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Mechanical back pain

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https://www.readbyqxmd.com/read/28648042/-effects-of-lappaconitine-on-pain-and-inflammatory-response-of-severely-burned-rats-and-the-mechanism
#1
C L Yang, Z R Wei, T H Zhang, X Q Zeng, B H Wu
Objective: To explore the effects of lappaconitine (LA) on pain and inflammatory response of severely burned rats and the mechanism. Methods: Forty SD rats were divided into healthy+ normal saline group, sham injury+ normal saline group, pure burn group, burn+ LA group, and healthy+ LA group according to the random number table (the same dividing method below), with 8 rats in each group. Rats in pure burn and burn+ LA groups were inflicted with about 32% total body surface area deep partial-thickness scald (hereinafter referred to as burn) on the back and right hind...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28645867/psychophysical-and-electrophysiological-evidence-for-enhanced-pain-facilitation-and-unaltered-pain-inhibition-in-acute-low-back-pain-patients
#2
Pascal Henri Vuilleumier, Federico Gabriel Arguissain, José Alberto Biurrun Manresa, Alban Ymer Neziri, Arto Christian Nirkko, Ole Kæseler Andersen, Lars Arendt-Nielsen, Michele Curatolo
The aim of this case-control study was to examine differences in neural correlates of pain facilitatory and inhibitory mechanisms between acute low back pain patients and healthy individuals. Pressure pain tolerance (PPT), electrical pain detection thresholds (EDT), pain ratings to repetitive suprathreshold electrical stimulation (SES) and conditioned pain modulation (CPM) were assessed in 18 patients with acute low back pain (LBP) and 18 healthy controls (CTRL). Furthermore, event-related potentials (ERPs) in response to repetitive SES were obtained from high-density electroencephalography...
June 20, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28645253/a-case-report-of-thoracolumbar-paraspinal-myopathy-as-the-cause-of-camptocormia-in-a-patient-with-atypical-parkinsonism
#3
Yoon Kim, Ahro Kim, Aryun Kim, Beomseok Jeon
BACKGROUND: Camptocormia is severe flexion of the thoracolumbar spine, exaggerated during standing and walking but minimized in supine position. Even though camptocormia is a relatively common condition during the course of Parkinson's disease, there is ongoing controversy concerning its mechanisms. The most widely accepted and yet still disputed one is dystonia. However, based on myopathic changes observed in the paraspinal muscle biopsies of some PD patients with camptocormia, the attempt to attribute camptocormia to myopathy has continued...
June 23, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28645219/pullulan-microbeads-si-hpmc-hydrogel-injectable-system-for-the-sustained-delivery-of-gdf-5-and-tgf-%C3%AE-1-new-insight-into-intervertebral-disc-regenerative-medicine
#4
Nina Henry, Johann Clouet, Audrey Fragale, Louise Griveau, Claire Chédeville, Joëlle Véziers, Pierre Weiss, Jean Le Bideau, Jérôme Guicheux, Catherine Le Visage
Discogenic low back pain is considered a major health concern and no etiological treatments are today available to tackle this disease. To clinically address this issue at early stages, there is a rising interest in the stimulation of local cells by in situ injection of growth factors targeting intervertebral disc (IVD) degenerative process. Despite encouraging safety and tolerability results in clinic, growth factors efficacy may be further improved. To this end, the use of a delivery system allowing a sustained release, while protecting growth factors from degradation appears of particular interest...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28643966/-what-is-the-role-of-surgery-in-low-back-pain-associated-with-modic-changes
#5
Pietro Aniello Laudato, Viktor Bartanusz
Benign low back pain is frequent in the lucratively active population. Degenerative changes are considered the most frequent causes. The identification of pain generators remain challenging. Bone marrow lesions, Modic changes, are frequently associated with benign low back pain, mostly type 1. The etiology of Modic changes is unknown, both infectious and autoimmune mechanisms have been suggested. Despite the strong association of Modic changes with low back pain it is not clear whether lumbar surgery (lumbar fusion, total disc replacement) has any role in the management of these patients...
June 21, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28643963/-neuropathic-component-of-low-back-pain
#6
Sandra Silva, Mirko D Gutzmann, Marc R Suter
Despite the advances in the understanding of the underlying mechanisms of chronic low back pain, treatment remains challenging in clinical practice. In this article we are focusing on the neuropathic component of chronic low back pain. Indeed, depending on which diagnostic tools are used, 16-55% of patients suffering from chronic low back pain present a neuropathic component. We here expose the specific mechanisms of neuropathic pain, the diagnostic tools available for their detection as well as the specific treatment options...
June 21, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28642835/differential-carbonyl-stress-expression-in-the-intervertebral-disc-between-singular-and-persistent-mechanical-injuries
#7
Itaru Hibino, Simon Tang
Low back pain is a significant public health problem worldwide. Intervertebral disc degeneration is most significant known risk factor for low back pain. Yet the mechanisms of degeneration remain relatively unknown. Carbonyl stress and oxidation have been implicated in cartilage and fibrocartilage degeneration. Here we investigate the role of oxidative stress and carbonyl production in the intervertebral disc after mechanical injury using an in vitro organ model of the mouse functional spine unit. We use a single-stab insult to model mild injury, and the three-stab insult to model severe trauma...
2017: Nagoya Gakuin Daigaku Ronshu Igaku Kenko Kagaku Supotsu Kagakuhen
https://www.readbyqxmd.com/read/28638926/-mechanisms-and-applications-of-transcutaneous-electrical-nerve-stimulation-in-analgesia
#8
Zheng-Yu Tang, Hui-Quan Wang, Xiao-Lei Xia, Yi Tang, Wei-Wei Peng, Li Hu
Transcutaneous electrical nerve stimulation (TENS), as a non-pharmacological and non-invasive analgesic therapy with low-cost, has been widely used to relieve pain in various clinical applications, by delivering current pulses to the skin area to activate the peripheral nerve fibers. Nevertheless, analgesia induced by TENS varied in the clinical practice, which could be caused by the fact that TENS with different stimulus parameters has different biological mechanisms in relieving pain. Therefore, to advance our understanding of TENS in various basic and clinical studies, we discussed (1) neurophysiological and biochemical mechanisms of TENS-induced analgesia; (2) relevant factors that may influence analgesic effects of TENS from the perspectives of stimulus parameters, including stimulated position, pulse parameters (current intensity, frequency, and pulse width), stimulus duration and used times in each day; and (3) applications of TENS in relieving clinical pain, including post-operative pain, chronic low back pain and labor pain...
June 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28638331/monosynaptic-stretch-reflex-fails-to-explain-the-initial-postural-response-to-sudden-lateral-perturbations
#9
Andreas Mühlbeier, Christian Puta, Kim J Boström, Heiko Wagner
Postural reflexes are essential for locomotion and postural stability, and may play an important role in the etiology of chronic back pain. It has recently been theoretically predicted, and with the help of unilateral perturbations of the trunk experimentally confirmed that the sensorimotor control must lower the reflex amplitude for increasing reflex delays to maintain spinal stability. The underlying neuromuscular mechanism for the compensation of postural perturbations, however, is not yet fully understood...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28637600/distinguishing-between-nociceptive-and-neuropathic-components-in-chronic-low-back-pain-using-behavioural-evaluation-and-sensory-examination
#10
N Spahr, D Hodkinson, K Jolly, S Williams, M Howard, M Thacker
BACKGROUND: Diagnosis of chronic low back pain (CLBP) is traditionally predicated on identifying underlying pathological or anatomical causes, with treatment outcomes modest at best. Alternately, it is suggested that identification of underlying pain mechanisms with treatments targeted towards specific pain phenotypes may yield more success. Differentiation between nociceptive and neuropathic components of CLBP is problematic; evidence suggests that clinicians fail to identify a significant neuropathic component in many CLBP patients...
February 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28635877/-a-neuropathic-component-of-lumboischialgia-mechanisms-of-development-and-treatment-approaches
#11
M V Churyukanov, G E Shevtsova, O I Zagorulko
Low back pain (LBP) is accompanied by the development of pain syndrome that spreads into the leg in 25-57% of patients. This is an important factor predicting the risk of transition of pain from acute to chronic and is an indirect indicator of disease severity. It is often impossible to specify the primary mechanism facilitated pain irradiation in lumboischialgia because many structures can cause analogous symptoms. Mechanisms of development of LBP are represented by nociceptive, neuropathic and psychogenic components...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28634547/kinesiophobia-pain-muscle-functions-and-functional-performances-among-older-persons-with-low-back-pain
#12
Nor Azizah Ishak, Zarina Zahari, Maria Justine
OBJECTIVES: This study aims (1) to determine the association between kinesiophobia and pain, muscle functions, and functional performances and (2) to determine whether kinesiophobia predicts pain, muscle functions, and functional performance among older persons with low back pain (LBP). METHODS: This is a correlational study, involving 63 institutionalized older persons (age = 70.98 ± 7.90 years) diagnosed with LBP. Anthropometric characteristics (BMI) and functional performances (lower limb function, balance and mobility, and hand grip strength) were measured...
2017: Pain Research and Treatment
https://www.readbyqxmd.com/read/28633066/an-emg-assisted-modeling-approach-to-assess-passive-lumbar-tissue-loading-in-vivo-during-trunk-bending
#13
Xiaopeng Ning
Lower back pain (LBP) is a condition with high prevalence and high cost both in the United States and around the world. The magnitude of mechanical loading on spine is strongly associated with the occurrence of LBP. Previously, to assess spinal loading, biologically assisted biomechanical models were developed to estimate trunk muscle contraction forces. Loadings on lumbar passive tissues are estimated using anatomical models. However, despite the substantial individual variability in lumbar ligament geometry and viscoelastic properties, the existing anatomical models do not account for these differences...
June 10, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28632555/changes-in-cytokines-sensory-tests-and-self-reported-pain-levels-after-manual-treatment-of-low-back-pain
#14
Brian F Degenhardt, Jane C Johnson, Christian Fossum, Chad T Andicochea, Melissa K Stuart
STUDY DESIGN: Unbalanced 3-factor design with repeated measures on 1 factor. OBJECTIVE: To determine the effect of manual treatment (MT) on cytokine and pain sensations in those with and without low back pain (LBP). SUMMARY OF BACKGROUND DATA: Evidence suggests that MT reduces LBP but by unknown mechanisms. Certain cytokines have been elevated in patients with LBP and may be affected by MT. METHODS: Participants aged 20-60 years with chronic LBP or without LBP were recruited and randomly assigned to MT, sham ultrasound treatment, or no treatment groups...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28632553/lumbar-retrolisthesis-in-aging-spine-what-are-the-associated-factors
#15
Feng Zhu, Hongda Bao, Zhen Liu, Zezhang Zhu, Shouyu He, Yong Qiu
STUDY DESIGN: A retrospective radiographic study. OBJECTIVE: The aim of this study is to demonstrate that lumbar retrolisthesis serves as an important compensatory mechanism and to identify the possible factor related to lumbar retrolisthesis. SUMMARY OF BACKGROUND DATA: Lumbar instability is one of the common degenerative changes, which presents as 2 radiologic features: anterolisthesis and retrolisthesis. Compared with the extensive studies on anterolisthesis, limit data are available on the characteristics and clinical relevance of lumbar retrolisthesis...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28624722/age-related-differences-in-the-response-of-the-l5-s1-intervertebral-disc-to-spinal-traction
#16
Ulrike H Mitchell, Paul F Beattie, Jennifer Bowden, Robert Larson, Haonan Wang
BACKGROUND: Lumbar traction is a common treatment for low back pain; however its mechanisms of action are poorly understood. It has been hypothesized that a key effect of lumbar traction is its capacity to influence fluid movement within the intervertebral disc (IVD). OBJECTIVES: To determine differences in the apparent diffusion coefficient (ADC) obtained with lumbar diffusion-weighted imaging (DWI) of the L5-S1 IVD before, and during, the application of lumbar traction...
June 9, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28623897/altered-somatosensory-profile-according-to-quantitative-sensory-testing-in-patients-with-degenerative-lumbar-spine-disorders-scheduled-for-surgery
#17
Yvonne Lindbäck, Hans Tropp, Paul Enthoven, Björn Gerdle, Allan Abbott, Birgitta Öberg
BACKGROUND: Somatosensory profiling in affected and non-affected body regions can strengthen our insight regarding the underlying pain mechanisms, which can be valuable in treatment decision making and to improve outcomes, in patients with degenerative lumbar spine disorders pre-surgery. The aim was to describe somatosensory profiles in patients with degenerative lumbar spine disorders, to identify the proportion with altered somatosensory profile, and to analyze demographic characteristics, self-reported function, pain, and health pre- and 3 months post-surgery...
June 17, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28617390/-pathopsychological-aspects-of-low-back-pain
#18
A I Krupatkin, A A Kuleshov, T V Sokolova, A O Gospod
Low back pain is one of the most common causes of disability in the world. Discogenic process is the leading component of the disease. A significant part of these pain syndromes become chronic that leads to disability and social maladjustment. Chronic low back pain is hard to treat due to the several types of pathogenesis. The paper analyzes the etiology, mechanisms of development, clinical features, specific characteristics, pathomorphology of the formation of psychogenic component of pain. A role of comorbid psychogenic states involved in the chronization of low back pain is considered...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28615967/assessment-of-direct-analgesic-effect-of-duloxetine-for-chronic-low-back-pain-post-hoc-path-analysis-of-double-blind-placebo-controlled-studies
#19
Hiroyuki Enomoto, Shinji Fujikoshi, Jumpei Funai, Nao Sasaki, Michael H Ossipov, Toshinaga Tsuji, Levent Alev, Takahiro Ushida
BACKGROUND: Comorbid depression and depressive symptoms are common in patients with chronic low back pain (CLBP). Duloxetine is clinically effective in major depressive disorder and several chronic pain states, including CLBP. The objective of this post hoc meta-analysis was to assess direct and indirect analgesic efficacy of duloxetine for patients with CLBP in previous clinical trials. METHODS: Post hoc path analyses were conducted of 3 randomized, double-blind, clinical studies of patients receiving duloxetine or placebo for CLBP...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28615730/pain-in-ankylosing-spondylitis-a-neuro-immune-collaboration
#20
REVIEW
Katayoon Bidad, Eric Gracey, Kasey S Hemington, Josiane C S Mapplebeck, Karen D Davis, Robert D Inman
Clinicians have commonly differentiated chronic back pain into two broad subsets: namely, non-inflammatory (or mechanical) back pain and inflammatory back pain. As the terminology suggests, the latter category, in which ankylosing spondylitis (AS) is prominent, presupposes a close link between pain and inflammation. Advances in research into the genetics and immunology of AS have improved our understanding of the inflammatory processes involved in this disease, and have led to the development of potent anti-inflammatory biologic therapeutic agents...
July 2017: Nature Reviews. Rheumatology
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