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BACKGROUND: Low back pain (LBP) is a prevalent condition frequently leading to disability. Research suggests that self-management (SM) programs for chronic LBP should include strategies to promote sustainable return to work. OBJECTIVES: This study aimed to 1) validate and prioritize the essential content elements of a SM program in light of the needs of workplace representatives, and 2) identify the main facilitators and barriers to be considered when developing and implementing a SM program delivered via information and communication technologies (ICT). METHODS: A sequential qualitative design was used. We recruited workplace representatives and potential future users of SM programs (union representatives and employers) and collected data through focus groups and nominal group techniques to validate the relevance of the different elements included into 3 broad categories (Understand, Learn, Apply), as well as to highlight potential barriers and facilitators. RESULTS: Eleven participants took part in this study. The content elements proposed in the literature for SM programs were found to align with potential future users’ needs, with participants ranking the same elements as those proposed in the scientific literature as the most important across all categories. Although some barriers were identified, workplace representatives believed that ICT offer an appropriate strategy for delivering individualized SM programs to injured workers who have returned to work. CONCLUSION: Our study suggests that the elements identified in the literature as essential components of SM programs designed to ensure a sustainable return to work for people with LBP are in line with the needs of future users.

Background and aimsIsolating the effect of an intervention from the natural course and fluctuations of a condition is a challenge in any clinical trial, particularly in the field of pain. Regression to the mean (RTM), wherein extreme scores are more likely to be followed by more average scores, may explain some of those observed fluctuations. However, while this phenomenon is relatively well-known, its effect on outcome measures is rarely quantified, and often only evoked as a potential confound. In this paper, we describe and quantify such symptom fluctuations in a chronic pain population in the absence of treatment, and compare the relative stability of various self-reported outcome measures in untreated chronic low back pain (CLBP) patients and healthy controls (HC).MethodsTwenty-three untreated CLBP patients and 25 HC took part in this observational study, wherein they were asked to complete an array of commonly used questionnaires in pain studies (including the Pain Catastrophizing Scale [PCS], State and Trait Anxiety Inventory [STAI], Central Sensitization Inventory [CSI], Pain Disability Index [PDI], Brief Pain Inventory [BPI] etc.) during each of three visits (V1, V2, V3) at 2-month intervals. Scores at V1 were classified into three subgroups (extremely high, normal and extremely low), based on z-scores. The average delta (Δ=V2-V1) was calculated for each subgroup, for each questionnaire, to describe the evolution of scores over time. This analysis was repeated with the data for V2 and V3.ResultsHigh initial scores were likely to be followed by more average scores; for instance, the “extremely high” subgroup for the PCS (a reputably ‘stable’ questionnaire) had an average decrease of 12/52 from V1 to V2. Participants with “average” initial scores tended to show a small decrease over time, and participants with “extremely low” initial scores tended to remain stable. However, while the pattern of fluctuation in the three subgroups was similar across questionnaires, the magnitude of these fluctuations varied greatly. The STAI and CSI were the most stable questionnaires of all, with even the “extremely high” subgroup showing little or no improvement over time. The least stable questionnaires were the PCS, PDI and BPI.Discussion and conclusionThese pain trajectories in untreated patients cannot be attributable to RTM alone because of their asymmetry, nor to the placebo effect as they occurred in the absence of any intervention. We propose that the observed improvements could be the result of an Effect of Care, wherein participants had meaningful improvements simply from taking part in a study and talking about their pain to benevolent research staff, despite the absence of active or sham treatment. These findings have important clinical ramifications. Beyond simply raising a flag as to the existence (and significance) of Effect of Care, we provide a questionnaire-specific baseline of expected fluctuations based on initial score, against which researchers can compare results from clinical trials when trying to isolate the effect of their intervention.

Low back pain (LBP) often modifies spine motor control, but the neural origin of these motor control changes remains largely unexplored. This study aimed to determine the impact of experimental low back pain on the excitability of cortical, subcortical, and spinal networks involved in the control of back muscles. Thirty healthy subjects were recruited and allocated to pain (capsaicin and heat) or control (heat) groups. Corticospinal excitability (motor-evoked potential; MEP) and intracortical networks were assessed by single- and paired-pulse transcranial magnetic stimulation, respectively. Electrical vestibular stimulation was applied to assess vestibulospinal excitability (vestibular MEP; VMEP) and the stretch reflex for excitability of the spinal or supraspinal loop (R1 and R2, respectively). Evoked back motor responses were measured before, during, and after pain induction. Nonparametric rank-based ANOVA determined if pain modulated motor neural networks. A decrease of R1 amplitude was present after the pain disappearance (

Chronic pain is a widespread health condition affecting millions of individuals worldwide. Despite its high prevalence, the underlying neural mechanisms and pathophysiology of chronic pain are still not well understood. Introduced about 35 years ago, brain diffusion MRI has emerged as a powerful tool to investigate white matter microstructure and connectivity changes in chronic pain conditions. In this review, we provide an overview of the current state of research on brain diffusion MRI in chronic pain, including the methods used to acquire and analyze diffusion MRI data, as well as the major findings in the field.We discuss the evidence supporting the role of altered white matter microstructure and connectivity in chronic pain conditions, highlighting the importance of studying multiple chronic pain syndromes to identify common neurobiological pathways. We also explore the potential clinical applications of diffusion MRI in chronic pain research, such as identifying biomarkers for diagnosis and treatment response.In addition, we explore the shortcomings and difficulties associated with brain diffusion MRI in chronic pain studies, such as the necessity for uniformity in data acquisition and analysis methods. Finally, we discuss emerging techniques and future directions in brain diffusion MRI research that may provide new insights into the pathophysiology of chronic pain and potential new therapeutic targets. In summary, we are optimistic that brain diffusion MRI has significant potential in furthering our knowledge of chronic pain and enhancing clinical outcomes, although further research is required due to the limited body of literature currently available, and that targeted therapeutic strategies are yet to be identified.

Background. Algo is an integrated knowledge translation (IKT)-based algorithm for supporting occupational therapists (OTs) with skill mix for selecting bathing equipment. While IKT approaches are increasingly valued in implementation science, their benefits with respect to the utilization of knowledge in clinical settings are scarcely documented. Purpose. To identify Algo's level of utilization and the characteristics associated with its level of utilization. Method. A cross-sectional correlational study was conducted with OTs working in homecare services (HCS) through an online survey based on Knott and Wildavsky's classification and the Promoting Action on Research Implementation in Health Services ( PARIHS) framework. Findings. Almost half (48%) of the OTs surveyed (n = 125; participation rate: 16%) reached one of the seven levels of utilization. While Evidence characteristics are perceived as facilitators to its utilization, Context statements indicate an unfavorable organizational climate to the implementation of change. Implications. Strategies should target additional stakeholders (e.g., HCS managers) and organizational adjustments in HCS to sustain Algo's utilization.

Purpose Quantitative sensory testing (QST) is a standardized method to assess somatosensory function. The collection of qualitative information, during the QST procedure, could be an interesting way to facilitate the characterization of altered sensory perception and the identification of different pain phenotypes. The aims of this study were 1) to classify qualitative fieldnotes of sensory abnormalities collected during an independent QST study, and 2) to generate a qualitative interview guide that could be included in the traditional QST procedure as a step towards the implementation of a mixed methods approach. Patients and Methods QST data were collected from 48 chronic neuropathic pain patients treated with spinal cord stimulation (SCS). Three body areas, with or without SCS, were tested: the painful limb targeted by SCS, the contralateral area, and the ipsilateral upper limb. After each trial of each QST modality, patients were encouraged to report any sensory abnormalities they could identify with a pain quality scale or using their own words. Results Qualitative self-reported sensory abnormalities were dichotomized into two groups: altered sensory intensities and altered sensory perceptions. Altered sensory intensities were classified as sensory loss or sensory gain subgroups. Altered sensory perceptions were classified as paresthesia and dysesthesia subgroups Overall, 630 qualitative fieldnotes of altered sensations were collected: 385 on the painful limb, 173 at the contralateral area, and 72 at the ipsilateral upper limb. Based on these qualitative data, we propose a standardized method to collect qualitative data involving 9 open- and close-ended questions and 21 codes. Conclusion Our findings have highlighted the value of qualitative sensory evaluation during QST and constitute an important milestone in the development of a mixed methods protocol in phenotyping research., Video abstract Point your SmartPhone at the code above. If you have a QR code reader the video abstract will appear. Or use: https://youtu.be/LoRb5V0s7Hk

Context: Chronic low-back pain (CLBP) may be associated with changes in postural balance in athletes as poor postural control during sports practice. Objective: To compare the postural control of athletes with and without CLBP during 2 one-legged stance tasks and identify the center of pressure (COP) cutoff values to determine the main differences. Designed: A cross-sectional study. Setting: Laboratory of functional evaluation and human motor performance. Participants: A total of 56 male athletes, 28 with and 28 without CLBP (mean age = 26 y). Intervention: The one-legged stance with knee extension and with the knee at 30° flexion tasks were measured and analyzed on a force platform. The participants completed three 30-second trials (30 s of rest between each trial). Main Outcome Measures: The COP parameters: the area of COP, mean COP sway velocity in both the anteroposterior and mediolateral directions, and total COP displacement were computed, and a receiver operating characteristics curve analysis was applied to determine the group differences. Results: Athletes with CLBP had poorer postural control (P d = 0.80).The knee extension cutoffs identified were >7.1 cm2 for the COP area, >2.6 cm/s for the COP sway velocity in the anterior-posterior direction, and >3.2 cm/s for the mediolateral direction. Whereas, the 30° knee flexion cutoffs were >10.9 cm2 for the COP area, >2.9 cm/s for the COP sway velocity in the anterior-posterior direction, and >4.1 cm/s for the mediolateral direction. Both measures showed enough sensitivity and specificity (ie, area under the curve = 0.88 in and 0.80, respectively) to discriminate both groups. Conclusions: The athletes with CLBP had poorer postural control than the healthy athletes and obtained specific cutoff scores from the COP values.

Background: Temporal summation and conditioned pain modulation (CPM) can be measured using a thermode and cold pressor test (CPTest). Unfortunately, these complex and expensive tools are ill-suited for routine clinical assessments. Aims: We aimed to compare the temporal summation and CPM obtained with the thermode + CPTest paradigm to those obtained with a novel paradigm using transcutaneous electrical nerve stimulation (TENS). Methods: We assessed temporal summation and CPM in 29 healthy participants, using two paradigms (random order): TENS, and thermode + CPTest. In the TENS paradigm, both the conditioning stimulus (CS) and the test stimulus (TS) were delivered using TENS; in the thermode + CPTest paradigm, the CS consisted of a CPTest and the TS was delivered using a thermode. We compared the average temporal summation and CPM evoked by the two paradigms. Results: Average temporal summation was similar for both modalities (P = 0.90), and the number of participants showing temporal summation was similar in both paradigms (19 with thermode vs. 18 with TENS; P = 1.00). Average CPM response was larger following the thermode + CPTest than following the TENS (P = 0.005), and more participants showed CPM with the thermode + CPTest paradigm compared to the TENS paradigm (24 vs. 14; P = 0.01). Conclusions: Both paradigms were roughly equivalent in the ability to evoke temporal summation (although response to one modality did not predict response to the other), but the TENS paradigm appeared to be less apt to induce a CPM response than the thermode + CPTest paradigm.

This study aims to paint a picture of the factors that influence the process of rehabilitation, return, and stay at work, for aging workers who have suffered an occupational injury.Based on a descriptive interpretative research design, the authors conducted interviews with 23 participants (i.e., aging workers, workers' representatives, employers, insurers, and rehabilitation professionals) to gather their perspectives. Qualitative data was analyzed through thematic analysis.Fifteen factors related to the worker, health system, workplace, or compensation system were identified. These factors prevail during rehabilitation, return to work, stay at work, or the entire process.This study contributes to the advancement of knowledge regarding three main ideas: (1) the importance of not placing the responsibility on the worker in this complex process, (2) the key role of the compensation system, and (3) the necessity of transforming work to reduce ageism.

Background and purpose Aging is associated with an impairment of diverse physiological functions, including nociception. For example, older adults in comparison to young adults, show an overall increase in pain thresholds, reflecting a decline in pain sensitivity and changes in the nociceptive pathways. These results are, however, debated as they were not always replicated depending on the stimulus modality, duration, and location. The aim of the current study was to determine how the temporal evolution of pain intensity during a continuous tonic heat pain test is influenced by aging. More specifically, we wanted to 1) assess the effect of age on initial peak and late-phase pain and 2) determine whether potential age effects depend on the stimulation site. Participants and methods 13 young adults (average of 27.9 years old) and 13 older adults (average of 67.5 years old) participated in this study. Experimental heat pain was evoked on an appendicular (forearm) and axial (lower-back) body region, using a thermode (2-minute stimulation at a constant, individually-adjusted temperature). During the nociceptive stimulation, participants used a computerized visual analogue scale to continuously rate their pain. Results We show that initial peak (0-30 seconds) pain sensation was significantly lower in older adults compared to young adults, while late-phase (30-120 seconds) pain sensation was similar across the two age groups. These results hold true for both stimulation sites, suggesting the existence of an age effect on both appendicular and axial body regions. Conclusion The lower magnitude of initial peak pain observed in older adults, which affects both appendicular and axial body regions, could reflect generalized peripheral or central alterations of the nociceptive system in older adults. These alterations in older adults could have significant clinical impacts, such as an increased vulnerability to injury or an underestimation of the severity of their pain condition.

Background: Various pharmacological treatments have been used to relieve pain and reduce the duration and occurrence of cluster headache (CH) attacks, but these treatments remain partially effective for many patients. Aerobic exercises have been proposed to decrease the prevalence and severity of symptoms associated with other types of headaches, but the effectiveness of aerobic exercise for CH management has not yet been investigated. Case presentation: This report describes the case of a 24 yearold male patient diagnosed with episodic CH (1/day; > 1 h). Thirteen days after the first episode, moderate-intensity continuous aerobic exercise was performed (10–30 min) at the onset of CH attack. Aerobic exercise reduced both severity and duration of CH attacks. Conclusions: This case report suggests that performing moderate-intensity aerobic exercise at the onset of a CH attack may be an interesting non-pharmacologic intervention that can be used to ease pain symptoms.

R Pelletier,1 L Purcell-Levesque,2 M-C Girard,2 P-M Roy,2 G Leonard2,3 1School of Rehabilitation, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada; 2Research Center on Aging, Centre intégré universitaire de santé et de services sociaux de l’Estrie - Centre hospitalier universitaire de Sherbrooke (CIUSSS de l’Estrie - CHUS), Sherbrooke, Quebec, Canada; 3School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, CanadaCorrespondence: G Leonard Email guillaume.leonard2@usherbrooke.caPurpose: Older adults are referred for outpatient physical therapy to improve their functional capacities. The goal of the present study was to determine if pain had an influence on functional outcomes in older adults who took part in an outpatient physical rehabilitation program.Patients and Methods: A retrospective study was performed on the medical records of patients aged 65 and over referred for outpatient physical therapy to improve physical functioning (n=178). Pain intensity (11-point numeric pain scale) and results from functional outcome measures (Timed Up and Go [TUG], Berg Balance Scale [BBS], 10-meter walk test, 6-minute walk test and Functional Autonomy Measuring System [SMAF]) were extracted at initial (T1) and final (T2) consultations. Paired t-tests were performed to determine if there were differences in functional outcome measures between T1 and T2 in all the patients. Patients were stratified to those with pain (PAIN, n=136) and those without pain (NO PAIN, n=42). Differences in functional outcome measures between T1 and T2 (delta scores) were compared between groups with independent t-tests with Welch corrections for unequal variances. Pearson correlation coefficients between initial pain intensity and changes in functional outcome measures (T2-T1) were also performed. Correcting for multiple comparisons, a p-value of p≤ 0.01 was considered as statistically significant.Results: The TUG, BBS, 10-meter walk test, 6-minute walk test all demonstrated improvement between T1 and T2 (all p< 0.01). There was no difference between groups for delta scores for TUG (p=0.14), BBS (p=0.03), 10-meter walk test (p=0.54), 6-minute walk test (p=0.94) and SMAF (p=0.23). Pearson correlation coefficients were weak between initial pain intensity and changes in functional outcome scores between T1 and T2 (r= − 0.16 to 0.15, all p-values > 0.10).Conclusion: These results suggest that pain is not an impediment to functional improvements in older individuals who participated in an outpatient physical rehabilitation program.Keywords: pain, function, physical therapy, older adults, disability

Purpose Complex regional pain syndrome (CRPS) is a rare neuropathic pain condition characterized by sensory, motor and autonomic alterations. Previous investigations have shown that transcranial direct current stimulation (tDCS) and transcutaneous electrical nerve stimulation (TENS) can alleviate pain in various populations, and that a combination of these treatments could provide greater hypoalgesic effects. In the present case report, we describe the effect of tDCS and TENS treatment on pain intensity and unpleasantness in a patient suffering from chronic CRPS. Results The patient was a 37-year-old woman, suffering from left lower limb CRPS (type I) for more than 5 years. Despite medication (pregabalin, tapentadol, duloxetine), rehabilitation treatments (sensorimotor retraining, graded motor imagery) and spinal cord stimulation (SCS), the participant reported moderate to severe pain. Treatments of tDCS alone (performed with SCS turned off during tDCS application, 1 session/day, for 5 consecutive days) did not significantly decrease pain. Combining tDCS with TENS (SCS temporarily turned off during tDCS, 1 session/day, for 5 consecutive days) slightly reduced pain intensity and unpleasantness. Discussion Our results suggest that combining tDCS and TENS could be a therapeutic strategy worth investigating further to relieve pain in chronic CRPS patients. Future studies should examine the efficacy of combined tDCS and TENS treatments in CRPS patients, and other chronic pain conditions, with special attention to the cumulative and long-term effects and its effect on function and quality of life.

Background: Fibromyalgia syndrome (FMS) is a condition characterised by the presence of chronic, widespread musculoskeletal pain, low pain threshold and hyperalgesia. Myofascial trigger points (MTrPs) may worsen symptoms in patients with FMS. Objective: The purpose of this randomised controlled trial was to compare the effects of dry needling and transcutaneous electrical nerve stimulation (TENS) on pain intensity, heart rate variability, galvanic response and oxygen saturation (SpO2). Methods: 74 subjects with FMS were recruited and randomly assigned to either the dry needling group or the TENS group. Outcomes measures (pain intensity, heart rate variability, galvanic skin response, SpO2 and photoplethysmography) were evaluated at baseline and after 6 weeks of treatment. 2×2 mixed-model analyses of variance (ANOVAs) were performed. Results: The mixed-model ANOVAs showed significant differences between groups for the sensory dimension of pain, affective dimension of pain, total dimension of pain, visual analogue scale (VAS) and present pain intensity (PPI) (P=0.001). ANOVAs also showed that significant differences between groups were achieved for very low frequency power of heart rate variability (P=0.008) and low frequency power (P=0.033). There were no significant differences in dry needling versus TENS groups on the spectral analysis of the photoplethysmography and SpO2. Conclusions: This trial showed that application of dry needling therapy and TENS reduced pain attributable to MTrPs in patients with FMS, with greater improvements reported in the dry needling group across all dimensions of pain. Additionally, there were between-intervention differences for several parameters of heart rate variability and galvanic skin responses. Trial registration number: NCT02393352

This article reviews the major features and events that have characterized the 40-year history of the Canadian Pain Society/Société canadienne de la douleur, which is a chapter of the International Association for the Study of Pain (IASP). The review first describes its early formative years in the 1970s as eastern and western chapters of IASP and then its evolution as a Canada-wide chapter and society. Also highlighted is the formulation in this period of its purpose to foster pain research, education, and management and the many activities in which the Society has been engaged to reinforce this purpose over the ensuing decades. These include its annual scientific meetings and the establishment of publications, guidelines, and other educational material as well as awards to support research and trainees. Many of these activities have included engagement with key partners who have also collaborated with the Society in national and international advocacy for pain. The review also outlines some of the features and factors underpinning the Society's national and international reputation and impact resulting from the many contributions that its members have made to the advances in pain research, education, and management over the past 40 years. The review concludes by noting that by way of its rich history and its past and present experiences, the Society is well positioned to continue its many activities and contributions to address the many challenges still facing the pain field in Canada and around the world.Cet article passe en revue les principales caractéristiques et les principaux événements qui ont marqué les 40 ans d’histoire de la Société canadienne de la douleur, un chapitre de l’International Association pour l’étude de la douleur (IASP). On y décrit d’abord ses premières années de formation dans les années 1970 en tant que chapitres de l’Est et de l’Ouest de l’IASP, puis son évolution en tant que chapitre pancanadien et société. La formulation de son objectif, celui de favoriser la recherche sur la douleur, l’éducation à l’égard de celle-ci et sa prise en charge, ainsi que les nombreuses activités dans lesquelles la Société s’est engagée afin de renforcer cet objectif au cours des décennies suivantes, sont aussi mises en relief. Parmi celles-ci, on compte les réunions scientifiques annuelles et l’établissement de publications, de directives et d’autres matériels éducatifs, ainsi que de prix pour soutenir la recherche et les stagiaires. Bon nombre de ces activités comprenaient un engagement avec des partenaires qui ont également collaboré avec la Société dans le cadre de ses efforts de plaidoyer pour la douleur à l’échelle nationale et internationale. L’examen décrit également certaines des caractéristiques et des facteurs qui sous-tendent l’impact et la réputation internationale de la Société qui découlent des nombreuses contributions que ses membres ont apportées aux avancées en matière de recherche, à l’éducation sur la douleur et à la prise en charge de celle-ci au cours des 40 dernières années. La revue conclut en affirmant que par sa riche histoire et ses expériences passées et présentes, la Société est bien placée pour poursuivre ses nombreuses activités et continuer à apporter sa contribution afin de répondre aux nombreux défis auxquels le domaine de la douleur est encore confronté au Canada et dans le monde.

ObjectiveSymptoms present at the end of life and the quality of communication with the healthcare team have both been shown to impact family assessments of the quality of dying of their loved one with dementia. However, the relative contributions of these two factors to family assessments have not yet been investigated. To address this knowledge gap, we explored which of these two factors has more influence on family assessments of the quality of dying of long-term care (LTC) residents with dementia.MethodThis is a secondary analysis of a mortality follow-back study. Ninety-four family members of LTC residents who had died with dementia assessed the quality of dying (very good or not very good), the frequency of symptoms, and the quality of communication with the healthcare team using a self-administered questionnaire mailed 1 month after the resident's death. Logistic regression analyses were performed to determine the relative contributions of the two independent variables of primary interest (frequency of symptoms and quality of communication) to the families’ assessments of the quality of dying.ResultsMultivariate analyses revealed that the quality of communication with the healthcare team was closely linked to the quality of dying (p = 0.009, OR = 1.34, 95% CI = 1.09–1.65), whereas the frequency of symptoms was not (p = 0.142, OR = 1.05, 95% CI = 0.98–1.11) after controlling for potential confounders.Significance of resultsOur findings show that healthcare providers’ ability to engage in the end-of-life conversations with families outweighs the frequency of symptoms in family assessments of the quality of dying of their relative with dementia. Enhancing healthcare providers’ ability to communicate with families about the end-of-life care could improve families’ perceptions of the quality of dying of their relative with dementia and, consequently, ease their grieving process.

Current technologies to measure the maximum forward lean angle, step length and velocity in a clinical setting are neither simple nor cheap. Therefore, the purpose of this study was to determine the accuracy and precision of four live and one post-processing measurement methods compared to the 3D motion analysis gold standard. Twelve healthy younger adults recovered balance, after being released from six randomly ordered forward initial lean angles, using four different live measurement methods: LabVIEW, load cell, inclinometer and protractor. The initial lean angle, step length and velocity were also calculated in post-processing using 2D video analysis and 3D motion analysis. The LabVIEW method was the most accurate and precise, followed by the protractor, inclinometer and load cell methods. The load cell method was the most complex, followed by the LabVIEW, inclinometer and protractor methods. The LabVIEW method was the most expensive, followed by the load cell, inclinometer and protractor methods. Video analysis was sufficiently accurate and precise, equal in complexity and much less expensive than the gold standard. Simpler and lower-cost technologies to measure the initial lean angle, step length and velocity are sufficiently accurate and precise (live: protractor, post-processing: video analysis) to potentially use in a clinical setting.

Several studies suggest that acute pain decreases corticomotor excitability. However, the variability between patients remains important and unexplained. The aim of this study was to unveil potential sources of variation by looking at the effect of kinesiophobia and pain catastrophizing on pain-induced corticomotor modulation.Corticomotor excitability was assessed with the slopes of recruitment curves measured from the first dorsal interosseous elicited by transcranial magnetic stimulation before and during pain induced by capsaicin application on the forearm. Participants completed the Tampa Scale for Kinesiophobia (TSK) and the Pain Catastrophizing Scale (PCS).Twenty-four persons participated in the study. There was a moderate and positive correlation between individual changes in the slope of the recruitment curves and TSK questionnaire scores (rThe results suggest that kinesiophobia may affect neuromotor processes and influence the corticomotor pain response.Higher kinesiophobia scores during experimental induced pain were associated with smaller decreases in the slopes of recruitment curves. These findings suggest that there is less inhibition of corticospinal excitability in participants with greater TKS scores.

IntroductionChronic pain is a significant health problem and is particularly prevalent amongst the elderly. Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that has been proposed to reduce chronic pain. The aim of this study was to evaluate and compare the efficacy of active and sham tDCS in reducing pain in older individuals living with chronic musculoskeletal pain.Materials and MethodsTwenty-four older individuals (mean age: 68 ± 7 years) suffering from chronic musculoskeletal pain were randomized to receive either anodal tDCS over the contralateral motor cortex (2 mA, 20 min; n = 12) or sham tDCS (20 min; n = 12) for five consecutive days. Pain logbooks were used to measure pain intensity. Questionnaires (McGill Pain Questionnaire, Brief Pain Inventory, Beck Depression Inventory [BDI], Beck Anxiety Inventory, Pain Catastrophizing Scale [PCS], and Margolis Pain Drawing and Scoring System [MPDSS]) were also used to assess pain in its globality.ResultsAnalysis of pain logbooks revealed that active tDCS led to a reduction in daily average pain intensity (all p ≤ 0.04), while sham tDCS did not produce any change (p = 0.15). Between-group comparisons for change in pain intensity reduction between active and sham tDCS showed a trend during treatment (p = 0.08) which was significant at the follow-up period (p = 0.02). Active tDCS also improved scores of all questionnaires (all p ≤ 0.02), while sham tDCS only reduced MPDSS scores (p = 0.04). Between-group comparisons for the pain-related outcomes showed significant differences for BDI et PCS after the last tDCS session.ConclusionsThese results suggest that anodal tDCS applied over the primary motor cortex is an effective modality to decrease pain in older individuals. tDCS can also improve other key outcomes, such as physical and emotional functioning, and catastrophic thinking.

Numerous definitions of acute low back pain (aLBP) exist. The use of different definitions results in variability in reported prevalence or incidence, conflicting data regarding factors associated with the transition to chronic LBP (cLBP), and hampers comparability among studies.Here, we compare the impact of 3 aLBP definitions on the number of aLBP cases and participants' characteristics and explore the distribution of participants across definitions.A sample of 1264 participants from the Quebec Low Back Pain Study was included. Three definitions of aLBP were used: (1) not meeting the National Institutes of Health (NIH) cLBP definition ("nonchronic"), (2) pain beginning3 months ago ("acute"), and (3) pain beginning3 months with a preceding LBP-free period ("new episode").There were 847, 842, and 489 aLBP cases meeting the criteria for the 3 definitions, respectively. Participants included in the "nonchronic" had lower pain interference, greater physical function scores, and fewer participants reporting5 years of pain than in the other definitions. Half the participants meeting the "acute" definition and one-third of participants meeting the "new episode" definition were also classified as cLBP based on the NIH definition.Our results highlight the importance of the definition used for aLBP. Different definitions influence the sample size and clinical profiles (group's characteristics). We recommended that cohort studies examining the transition from aLBP to cLBP ensure that the definitions selected are mutually exclusive (ie, participants included [aLBP] differ from the expected outcome [cLBP]).

Temporal summation of pain (TSP) and conditioned pain modulation (CPM) can be measured using a thermode and a cold pressor test (CPT). Unfortunately, these tools are complex, expensive, and are ill-suited for routine clinical assessments. Building on the results from an exploratory study that attempted to use transcutaneous electrical nerve stimulation (TENS) to measure CPM and TSP, the present study assesses whether a “new” TENS protocol can be used instead of the thermode and CPT to measure CPM and TSP. The objective of this study was to compare the thermode/CPT protocol with the new TENS protocol, by (1) measuring the association between the TSP evoked by the two protocols; (2) measuring the association between the CPM evoked by the two protocols; and by (3) assessing whether the two protocols successfully trigger TSP and CPM in a similar number of participants. We assessed TSP and CPM in 50 healthy participants, using our new TENS protocol and a thermode/CPT protocol (repeated measures and randomized order). In the TENS protocol, both the test stimulus (TS) and the conditioning stimulus (CS) were delivered using TENS; in the thermode/CPT protocol, the TS was delivered using a thermode and the CS consisted of a CPT. There was no association between the response evoked by the two protocols, neither for TSP nor for CPM. The number of participants showing TSP [49 with TENS and 29 with thermode (p < 0.001)] and CPM [16 with TENS and 30 with thermode (p = 0.01)] was different in both protocols. Our results suggest that response to one modality does not predict response to the other; as such, TENS cannot be used instead of a thermode/CPT protocol to assess TSP and CPM without significantly affecting the results. Moreover, while at first glance it appears that TENS is more effective than the thermode/CPT protocol to induce TSP, but less so to induce CPM, these results should be interpreted carefully. Indeed, TSP and CPM response appear to be modality-dependent as opposed to an absolute phenomenon, and the two protocols may tap into entirely different mechanisms, especially in the case of TSP.

Purpose: Chronic pain is a highly prevalent and debilitating condition, and there is a pressing need to find safe, effective and affordable treatments to tackle this public health issue. This pilot study aimed to assess whether therapeutic exercises supplemented by transcutaneous electrical nerve stimulation induces a greater hypoalgesic effect than therapeutic exercises supplemented by sham transcutaneous electrical nerve stimulation, in an elderly population suffering from chronic pain.Materials and methods: Eighteen elderly participants suffering from chronic pain completed a therapeutic exercise program consisting of 45-min group sessions administered twice a week for 4 weeks. Half of the participants received real transcutaneous electrical nerve stimulation during the exercise sessions, while the others received sham transcutaneous electrical nerve stimulation. Participants completed pain questionnaires (McGill Pain Questionnaire, Brief Pain Inventory, Beck Depression Index) before and after the intervention, and recorded their pain levels on an 11-point numerical rating scale before and after each session (Clinical Trial.Gov ID: NCT02445677).Results and conclusion: Our results suggest that supplementing exercise sessions with transcutaneous electrical nerve stimulation does not improve the long-term outcomes of elderly patients suffering from chronic pain, but does induce short-term hypoalgesia during exercise sessions. Our study also offers valuable guidelines for the implementation of a future and adequately powered study looking at this research question.Implications for rehabilitationThe application of transcutaneous electrical nerve stimulation during exercises is well tolerated by elderly individuals suffering from chronic pain.Supplementing exercises with transcutaneous electrical nerve stimulation does not seem to improve general outcome in elderly suffering from chronic pain.Notwithstanding, the addition of transcutaneous electrical nerve stimulation tends to produce a marked hypoalgesic effect during the exercise sessions, an effect that could prompt indirect benefits for pain patients.

Background Organizational readiness is a factor known to influence the predisposition of individuals within an organization to change. Based on Weiner’s organizational theory, the “Organizational Readiness for Implementing Change” (ORIC) questionnaire was developed and validated to measure organizational readiness in healthcare contexts. However, no such tools allow French-speaking organizations to measure this concept. The objectives of this study were to (1) conduct a French cultural adaptation of the ORIC questionnaire, and (2) initiate the study of its psychometric properties. Methods (1) Cross-cultural adaptation and translation processes were first conducted with the methodologies of Beaton, Vallerand and Massoubre. (2) Subsequently, internal consistency was documented by calculating Cronbach’s alpha and inter-item and item-to-scale correlations. The study of construct validity was initiated with a confirmatory factor analysis. Results A French 10-item scale named the Réceptivité organisationnelle à l’implantation d’un changement (ROIC) was developed and pretested by 125 occupational therapists working in Quebec homecare services. Cronbach’s alpha values for the 2 item subscales show satisfactory internal consistency (Commitment: α = 0.84 and Efficacy: α = 0.86). Inter-item correlations revealed that the ROIC’s items are moderately related to each other while item-to-total scale correlations pinpoint items that accounts for variance and influence internal consistency. Confirmatory factor analysis allowed the initiation of a substantial documentation of ROIC’s model fit with the original version (CFI = 0.89, TLI = 0.85, SRMR = 0.08, and RMSEA = 0.12). Conclusions The ROIC is a new theory-based and translated questionnaire that can be used to rigorously document the organizational readiness of French organizations. The ROIC has the potential to support members of different organizations in the identification of subsequent efforts for the implementation of a change. Electronic supplementary material The online version of this article (10.1186/s12913-019-4361-1) contains supplementary material, which is available to authorized users.