospital, Center for Pain and the Brain, 9 Hope Avenue, Waltham, MA, 02453, USA.
- Harvard Medical School, Boston, MA, USA.
| | - Laura Simons
- P.A.I.N. Group, Boston Children's Hospital, Center for Pain and the Brain, 9 Hope Avenue, Waltham, MA, 02453, USA
- Harvard Medical School, Boston, MA, USA
| | - Alyssa Lebel
- P.A.I.N. Group, Boston Children's Hospital, Center for Pain and the Brain, 9 Hope Avenue, Waltham, MA, 02453, USA
- Harvard Medical School, Boston, MA, USA
| | - Paul Serrano
- P.A.I.N. Group, Boston Children's Hospital, Center for Pain and the Brain, 9 Hope Avenue, Waltham, MA, 02453, USA
| | - Melissa Pielech
- P.A.I.N. Group, Boston Children's Hospital, Center for Pain and the Brain, 9 Hope Avenue, Waltham, MA, 02453, USA
| | - Sanjay Prabhu
- Harvard Medical School, Boston, MA, USA
- Department of Radiology, Boston Children's Hospital, Boston, MA, USA
| | - Lino Becerra
- P.A.I.N. Group, Boston Children's Hospital, Center for Pain and the Brain, 9 Hope Avenue, Waltham, MA, 02453, USA
- Harvard Medical School, Boston, MA, USA
- Massachusetts General Hospital, Boston, MA, USA
- McLean Hospital, Belmont, MA, USA
| | - David Borsook
- P.A.I.N. Group, Boston Children's Hospital, Center for Pain and the Brain, 9 Hope Avenue, Waltham, MA, 02453, USA
- Harvard Medical School, Boston, MA, USA
- Massachusetts General Hospital, Boston, MA, USA
- McLean Hospital, Belmont, MA, USA
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25
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Brain neuroplastic changes accompany anxiety and memory deficits in a model of complex regional pain syndrome. Anesthesiology 2014; 121:852-65. [PMID: 25093591 DOI: 10.1097/aln.0000000000000403] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Complex regional pain syndrome (CRPS) is a painful condition with approximately 50,000 annual new cases in the United States. It is a major cause of work-related disability, chronic pain after limb fractures, and persistent pain after extremity surgery. Additionally, CRPS patients often experience cognitive changes, anxiety, and depression. The supraspinal mechanisms linked to these CRPS-related comorbidities remain poorly understood. METHODS The authors used a previously characterized mouse model of tibia fracture/cast immobilization showing the principal stigmata of CRPS (n = 8 to 20 per group) observed in humans. The central hypothesis was that fracture/cast mice manifest changes in measures of thigmotaxis (indicative of anxiety) and working memory reflected in neuroplastic changes in amygdala, perirhinal cortex, and hippocampus. RESULTS The authors demonstrate that nociceptive sensitization in these mice is accompanied by altered thigmotactic behaviors in the zero maze but not open field assay, and working memory dysfunction in novel object recognition and social memory but not in novel location recognition. Furthermore, the authors found evidence of structural changes and synaptic plasticity including changes in dendritic architecture and decreased levels of synaptophysin and brain-derived neurotrophic factor in specific brain regions. CONCLUSIONS The study findings provide novel observations regarding behavioral changes and brain plasticity in a mouse model of CRPS. In addition to elucidating some of the supraspinal correlates of the syndrome, this work supports the potential use of therapeutic interventions that not only directly target sensory input and other peripheral mechanisms, but also attempt to ameliorate the broader pain experience by modifying its associated cognitive and emotional comorbidities.
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26
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Becerra L, Sava S, Simons LE, Drosos AM, Sethna N, Berde C, Lebel AA, Borsook D. Intrinsic brain networks normalize with treatment in pediatric complex regional pain syndrome. Neuroimage Clin 2014; 6:347-69. [PMID: 25379449 PMCID: PMC4218937 DOI: 10.1016/j.nicl.2014.07.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 07/17/2014] [Accepted: 07/29/2014] [Indexed: 12/22/2022]
Abstract
Pediatric complex regional pain syndrome (P-CRPS) offers a unique model of chronic neuropathic pain as it either resolves spontaneously or through therapeutic interventions in most patients. Here we evaluated brain changes in well-characterized children and adolescents with P-CRPS by measuring resting state networks before and following a brief (median = 3 weeks) but intensive physical and psychological treatment program, and compared them to matched healthy controls. Differences in intrinsic brain networks were observed in P-CRPS compared to controls before treatment (disease state) with the most prominent differences in the fronto-parietal, salience, default mode, central executive, and sensorimotor networks. Following treatment, behavioral measures demonstrated a reduction of symptoms and improvement of physical state (pain levels and motor functioning). Correlation of network connectivities with spontaneous pain measures pre- and post-treatment indicated concomitant reductions in connectivity in salience, central executive, default mode and sensorimotor networks (treatment effects). These results suggest a rapid alteration in global brain networks with treatment and provide a venue to assess brain changes in CRPS pre- and post-treatment, and to evaluate therapeutic effects.
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Affiliation(s)
- Lino Becerra
- Pain/Analgesia Imaging Neuroscience (P.A.I.N.) Group, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA ; Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA ; Department of Radiology, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA
| | - Simona Sava
- Pain/Analgesia Imaging Neuroscience (P.A.I.N.) Group, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA
| | - Laura E Simons
- Pain/Analgesia Imaging Neuroscience (P.A.I.N.) Group, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA ; Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA
| | - Athena M Drosos
- Pain/Analgesia Imaging Neuroscience (P.A.I.N.) Group, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA
| | - Navil Sethna
- Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA
| | - Charles Berde
- Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA
| | - Alyssa A Lebel
- Pain/Analgesia Imaging Neuroscience (P.A.I.N.) Group, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA ; Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA
| | - David Borsook
- Pain/Analgesia Imaging Neuroscience (P.A.I.N.) Group, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA ; Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, MA 02115, USA
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27
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Abstract
Pain is a common presenting and often persistent symptom for children with rheumatological disease. Pain is not clearly related to disease severity in children with inflammatory juvenile idiopathic arthritis, and presentations of non-inflammatory musculoskeletal pain are common but there is limited evidence to guide management. Pain assessment must extend beyond measures of pain severity to more fully evaluate characteristics of pain, functional impact and psychosocial effects and family interactions. Evaluation of mechanisms of joint pain in adults has identified potential treatment targets, but additional studies are required as the acute and long-term impacts of pain and injury change during postnatal development. Genotyping, sensory evaluation and neuroimaging may better characterize chronic musculoskeletal pain, identify high-risk groups and/or provide additional outcome measures to monitor disease and treatment progress. An integrated approach to management is required to effectively select and target interventions, reduce pain and disability and improve long-term outcome.
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28
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The responsive amygdala: treatment-induced alterations in functional connectivity in pediatric complex regional pain syndrome. Pain 2014; 155:1727-1742. [PMID: 24861582 DOI: 10.1016/j.pain.2014.05.023] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 04/27/2014] [Accepted: 05/19/2014] [Indexed: 01/11/2023]
Abstract
The amygdala is a key brain region with efferent and afferent neural connections that involve complex behaviors such as pain, reward, fear, and anxiety. This study evaluated resting state functional connectivity of the amygdala with cortical and subcortical regions in a group of chronic pain patients (pediatric complex regional pain syndrome) with age-sex matched control subjects before and after intensive physical-biobehavioral pain treatment. Our main findings include (1) enhanced functional connectivity from the amygdala to multiple cortical, subcortical, and cerebellar regions in patients compared with control subjects, with differences predominantly in the left amygdala in the pretreated condition (disease state); (2) dampened hyperconnectivity from the left amygdala to the motor cortex, parietal lobe, and cingulate cortex after intensive pain rehabilitation treatment within patients with nominal differences observed among healthy control subjects from time 1 to time 2 (treatment effects); (3) functional connectivity to several regions key to fear circuitry (prefrontal cortex, bilateral middle temporal lobe, bilateral cingulate, hippocampus) correlated with higher pain-related fear scores; and (4) decreases in pain-related fear associated with decreased connectivity between the amygdala and the motor and somatosensory cortex, cingulate, and frontal areas. Our data suggest that there are rapid changes in amygdala connectivity after an aggressive treatment program in children with chronic pain and intrinsic amygdala functional connectivity activity serving as a potential indicator of treatment response.
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29
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Wang YC, Li HY, Lin FS, Cheng YJ, Huang CH, Chou WH, Huang HH, Lin CC, Lin CC, Sung FC, Wei JN. Injury Location and Mechanism for Complex Regional Pain Syndrome: A Nationwide Population-Based Case-Control Study in Taiwan. Pain Pract 2014; 15:548-53. [PMID: 24801059 DOI: 10.1111/papr.12211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 01/03/2014] [Accepted: 03/01/2014] [Indexed: 12/30/2022]
Abstract
BACKGROUND Few studies have investigated the relationship between injury location, mechanism and their association with complex regional pain syndrome (CRPS). We conducted a nationwide database survey to explore this issue. METHODS This was a population-based case-control study. Five hundred and eighty-nine patients with at least one ambulatory visit or admission with a principal diagnosis of CRPS from 2004 to 2009 were selected. For each CRPS patient, ten age- and sex-matched non-CRPS subjects were randomly selected. The odds ratios (PLoS One. 2013;8:e57205) and 95% confidence intervals (95% CIs) of risk factors for CRPS were derived from multivariate logistic regression models. RESULTS Injury was a risk factor for CRPS (OR, 2.96; 95% CI, 2.18 to 4.02) independent of age and sex. In adjusted models, open wound on the upper limbs (OR 1.25, 95% CI 1.02 to 1.54) conferred higher CRPS risk. Injury mechanisms including nerve and spinal cord injury (OR 2.42, 95% CI 1.44 to 4.08), muscle and joint sprain and strain (OR 1.69, 95% CI 1.40 to 2.03), superficial injury (OR 1.23, 95% CI 1.00 to 1.51), and contusion (OR 1.44, 95% CI 1.20 to 1.74), but not fracture, increased the risk of CRPS. CONCLUSION Injury in the extremities rather than the trunk is an important risk factor for CRPS. Certain injury mechanisms confer higher risk of CRPS. This nationwide study demonstrated that injury increased CRPS nearly threefold. Open wound, sprain and strain, superficial injury, contusion, and nerve and spinal cord injury are main injury mechanisms. Injury in the extremities confers a higher risk of CRPS.
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Affiliation(s)
- Yi-Chia Wang
- Department of Anesthesiology, National Taiwan University Hospital, Taipei, Taiwan
| | - Hung-Yuan Li
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Feng-Sheng Lin
- Department of Anesthesiology, National Taiwan University Hospital, Taipei, Taiwan
| | - Ya-Jung Cheng
- Department of Anesthesiology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chi-Hsiang Huang
- Department of Anesthesiology, National Taiwan University Hospital, Taipei, Taiwan
| | - Wei-Han Chou
- Department of Anesthesiology, National Taiwan University Hospital, Taipei, Taiwan
| | - Hsing-Hao Huang
- Department of Anesthesiology, National Taiwan University Hospital, Taipei, Taiwan
| | - Cheng-Chieh Lin
- Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan.,School of Medicine, China Medical University, Taichung, Taiwan.,Department of Health Care Administration, Asian University, Taichung, Taiwan
| | - Che-Chen Lin
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan
| | - Fung-Chang Sung
- Institute of Environmental Health, China Medical University College of Public Health, Taichung, Taiwan
| | - Jung-Nan Wei
- Chia Nan University of Pharmacy and Science, Tainan, Taiwan
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Borchers A, Gershwin M. Complex regional pain syndrome: A comprehensive and critical review. Autoimmun Rev 2014; 13:242-65. [DOI: 10.1016/j.autrev.2013.10.006] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2013] [Indexed: 12/19/2022]
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de Lalouvière LLH, Ioannou Y, Fitzgerald M. Neural mechanisms underlying the pain of juvenile idiopathic arthritis. Nat Rev Rheumatol 2014; 10:205-11. [DOI: 10.1038/nrrheum.2014.4] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Gallagher JJ, Tajerian M, Guo T, Shi X, Li W, Zheng M, Peltz G, Kingery WS, Clark JD. Acute and chronic phases of complex regional pain syndrome in mice are accompanied by distinct transcriptional changes in the spinal cord. Mol Pain 2013; 9:40. [PMID: 23924076 PMCID: PMC3751593 DOI: 10.1186/1744-8069-9-40] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 08/06/2013] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND CRPS is a painful, debilitating, and often-chronic condition characterized by various sensory, motor, and vascular disturbances. Despite many years of study, current treatments are limited by our understanding of the underlying mechanisms. Little is known on the molecular level concerning changes in gene expression supporting the nociceptive sensitization commonly observed in CRPS limbs, or how those changes might evolve over time. RESULTS We used a well-characterized mouse tibial fracture/cast immobilization model of CRPS to study molecular, vascular and nociceptive changes. We observed that the acute (3 weeks after fracture) and chronic (7 weeks after fracture) phases of CRPS-like changes in our model were accompanied by unique alterations in spinal gene expression corresponding to distinct canonical pathways. For the acute phase, top regulated pathways were: chemokine signaling, glycogen degradation, and cAMP-mediated signaling; while for the chronic phase, the associated pathways were: coagulation system, granzyme A signaling, and aryl hydrocarbon receptor signaling. We then focused on the role of CcL2, a chemokine that we showed to be upregulated at the mRNA and protein levels in spinal cord tissue in our model. We confirmed its association with the nociceptive sensitization displayed in this model by demonstrating that the spinal but not peripheral administration of a CCR2 antagonist (RS504393) in CRPS animals could decrease mechanical allodynia. The spinal administration of CcL2 itself resulted in mechanical allodynia in control mice. CONCLUSIONS Our data provide a global look at the transcriptional changes in the spinal cord that accompany the acute and chronic phases of CRPS as modeled in mice. Furthermore, it follows up on one of the top-regulated genes coding for CcL2 and validates its role in regulating nociception in the fracture/cast model of CRPS.
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